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The Unexpected Truth About Candida and Gut Health

Written by Dr. Michael Ruscio, DC on November 18, 2024

Written by Dr. Michael Ruscio, DC on November 18, 2024 — Reviewed by Hilary Watts

• What is Candida and Why is it in Your Gut?|
• Symptoms of Candida Overgrowth|
• Should You Always Try to Kill Candida in Your Gut?|
• Addressing the Root Cause of Candida Overgrowth|
• Don’t Make Candida Your Enemy if You Don’t Have To|

The word “Candida” strikes fear into the hearts of many, conjuring visions of terrible yeast infections, intestinal issues, and brain fog. And yet, Candida is an inherent part of the human gut microbiome. Most of the time, it’s there, minding its own business and not giving us any trouble. But when Candida goes rogue, it’s often a sign that something deeper is amiss, usually with our gut health, hormonal balance, and immune system. Rather than a root cause, Candida can be like a canary in the coal mine, signaling that something else needs to be addressed to bring the body back into balance. 

Can Candida and gut health coexist, and can we actually see this yeast as a beneficial part of our microbiome instead of a villain to be feared and destroyed?

In this article, we’ll discuss what Candida is and its role in the gut, symptoms of Candida overgrowth, and whether you should always try to kill off Candida. We’ll also shed light on the root cause of Candida overgrowth, and how to set yourself up for peaceful coexistence with Candida.

What is Candida, and Why is it in Your Gut?

Candida, short for Candida albicans, is a type of fungus and a perfectly natural part of the human gut microbiome 1. However, most people are familiar with Candida as an irritating, itchy yeast infection that shows up in the mouth (oral thrush), skin, or genitals. A yeast infection often appears after a round of antibiotics that kills beneficial and harmful microorganisms in the gut, allowing Candida to grow and overpopulate the gut 2. (This is why it’s important to take probiotics along with antibiotics!)

Candida yeast infections (medically known as candidiasis) can also result from hormonal changes, including pregnancy, consuming a lot of sugar or alcohol, and taking certain medications like steroids or oral contraceptives. In general, women seem to be more prone to candidiasis than men 1. 

But if Candida can easily get out of control and wreak havoc on our systems, why do we have Candida in our guts in the first place? We’re still learning exactly how and why Candida lives in the human gut microbiota (along with other types of fungi). But for now, we can say that it does play a role in our health and well-being and maintaining homeostasis (balance) in the intestinal tract 3 4. 

For example, research shows that C. albicans coevolved with humans, and it might help protect us against lethal Clostridium difficile infections (more commonly known as C. diff). This is one potential reason Candida exists in our gut microbiome 5. 

That’s why I want to challenge the perspective that Candida is inherently bad. It can certainly cause problems when it grows out of control, but that’s more about what kind of environment your digestive system is in than the Candida itself. 

Symptoms of Candida Overgrowth

Typical signs that Candida has turned from a harmless or even helpful microbe to a virulent fungal infection include 1 6: 

• Bloating
• Gas
• Constipation
• Diarrhea
• Skin rash
• Itching/burning
• Vaginal yeast infection
• Leaky gut
• Joint pain
• Irritability
• Depression
• Brain fog

While these are common symptoms of Candida, they can also indicate other pathogens in the gastrointestinal tract, and autoimmune conditions like ulcerative colitis. Having a discussion with a functional healthcare provider can help you figure out the root cause of your symptoms and where to start with treatment. 

Should You Always Try to Kill Candida in Your Gut?

When faced with a yeast infection or too much Candida in the gut, most people’s first instinct is to kill, kill, kill. In the case of an acute infection, this is totally understandable, and this is where tools like probiotics and antimicrobial herbs can be very helpful. For some people, prescription antifungal drugs may be necessary as well. 

However, many people experience a Candida infection as a recurring issue brought on by certain eating patterns, hormonal shifts, or even stress. In these cases, a “kill first, ask questions later” approach isn’t going to resolve the issue permanently. 

We have to ask ourselves why the Candida infection keeps returning. Is there another underlying gut infection, such as a parasite or bacterial infection, that could be instigating Candida? Are there hormone imbalances, such as estrogen dominance, that could be contributing to a yeast overgrowth? Is a high-sugar or high-carbohydrate diet causing blood sugar imbalances that fuel Candida to grow out of control?

