Fermented foods are truly superfoods that offer a wide array of health benefits, especially for gut health. Fermentation is an ancient process that humans have utilised for centuries to preserve food. Though it might seem complex, it’s actually quite simple and has been a staple in many cultures worldwide.
The fermentation-process not only extends the shelf life of food but enhances its nutritional profile, making it easier for our bodies to digest and absorb essential nutrients.
In the past, fermented foods were often limited to specific cultural groups or health-conscious individuals, but today they are gaining widespread popularity. Yogurt, kimchi, sauerkraut, and kombucha are now mainstream, and their benefits are well-known, particularly for their role in gut health.
Fermented Foods Are Big Business Today
Today, fermented food has become big business, the current size of the global market of fermented foods, according to estimates, is in the vicinity of USD 30 billion, with increasing trends.(Voidarou 2020)
As research continues to reveal the profound impact our gut microbiome has on overall health, fermented foods are being recognised as key components of a healthy diet.
Fermented foods like kimchi, sauerkraut, and kombucha provide essential probiotics, enzymes, and beneficial bacteria that support digestion, boost immunity, and even improve mental health. These foods also help maintain a balance of good and bad bacteria in the gut, which is crucial for proper nutrient absorption and overall health.
Key Take-Away
Fermentation has been used for thousands of years to preserve food and enhance its nutritional value.
Fermented foods are packed with probiotics, enzymes, and beneficial bacteria that support gut health.
Today, fermented foods are widely consumed and recognized as essential for maintaining a healthy digestive system and overall well-being.
The popularity of fermented foods continues to grow as more people realize their health benefits, particularly for gut health.
Fermented Foods Have An Ancient Past
Fermented foods have a deep-rooted history that spans thousands of years, dating back to ancient civilizations. As far back as 1,000 BC, people were pressing grapes and making wine, with fermentation being a key part of many cultures’ food preservation methods. One notable example is the development of cheese-making around 6,500 BC, which was a significant advancement in preserving milk and enriching the diet.
Before modern nutritional science or food manufacturing, fermented foods like yogurt and sauerkraut weren’t just a way to preserve food, they were also vital sources of nutrition. These foods provided essential vitamins, minerals, and calories, and were rich in live probiotic bacteria that benefited overall health (Tamang 2020). Fermented foods have been, and continue to be, a valuable tool for maintaining gut health.
Research has revealed that many fermented foods contain an incredible concentration of beneficial microorganisms, often at least ten million per gram (Rezac 2018). These microorganisms, including various species of lactic acid bacteria, are known to support human health by promoting a balanced and diverse microbiome. A healthy, diverse microbiome is crucial for strengthening the immune system and helping the body defend against bacterial and fungal infections.
Key Take-Aways
Fermented foods date back thousands of years, with early civilizations using them for food preservation and nutrition.
Foods like yogurt and sauerkraut offered essential vitamins, minerals, and live probiotic bacteria long before modern food science.
Many fermented foods contain millions of beneficial microorganisms that contribute to a healthy and diverse gut microbiome.
A balanced microbiome plays a crucial role in supporting the immune system and fighting infections.
What is Fermentation?
Fermentation is a natural process where a sugar undergoes breakdown into simpler components by enzymes of different micro-organisms. Typically, yeast and bacteria are involved, contributing to the transformation. This process is responsible for the creation of various foods and beverages like beer, wine, sauerkraut, bread, kimchi, yogurt, and more.
Oxygen is not required for this process to occur. Bacteria and fungi have genes that allow them to produce enzymes to break down specific types of sugar metabolites, that come from carbohydrate-rich foods or drinks.
Two Main Ways Of Fermenting Food
Fermenting food can be approached in two main ways, each offering unique results and benefits. Understanding these methods can deepen your appreciation for the variety of flavors, textures, and health benefits that fermented foods provide.
Spontaneous Fermentation
This method relies on the natural presence of wild bacteria and yeast, either from the food itself or the surrounding environment. Spontaneous fermentation happens without any added starters and is common in traditional food preparations. Over time, wild microbes transform the food, creating distinctive flavors and textures. Examples: Kimchi and Sauerkraut
Culture-Dependent Fermentation
This approach uses a starter culture to initiate the fermentation process. A starter culture is made up of specific strains of bacteria or yeast that are carefully introduced to the food to ensure controlled fermentation. This method is used to create fermented foods with more consistent flavours and textures. Examples: Kefir, Yogurt, Natto, Tempeh, and Kombucha.
Both spontaneous and culture-dependent fermentation methods allow for the production of different types of fermented foods, each offering its own distinct set of benefits and characteristics. Whether you’re making sauerkraut, yogurt, or sourdough bread, experimenting with both methods at home can be a fun and educational way to explore the science and tradition behind fermentation.
Key Take-Away
There are two main methods of fermenting food: spontaneous fermentation and culture-dependent fermentation.
Spontaneous fermentation relies on wild bacteria and yeast, common in foods like kimchi and sauerkraut.
Culture-dependent fermentation uses starter cultures to ensure consistent results, seen in foods like kefir, yogurt, and kombucha.
Both methods offer distinct flavors, textures, and health benefits, making them valuable tools in the world of fermentation.
Fermented foods are an excellent source of probiotics—beneficial microorganisms that play a crucial role in maintaining a healthy gut microbiome. By increasing our intake of prebiotic foods, fibre-rich foods and lactic acid rich (fermented) foods, we’ll find it easier to restore our gut microbiome to optimal functioning.
Here are some key benefits that fermented foods provide:
Support Digestive Health
Probiotics in fermented foods help aid digestion, reduce bloating, and alleviate symptoms of gastrointestinal disorders like irritable bowel syndrome (IBS).
The beneficial bacteria contribute to better nutrient absorption and a more efficient digestive process.
Gut Microbiome Health
Fermented foods can positively influence the gut microbiome, which is essential for overall health.
Lactic acid bacteria (LAB), one of the most studied probiotics, produce vitamins, minerals, enzymes, and biologically active peptides that are vital for gut health.
Nutrient Production
LAB contribute to the production of vitamins and minerals, which are crucial for overall well-being.
These microorganisms also help break down anti-nutrients, which can otherwise hinder nutrient absorption (Sanlier et al., 2017).
Providing nutrients that promote or inhibit the growth of certain microbiome members.
Introducing beneficial microorganisms that may establish residence in the gut or interact with existing microbiota, enhancing gut health.
Key Take-Away
Fermented foods are rich in probiotics, which promote digestive health and alleviate symptoms of disorders like IBS.
Lactic acid bacteria in fermented foods help produce vitamins, minerals, enzymes, and biologically active peptides, while also eliminating anti-nutrients.
They positively impact the gut microbiome by either providing nutrients or introducing beneficial microorganisms.
Consuming fermented foods can lead to a healthier and more diverse gut microbiome, which supports overall well-being.
Here are several reasons why probiotic-rich fermented foods have become so popular:
Probiotic Foods Are Rich In Beneficial Bacteria
Fermented foods are incredibly rich in beneficial bacteria, which play a critical role in promoting overall gut health and strengthening the immune system. Here’s why incorporating probiotic-rich fermented foods is important for Candida, SIBO recovery, and general health:
Key Benefits of Probiotic Foods:
Support Candida and Gut Health
Fermented foods promote the development and colonisation of beneficial bacteria in the gut.
This can help clear Candida yeast infections or SIBO more effectively, improving gut health and overall digestion.
The presence of lactic acid bacteria helps restore the microbiome to optimal functioning.
Strengthening Natural Defences
People who regularly consume fermented foods tend to recover more quickly from illness and rarely get sick with colds or flu.
Their strong and healthy gut microbiome is likely a key reason for this enhanced immunity.
Gut-Lung Connection
Studies have revealed a gut-lung relationship where probiotic bacteria positively affect the signs and symptoms of influenza (Lu et al., 2021).
Aid in Digestion and Elimination
Naturally cultured or lacto-fermented foods contain enzymes and bacteria that assist in digestion and waste elimination.
They support the growth of beneficial bacteria, which is crucial for efficient digestion and absorption of nutrients, such as Vitamin B12 (Leeuwendaal 2022).
Reducing Inflammation
Chronic low-grade inflammation is linked to various diseases, and dysbiosis (imbalance in gut bacteria leading to SIBO) is a key driver of this (Furman 2019).
Maintaining a healthy gut microbiome helps reduce inflammation in the body, which is crucial for preventing chronic diseases ((Zhang 2022).
Studies show that a diet high in fermented foods can increase microbiome diversity while decreasing harmful inflammatory proteins (Weaver 2021).
Key Take-Away
Probiotic-rich fermented foods strengthen gut health and immune function, aiding in the recovery from Candida, SIBO, and other gut conditions.
They contain enzymes and beneficial bacteria that support digestion, waste elimination, and nutrient absorption (especially Vitamin B12).
A healthy gut microbiome helps reduce chronic inflammation, lowering the risk of developing various chronic diseases.
Consuming fermented foods increases microbiome diversity, supporting overall health and well-being.
Fermented Foods for Irritable Bowel Syndrome (IBS)
If you suffer from Irritable Bowel Syndrome (IBS), incorporating fermented foods like sauerkraut and kimchi into your diet may provide significant relief. Here’s how fermented foods can help control IBS symptoms:
Gut Microbiome Improvement
Research has shown that consuming fermented foods like sauerkraut can positively affect the gut microbiome of people with IBS.
A study found that sauerkraut led to improvements in IBS symptoms and microbial changes in the gut (Garnås 2023)
If you have inflammatory bowel disease (IBD), fermented foods like kimchi can also be beneficial.
A Korean study found that kimchi can help manage IBD, including conditions like Crohn’s disease (Huei-Lim 2011).
Boosting Beneficial Bacteria & Fibre Intake
By consuming fermented foods along with high-fibre foods, you are promoting a healthy gut environment, supporting living beneficial bacteria.
This combination also increases the production of short-chain fatty acids (SCFAs), which have anti-inflammatory, anti-tumour, and anti-microbial effects, improving gut health and integrity (Tan 2014).
Lactic Acid Bacteria (LAB) Benefits
Regular consumption of fermented foods provides lactic acid bacteria (LAB), which are crucial for maintaining a healthy gut (Verna and Lucak 2010).
Key Take-Away
Sauerkraut and kimchi are effective in improving IBS symptoms by promoting positive changes in the gut microbiome.
Fermented foods, combined with high-fibre foods, support the production of short-chain fatty acids that benefit gut health and reduce inflammation.
Lactic acid bacteria from fermented foods help reduce the severity of gut disorders like IBS and IBD.
Fermented Foods Help Heal Gut Damage
Our gut microbiota plays a crucial role in overall health, but antibiotics, environmental toxins, and highly processed foods can damage it, leading to reduced microbial diversity and a weakened immune system.
Over time, an imbalanced gut can contribute to chronic inflammation and conditions such as (Bull 2014):
Irritable Bowel Syndrome (IBS)
Depression & Anxiety
Eczema & Skin Conditions
Diabetes & Obesity
How Fermented Foods Support Gut Healing
Restoring Microbial Diversity
Studies show that consuming fermented foods increases gut microbiome diversity, which improves immune function, weight regulation, cardiovascular health, glucose metabolism, and even mood and cognitive function (Marco 2017).
Lactobacillus & Gut Health
A 2022 study emphasised the importance of Lactobacillus in human health, highlighting that a diverse diet rich in grains, fruits, vegetables, and fermented foods—such as miso, kimchi, and sauerkraut—can significantly enhance gut microbial complexity (Dempsey 2022).
Strengthening the Immune System
Fermented foods help rebuild the gut lining, restore probiotic bacteria, and reduce chronic inflammation, protecting against gut-related diseases.
Key Take-Away
Antibiotics, toxins, and processed foods damage gut health, leading to chronic conditions.
Lactobacillus-rich foods like kimchi, sauerkraut, and miso support gut healing and overall well-being.
Fermented Foods Improve Nutritional Value of Foods
By boosting the bioavailability of nutrients that have been stored, the fermentation process also improves the nutritional value of many foods.
For example, a study has found sauerkraut may also help in maintaining brain health by increasing our gut’s absorption of brain-regulating minerals, including zinc and magnesium. (Selhub 2014)
The beneficial compounds that give these foods their antioxidant, anti-microbial, anti-fungal, anti-inflammatory, anti-diabetic, and anti-ageing properties are also made by the beneficial bacteria that are responsible for many ferments. Bacteria like lactobacillus and Bifidobacteria produce vitamins, enzymes, and useful peptides like conjugated linoleic acid as by-products of fermentation. (Sanlier 2017)
Fermented Foods Are Naturally Antimicrobial
Fermented foods have been valued for centuries for their ability to support gut health and prolong life by reducing harmful microbes in the body. Their antimicrobial properties arise from the organic acids, bacteriocins, and other bioactive compounds they produce during fermentation. These compounds create an environment that inhibits the growth of pathogenic bacteria, molds, and yeasts (Dimidi et al., 2019).
How Fermented Foods Fight Pathogens
Acid Production
Lactic acid bacteria (LAB) in foods like sauerkraut and yogurt produce lactic acid, which lowers pH and creates an unfriendly environment for harmful microbes.
Natural Antibiotic Effects
Some beneficial bacteria in fermented foods produce antimicrobial compounds. For example, Lactobacillus reuteri, found in yogurt, produces reuterin, a broad-spectrum antimicrobial active against bacteria, yeasts, fungi, protozoa, and even viruses (Syngai et al., 2016).
Probiotics vs. Harmful Microbes
Certain probiotics found in fermented foods outcompete harmful bacteria in the gut, preventing infections and supporting immune function (Cleusix 2008).
Enhanced Food Safety & Preservation
Fermentation extends the shelf life of food by reducing spoilage bacteria and lowering the risk of food-borne illnesses.
Key Take-Away
Fermented foods create hostile conditions for pathogens, improving gut health.
Reuterin from Lactobacillus reuteri acts as a natural antibiotic.
Fermented foods increase food safety by preventing spoilage and contamination.
Regular consumption supports immune function and overall well-being.
Fermented Foods During Pregnancy
Maintaining a balanced gut microbiome is essential during pregnancy, not just for the mother’s health but also for the baby’s immune system development. Eating fermented foods before and during pregnancy helps ensure that beneficial bacteria are passed on to the child at birth.
Why Fermented Foods Matter in Pregnancy
Traditional Use in Pregnancy Diets
Many cultures, including Japan and Korea, have long incorporated fermented foods like miso, natto, pickles, and yogurt during pregnancy.
Supporting Digestion & Preventing Infections
Pregnancy can lead to digestive slowdowns and constipation, making naturally fermented foods particularly beneficial.
Many women become more prone to vaginal thrush during pregnancy, and fermented foods help prevent yeast overgrowth.
Potential Benefits for Infant Health
A Japanese study found that consuming fermented foods during pregnancy may improve infant sleep patterns in early childhood (Inoue 2022).
Research suggests fermented foods may positively influence neonatal and infant health, serving as a natural alternative to probiotic supplements (Erçelik et al., 2024).
A Natural Approach to Gut Health
While yogurt is sometimes used as a douche, many women are unaware of the benefits of consuming kefir, kimchi, sauerkraut, and yogurt during pregnancy.
These foods can reduce bacterial and yeast infections, improve digestion, and promote a healthy gut microbiome for both mother and baby.
Key Take-Away
Fermented foods support digestive health and reduce constipation during pregnancy.
They help prevent vaginal thrush and maintain a balanced microbiome.
Research links fermented food intake to better infant sleep patterns.
They may be a safe alternative to probiotic supplements for pregnant women.
Traditional diets worldwide incorporate fermented foods as part of pregnancy nutrition.
Sauerkraut is an exceptional fermented food that transforms ordinary cabbage into a probiotic powerhouse through lactic acid fermentation. This ancient preservation method enhances its nutritional profile and gut-healing properties.
Why Sauerkraut is Special
Powerful Fermentation Process – Raw cabbage, when combined with salt and lactic acid bacteria, ferments into a nutrient-rich superfood over several weeks.
Rich in Beneficial Bacteria – Sauerkraut contains Lactobacilli, which thrive by fermenting natural sugars in cabbage juice, supporting a healthy gut microbiome (Yoon et al., 2006).
A Gut-Healing Food – The fermentation process creates beneficial organic acids that can aid conditions like Candida, SIBO, IBS, and IBD.
Comparable to Other Fermented Foods – Sauerkraut is similar to yogurt and kefir, as all three rely on beneficial bacteria to transform sugars into probiotics.
In this article, we’ll explore sauerkraut’s benefits for gut health and provide my personal step-by-step guide to making it at home.
Yoghurt: A True Superfood For Gut and Overall Health
Yogurt is an exceptional probiotic food with numerous health benefits, making it more essential than ever in today’s diet. Its nutrient-rich composition and probiotic content support gut health and overall well-being.
Why Yogurt is a Must-Have Food
Packed with Nutrients – Compared to milk, yogurt contains higher levels of vitamins A, D, and B-complex, along with essential minerals like calcium, phosphorus, potassium, and zinc.
Supports Gut and Immune Health – Probiotics in yogurt act as a natural antibiotic, aiding digestion and helping prevent Candida, SIBO, IBS, IBD, and even certain cancers (Savaiano et al., 2021) (Hadjimbei et al., 2022).
Beneficial for Many Conditions – Yogurt consumption has been linked to improvements in cholesterol levels, respiratory health, arthritis, gallstones, osteoporosis, and skin issues.
Superior to Milk – Unlike milk, real yogurt with live cultures provides beneficial bacteria that enhance digestion and nutrient absorption.
In this article, we’ll take a deeper dive into yogurt’s benefits for gut health and provide you with a step-by-step guide to making your own amazing yogurt at home.
Sourdough bread stands out as one of the healthiest and most digestible types of bread available today. Unlike commercially processed breads that often contain refined flours, artificial additives, and fast-rising yeast, sourdough is made using a natural fermentation process that enhances both its nutritional profile and digestibility.
Why Choose Sourdough Over Regular Bread?
Naturally Fermented for Better Digestion
Sourdough is made with wild yeast and lactic acid bacteria, rather than industrial yeast. This slow fermentation partially breaks down gluten, making it easier to digest and gentler on the gut, especially for those with gluten sensitivities.
Rich in Beneficial Nutrients
The fermentation process also helps to reduce phytic acid, an anti-nutrient found in grains that blocks the absorption of essential minerals like iron, magnesium, and zinc. This means your body can absorb more nutrients from sourdough compared to regular bread.
Lower Glycemic Impact
Thanks to its longer fermentation, sourdough has a lower glycemic index, meaning it doesn’t spike blood sugar levels as quickly as standard white or whole wheat bread. This makes it a better choice for those looking to maintain steady energy and support metabolic health.
Naturally Preserved and Flavorful
The fermentation process enhances the taste of sourdough, giving it a rich, tangy flavor and a chewy texture, while also acting as a natural preservative that keeps the bread fresh longer without the need for additives.
Personally, I find sourdough to be the most agreeable bread for my digestive system. Unlike commercially made bread, which can feel heavy and difficult to digest, sourdough provides a satisfying, nourishing, and gut-friendly alternative. If you’re looking for a healthier bread option, sourdough is definitely worth adding to your diet!
Kefir is a fermented milk or water-based drink made through the action of beneficial bacteria and yeasts that exist in a symbiotic relationship within kefir grains. These microorganisms break down sugars in milk or water, transforming them into a nutrient-rich probiotic beverage with a naturally tangy, slightly effervescent taste.
Why Kefir is So Beneficial
Rich in Probiotic Bacteria – Kefir contains a wide variety of probiotic strains, far more than yogurt, helping to support gut health, digestion, and immune function (Bourrie et al., 2016).
Powerful Bioactive Compounds – Studies show kefir has anti-microbial, anti-tumour, antioxidant, anti-inflammatory, and immune-boosting properties, making it a powerful functional food.
Easier to Digest Than Milk – The fermentation process breaks down lactose, making kefir a great choice for those who are lactose-intolerant.
Versatile and Delicious – Kefir can be enjoyed as a drink, added to smoothies, or used in recipes as a probiotic-rich ingredient.
With its vast health benefits and diverse micro-organisms, kefir is often called the “21st century yogurt”—a true superfood for gut and overall health!
Kimchi, like sauerkraut, undergoes spontaneous fermentation, primarily driven by lactic acid bacteria. This process not only enhances the flavor but also eliminates harmful pathogenic bacteria, making kimchi a natural probiotic food with gut-health benefits similar to yogurt (Park 2014).
Why Kimchi is a Nutritional Powerhouse
Rich in Probiotics
Kimchi contains beneficial lactic acid bacteria that support digestion, immunity, and gut microbiome balance.
Boosts Natural Energy (“Chi”)
The name “kimchi” reflects the concept of “chi” (gi, ki), meaning vital energy, emphasizing its role in promoting overall well-being.
Best Eaten Raw for Maximum Benefits
While kimchi can be cooked, consuming it raw preserves the live probiotics, ensuring maximum health benefits.
A Staple for Year-Round Health
Properly fermented kimchi helps preserve vegetables naturally, offering a delicious, crunchy, and nutritious addition to any diet.
Before diving into its numerous health benefits, it’s important to choose the right type of cabbage for making kimchi—Chinese (Napa) cabbage, which differs from the cabbage used in sauerkraut.
In this article, we’ll take a deeper dive into kimchi’s benefits for gut health and provide you with a step-by-step guide to making your own amazing kimchi at home.
Fermented foods are more popular than ever as research continues to reveal the importance of the gut microbiome. Kombucha, once a niche health product, is now widely available in grocery stores. I’ve been making kombucha since the 1980s, back when fermented foods were seen as unconventional and mainly consumed by so-called “health freaks.”
Even though fermented foods offer many health benefits, they don’t work for everyone. Some people experience digestive discomfort, and in some cases, this may be due to histamines—compounds produced by specific bacteria during fermentation.
Some individuals feel unwell after eating fermented foods due to histamines, which can cause headaches, nausea, or skin reactions.
Overconsumption at First
It’s common for people to eat too much too quickly when starting out with fermented foods, leading to symptoms like bloating or cramps.
Home Fermentation Challenges
Improper fermentation can lead to suboptimal results, though properly made homemade ferments are generally safe and beneficial.
Temporary Bloating and Gas: A Sign of Gut Changes
The most common side effects of consuming probiotic-rich foods are gas and bloating. This happens because probiotic bacteria kill off harmful bacteria and fungi, causing a microbiome shift that results in excess gas production.
Probiotics Release Antimicrobial Peptides – These help eliminate harmful bacteria like Salmonella and E. coli, improving gut health over time.
Bloating Can Be a Good Sign – Some discomfort after consuming yogurt or other probiotic foods may indicate that the gut is flushing out bad bacteria. (Prabhuajeshwar 2019).
For most people, these symptoms resolve over time as the gut microbiome adjusts. Properly fermented foods, when consumed in moderation, can be an important part of a balanced diet and long-term gut health.
Things To Be Aware of With Fermented Foods
I’ll be the first to admit—I messed up big-time when I first started making fermented foods. I didn’t understand the process, and back in the early 1980s, my only source of knowledge was a library – miles away. Over time, I learned how to make and consume sauerkraut properly, and more importantly, how to benefit from it. Here are a few key points to consider when introducing fermented foods, especially if you’re on a Candida, SIBO, keto, or paleo diet.
Be Prepared for Some Initial Reactions….
Fermented foods introduce live bacteria into your gut, which can cause temporary bloating or gas. This is often mistaken for a worsening condition like Candida but is actually part of the gut’s natural adaptation process.
Gut Adjustments Are Normal – Initial symptoms can and often appear as probiotic bacteria kill off pathogens and yeasts in the gut.
Symptoms May Include – bloating, gas (farting), extra bowel motions, and rumbling or gut noises. All of these temporary changes are quite OK.
Distinguish Temporary from Adverse Reactions – If symptoms are severe or persistent, introduce fermented foods more gradually.
Tips for Incorporating Fermented Foods
Always Introduce Slowly
Start with one tablespoon per day and increase gradually. This allows the gut to adjust to new bacteria and yeasts over time.
You’re Introducing New Gut Bacteria
Just like humans, probiotic cultures don’t always get along at first. As beneficial bacteria establish themselves, they push out harmful bacteria, which may cause temporary gas, bloating, or burping.
Observe Hygiene When Making Your OwnFerments
Use clean utensils and containers to avoid introducing harmful bacteria. Some people claim a commercial kitchen is required, but that’s unnecessary—just apply common sense hygiene.
Commercially-Made Ferments Are OK
Store-bought fermented foods can be a great option for those who don’t want to make their own. Price doesn’t always indicate quality when it comes to yogurt or sauerkraut, always buy un-pasteurised fermented foods.
Experiment With Different Fermented Foods
ry different vegetables, salt levels, and fermentation times. Some people tolerate fermented foods better when aged longer or shorter than the typical six-week period. Personally, I enjoy Greek sour yogurt as a snack and sauerkraut a few times a week as part of my meals.
Caution With Ferments With Some Prescribed-Medications
MAOI drugs (for depression/anxiety) can interact negatively with high-tyramine foods like sauerkraut. Tyramine can raise blood pressure, known as the “cheese effect”. If taking isocarboxazid, phenelzine, selegiline, or tranylcypromine, consult your doctor before consuming fermented foods. (Brown, 1989)
By understanding these key points, you can successfully incorporate fermented foods into your diet while minimising potential issues.
Histamines and Fermented Food
Fermented foods like yogurt, sauerkraut, and kimchi naturally contain amines such as histamine and tyramine, produced during the fermentation process. While these amines can have health benefits for many, they may cause issues for a small percentage of individuals.
What Are Histamines?
Histamine is a chemical produced by the immune system to trigger an allergic response. It acts like a bouncer at a club, blocking irritants or allergens from entering the body.
Common allergens like pollen, pet dander, or dust can trigger histamine release, leading to allergy symptoms.
Anti-histamines are used to reduce these symptoms by blocking histamine.
Histamine Intolerance
People who lack the enzyme diamine oxidase (DAO) may have difficulty breaking down histamine (Maintz 2007).
Histamine intolerance occurs when histamine builds up in the bloodstream, causing symptoms like headaches, hives, and digestive discomfort.
It’s estimated that 1-3% of the population has histamine intolerance (Comas-Basté 2020), though it is rare.
The Role of Fermented Foods in Histamine Intolerance
Fermented foods are often high in histamine, which may lead to discomfort in sensitive individuals.
Research involving mice suggests that gut Candida colonisation may promote histamine release in the gut, contributing to histamine intolerance and digestive issues (Yamaguchi 2006).
Managing Histamine in Fermented Foods
If you’re sensitive to histamine, you may need to limit or avoid fermented foods.
Gradual introduction of fermented foods into your diet, or choosing lower histamine options, may help reduce reactions.
For those with histamine intolerance, it’s important to listen to your body and work with a healthcare provider to determine which foods are best suited for your digestive system.
Histamine Symptoms
Histamine intolerance can cause a wide range of symptoms, some of which may be subtle or difficult to detect. While common reactions include skin irritation and digestive discomfort, more serious symptoms can occur as well.
Skin Reactions: Hives, itchy or burning skin, skin redness, and swelling
Digestive Issues: Diarrhea, nausea, vomiting, heartburn, and reflux
Respiratory: Nasal congestion, itchy or sore throat, and throat constriction
General Symptoms: Fatigue, dizziness, weight gain, elevated heart rate
Mental Health: Anxiety, panic, sleep problems, or agitation
Severe Reactions: Asthma attacks, low blood pressure, and irregular heartbeat
Challenges in Identifying Histamine Symptoms
Histamine symptoms often resemble those of food allergies and may not be easy to spot, especially since they can fluctuate or appear slowly.
Symptoms can sometimes be inactive or stall, making them harder to detect over time.
Key Take-Away
Histamine intolerance symptoms can range from mild to severe, affecting many systems in the body.
Symptoms are often mistaken for other conditions, such as food allergies.
Headaches and migraines are common symptoms among those with DAO enzyme deficiency.
Histamines and Headaches
Amines (histamine, tyramine) are vasoactive, meaning they can affect blood flow and contribute to headaches or migraines.
Sensitivity to histamine may trigger headaches or migraines after consuming fermented foods.
Research has shown a link between histamine and migraine headaches, with nearly 90% of migraine patients having a DAO enzyme deficiency (Izqueirdo-Casas, 2018).
DAO deficiency is also found in nearly half of individuals who do not experience migraines, suggesting histamine intolerance plays a larger role in headaches than previously recognised (Worm 2019)
Can Fermented Foods Make My Candida Worse?
When it comes to fermented foods, my clinical experience has shown that patients typically fall into two groups: those who enjoy them and those who don’t. Interestingly, those who regularly consumed fermented foods tended to experience fewer gut issues like constipation, diarrhoea, cramping, bloating, and gas.
Fermented Foods and Gut Health
Regular consumption of fermented foods often led to better gut health.
These patients were also more likely to consume less sweet foods and drink less alcohol, which can positively affect Candida.
Fermented foods help shape the microbiome, influencing taste preferences and overall health.
Fermented Foods and Candida
Even if you have Candida or have been diagnosed with it, you can still enjoy fermented foods.
There’s controversy around whether fermented foods are beneficial or detrimental for Candida. Some believe they may worsen the condition, but others, including myself, remain open-minded.
Fermented foods have been recommended for gut health since the 1980s, and many older natural health books advocated for them as part of a normal healthy diet.
Open-Minded Approach
Keep an open mind when incorporating fermented foods into your diet, especially if you have Candida.
Every person’s body reacts differently, so gradual inclusion of fermented foods and observing how your body responds is key.
Key Take-away
Regular consumption of fermented foods may improve gut health and help reduce gut issues.
Fermented foods can help shape your microbiome and reduce cravings for unhealthy foods.
Despite mixed opinions, fermented foods can be included in a Candida diet for many people.
It’s important to listen to your body and observe how fermented foods affect your health.
Stay Open-Minded About Fermented Foods
You may see hyped-up information like:
“No mushrooms or fungi with Candida”.
“No mouldy or yeasty foods like cheese with Candida”.
“None or limited fermented foods with Candida”.
While many of the scientific studies about fermented foods and Candida are accurate, I’ve found that much of this hype about Candida and fermented foods and consuming fungi like mushrooms on other websites and social media isn’t very accurate unfortunately. Read what one off the world’s leading fungal experts has to say about why eating mushrooms is perfectly fine with a Candida overgrowth : Mushrooms and Candida
A lot of this banter is just “here-say”, similar to the misinformation when it comes to the soy debate. People may inform you to stay away from soy and soy products, because it is a “bad” and “not good” food – when the scientific evidence (EFIC 2024) clearly paints a different picture.
Be aware that just because a post comes from a friend or colleague, it doesn’t mean it’s accurate, comprehensive, or even relevant to your health.
Just because a webpage is written by a medical doctor or dietician, and has been “fact checked”, doesn’t make it the truth either. Information can be written for different purposes, so it pays to be on the alert with any kind of health article!
Please leave a comment with your views, or fermented foods recipe!
Eric Bakker N.D.
Greetings! I am a naturopathic physician from New Zealand. Although I’ve retired from clinical practice since 2019 after 34 years of clinic. I remain passionate about helping people improve their lives. You’ll find I’m active online with a focus on natural health and wellbeing education through my Facebook page, Reddit page and YouTube channel, including this website.
Enhance your digestive health with simple tips. Prioritize fiber-rich foods like fruits, vegetables, and whole grains. Stay hydrated and chew food slowly for optimal digestion. Reduce stress and incorporate regular exercise into your routine. Consult a healthcare professional for personalized advice. These small changes can make a big difference in your overall well-being.
Candida overgrowth has long been linked to gut symptoms, especially in people with weakened immune systems or those using antibiotics or steroids. Recent findings show that Candida can also colonise the small intestine in more healthy people, leading to Small Intestinal Fungal Overgrowth (SIFO).
Avocados contain FODMAPs that can trigger IBS symptoms, with levels varying by portion size. A low-FODMAP serving is 1/8 of an avocado, which is generally safe for those with IBS, though individual tolerance may vary.
Bone Broth is a nutrient dense food and a rich source of collagen, aminos, vitamins and minerals to support immunity, energy, and gut health. Learn how to make the best bone broth.
Elimination diets come in many forms—some more user-friendly than others. For example, the paleo diet is often easier to stick with long-term than the more restrictive low-FODMAPs approach. Each elimination diet has its own focus and limitations, and understanding these differences is key to finding what works for you.