When we can address these deeper issues and return homeostasis to the body, Candida should naturally stay in its own lane. 

Addressing the Root Cause of Candida Overgrowth

Finding the root cause of Candida overgrowth can be challenging to do on your own, and having the outside perspective of an experienced clinician can be really helpful. If you’re interested, we’d be happy to help you figure out what’s going on at the Ruscio Institute for Functional Health. But in the meantime, let’s review some popular root causes of Candida overgrowth and what you can do about them. 

Probiotics for Candida

One reason Candida might get out of control is a lack of beneficial gut bacteria in your digestive tract. Most people are susceptible to this issue just from the consequences of modern life, including pesticide exposure, stress, and lower food quality. This is where a multi-species probiotic can be helpful to begin to restore good bacteria to the gut 7 8 9 10. 

At the Ruscio Institute, we’ve pioneered a probiotic “stack” we call Probiotic Triple Therapy. It combines the three types of probiotics—a Lactobacillus and Bifidobacteria blend, a soil-based probiotic, and a beneficial yeast called Saccharomyces boulardii. This combination has proven to be highly effective, even for those who haven’t had success with probiotics in the past. 

But if you’re brand new to probiotics, you could start with a lacto-bifido blend probiotic on its own and see if you notice any change in your symptoms. 

Antifungal Supplements for Candida

Probiotics are antifungal themselves, but sometimes additional antimicrobial herbs pack that extra punch to reduce Candida and work on any other underlying gut dysbiosis that could be causing candidiasis 11 12 13 14. 

A few antimicrobial herbs I like to use include: 

• Oregano
• Berberine
• Artemisia (sweet wormwood)
• Black walnut
• Uva ursi
• Barberry root
• Caprylic acid
• Olive leaf

These are just a few examples of antimicrobial herbs that can help treat a variety of pesky gut microbes.

We created a series of powerful yet gentle antimicrobial blends called Biota Clear that we use in our clinic to great effect. In most cases, I recommend adding antimicrobials after adapting to an anti-inflammatory diet and adding probiotics to heal the gut. Often, diet and probiotics will clear up symptoms, but sometimes an antimicrobial intervention is necessary.  

Stress

A stressful lifestyle can contribute to an overgrowth of Candida in the gut or to dysbiosis in general 15 16 17. Stress is a root cause that often goes overlooked, but it’s important to address and reduce stress wherever possible. Some effective stress reducers are practices like meditation 18 19 or yoga, or spending more time in nature 20. 

Exercise, even something as simple as a daily walk, is also a potent stress reliever 21 and has circulatory and metabolic benefits to boot. Feeding two birds with one scone, as they say!

Adaptogenic herbs can also help even out your body’s stress response and take some pressure off your adrenals and nervous system 22 23 24. 

Candida Diet

I’m a big proponent of diets that aren’t too restrictive while supporting to your personal health goals. To reduce the overgrowth of Candida, that may mean reducing processed sugar and carbs if they are currently a big part of your diet, but it doesn’t have to mean eliminating certain foods forever. For example, when you’re healthy and feeling good, I want you to have cake on your birthday! But cake every day is probably not a great idea.

Some people will find that a strategy like the low-FODMAP diet will temporarily help with their symptoms, but the goal is always to reintroduce nutrient-rich foods when your gut health is in a better place to accept them. The Paleo diet also makes a lot of sense for anyone trying to improve their gut health and reduce Candida. 

Don’t Make Candida Your Enemy if You Don’t Have To 

What if your goal wasn’t just to kill Candida but to make your gut a place where Candida and the rest of your microbiome can coexist peacefully? I find that this perspective and approach to creating a healthy gut environment makes for a less stressful, more nuanced experience in healing the gut. You might even find healing strategies you wouldn’t have considered before.

If you’re curious to know my full process for healing your gut, you can check out my book Healthy Gut, Healthy You.

The Ruscio Institute has developed a range of high-quality formulations to help our clients and audience. If you’re interested in learning more about these products, please click here. Note that there are many other options available, and we encourage you to research which products may be right for you. The information on DrRuscio.com is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment.