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Thomas O’Bryan

Ask Dr. Tom: Real Talk. Root Cause.

A monthly live Q&A with Dr. Tom O’Bryan to get clear, science-backed answers to your health questions—without the fluff.

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Imagine This...

You have a question about your gut, your brain, your hormones, or that test result your doctor brushed off—and instead of scrolling endlessly through wellness blogs, you get a straight, science-backed answer from someone who’s been doing root-cause medicine for over 40 years.
That’s what Ask Dr. Tom is all about.
Each month, Dr. Tom O’Bryan opens the line for a live, no-script, ask-me-anything session on the health topics that matter most to you.

What You Get:

  • Monthly LIVE 60-minute Zoom Q&A with Dr. Tom
  • Replay access (because life happens)
  • Ask your question in advance (even if you can’t make it live!)
  • Bonus: Access to the full Q&A library so far (new!)
  • And you’ll also hear some incredible insights and stories—because Dr. Tom is one of the best storytellers out there
  • 15% DISCOUNT on all of our Private Label supplements and Sun Horse Energy products

Topics we cover:

Gut health & leaky gut

Brain fog, memory & cognition

Hormones, thyroid & autoimmunity

Mold, mycotoxins, parasites & hidden infections

Histamine issues, inflammation, fatigue, and so much more

Why Join?

Because Googling symptoms is exhausting. Because you’re tired of guessing. Because you want to understand the why behind the what.
Whether you’re just starting your healing journey or deep in it, this monthly Q&A will give you insights, direction, and real-time support from someone who’s trained thousands of practitioners and helped tens of thousands of patients.
All for just $97/year. That’s less than $8/month to have direct access to one of the most trusted voices in Functional Medicine.

Frequently Asked Questions

No worries—every session is recorded, and you can submit your question ahead of time!

Yes! The more specific, the better. Dr. Tom can’t be your personal physician, but he can offer insights, guidance, and point you in the right direction.

Not at all. If you’re curious, motivated, and want better health—you’re in the right place.

Real Talk. Real Healing. Real Access.

Join Dr. Tom for honest answers, deep insights, and the kind of connection you won’t find in a Google search.

Join Ask Dr. Tom for $97/year

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Coriolus Versicolor

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Coriolus Versicolor, a remarkable mushroom, is esteemed for its potential to contribute to overall wellness. Known for its immune-supporting properties, Coriolus Versicolor may help strengthen the body’s natural defenses. This extraordinary mushroom has also been associated with promoting healthy energy levels, supporting digestion, and fostering vitality.

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Fo Ti

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Fo Ti, a revered Chinese herb also known as He Shou Wu, is valued for its potential to support overall wellness. Traditionally used for promoting vitality and longevity, Fo Ti may contribute to maintaining healthy energy levels, cognitive function, and immune system performance. This remarkable herb has also been associated with supporting liver and kidney health, as well as fostering a sense of overall balance

Agave

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Agave, a versatile desert plant native to the Americas, is recognized for its potential to support overall wellness. Rich in natural fibers and low-glycemic sweeteners, Agave may contribute to maintaining healthy blood sugar levels, digestive health, and providing a natural alternative to refined sugars.

Maral Root

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Maral Root, a potent adaptogenic herb native to Siberia, is celebrated for its potential to contribute to overall well-being. Known for helping the body manage stress and maintain balance, Maral Root may also promote healthy energy levels, endurance, and cognitive function. This exceptional herb has been associated with supporting the immune system, fostering vitality, and enhancing physical performance.

  • Antioxidant and DNA Repair Stimulating Effect of Extracts from Transformed and Normal Roots of Rhaponticum carthamoides against Induced Oxidative Stress and DNA Damage in CHO Cells:https://pubmed.ncbi.nlm.nih.gov/27034736/

NotoGinseng

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NotoGinseng, a distinct variety of Panax ginseng native to the Changbai Mountains, is esteemed for its potential to contribute to overall well-being. Renowned for its adaptogenic properties, Noto Ginseng may help the body manage stress and maintain balance. This exceptional herb has been linked to supporting cognitive function, promoting healthy energy levels, and boosting immune system performance.

Baicalin

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Baicalin, a potent bioflavonoid derived from the Scutellaria baicalensis plant, is appreciated for its potential to promote overall wellness. With its antioxidant and anti-inflammatory properties, Baicalin may help protect cells from oxidative stress and maintain a balanced response to inflammation. This remarkable compound has been associated with supporting liver health, promoting cardiovascular function, and fostering a sense of vitality.

Purple Lapacho

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Purple Lapacho, a unique and potent herb, is valued for its potential to support overall well-being. Known for its immune-boosting properties, Purple Lapacho may help fortify the body’s natural defenses. This remarkable herb has also been associated with promoting healthy energy levels, supporting digestion, and fostering vitality.
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Holy Basil

Holy Basil has been found to protect organs and tissues against chemical stress from industrial pollutants and heavy metals, and physical stress from prolonged physical exertion. It has also been shown to counter metabolic stress through normalization of blood glucose, blood pressure and lipid levels.

Ashwagandha

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Ashwagandha, a revered adaptogenic herb, is acclaimed for its potential to support overall well-being. Known for helping the body manage stress and maintain balance, Ashwagandha may also contribute to healthy energy levels and mental clarity. This remarkable herb has been associated with promoting relaxation, supporting the immune system, and fostering vitality.

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Guarana

Guarana, a powerful plant, is celebrated for its potential to support overall wellness. Rich in natural caffeine, Guarana may help promote mental alertness, focus, and healthy energy levels. This remarkable plant has also been associated with supporting endurance and enhancing physical performance.

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Catuaba

Catuaba, a potent herb, is appreciated for its potential to contribute to overall well-being. Known for its adaptogenic qualities, Catuaba may help the body cope with stress and maintain balance. This remarkable herb has also been associated with promoting mental alertness, healthy energy levels, and fostering a sense of vitality.

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Reishi Mushroom

Reishi Mushroom, a highly-regarded fungus, is esteemed for its potential to enhance overall wellness. With adaptogenic properties, Reishi Mushroom may help the body manage stress and maintain balance. This extraordinary mushroom has also been linked to promoting immune system support, healthy energy levels, and fostering a sense of calm and relaxation.

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Astragalus Root

Astragalus Root, a powerful herb, is respected for its potential to contribute to overall well-being. Renowned for its immune-supporting properties, Astragalus Root may help fortify the body’s natural defenses. Additionally, this remarkable root has been associated with promoting healthy energy levels, heart health, and supporting the body’s ability to adapt to stress.

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Asian Licorice Root

Asian Licorice Root, a versatile herb, is valued for its potential to support overall wellness. Known for its adaptogenic properties, it may help the body cope with stress and maintain balance. This remarkable root has also been linked to promoting healthy digestion, respiratory function, and supporting the immune system.

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American Ginseng

American Ginseng, a revered herb, is prized for its potential to contribute to overall well-being. With adaptogenic properties, it may assist the body in managing stress and maintaining harmony. American Ginseng has also been associated with promoting mental alertness, healthy energy levels, and supporting the immune system.

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Rhodiola Rosea

Rhodiola Rosea, a robust herb, is admired for its potential to support overall wellness. As an adaptogen, Rhodiola Rosea may help the body cope with stress and maintain balance. This remarkable herb has been linked to promoting mental clarity, healthy energy levels, and increased endurance.

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Peruvian Maca

Peruvian Maca, a nutrient-packed root, is celebrated for its potential to enhance overall well-being. Known for its adaptogenic qualities, Maca may help the body manage stress and maintain balance. This powerful root has also been associated with promoting healthy energy levels, endurance, and supporting hormonal balance.

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Schisandra Fruit

Schisandra Fruit, a unique berry, is renowned for its potential to contribute to overall wellness. Boasting adaptogenic properties, it may help the body adapt to stress and maintain equilibrium. Schisandra Fruit has also been linked to promoting healthy energy levels, mental clarity, and supporting the body’s natural defense

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Acai

Acai, a nutrient-dense berry, is recognized for its potential to enhance overall well-being. Rich in antioxidants, Acai may help support the body’s defenses against environmental stressors, while promoting healthy energy levels and vitality.

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Himalayan Goji

Himalayan Goji, a nutrient-rich fruit, is valued for its potential contribution to overall wellness. This superfood is believed to support the immune system, promote healthy energy levels, and aid in maintaining balance within the body. With its antioxidant properties, Himalayan Goji may help protect cells from environmental stressors.

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Gotu Kola

The main group of components in gotu kola is the triterpenes including asiaticoside, madecassoside, asiatic acid, and madecassic acid, which have antioxidant and anti-inflammatory properties that are shown to positively influence brain plasticity which means a much sharper you.

  • Exhibits significant wound healing ability, Improves microcirculatory parameters, Sedative and anxiolytic properties, Antidepressant, Re-vitalize the brain and nervous system, increase attention span and concentration and combat aging: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3116297/
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Water Hyssop

Best known as a neural tonic and memory enhancer this powerful herb increases cerebral blood flow and neurotransmitter modulation.

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Green Tea Extract

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Healthy energy producer and one of the more researched and promising supplements. It upregulates fat metabolism at rest and during exercise. In recent years the consumption of Green Tea Extract has shown to help prevent lifestyle diseases like cardiovascular disease because of it’s preventative effects on chronic inflammation.

  • Helps with weight loss by increasing a protein hormone which is involved in regulating glucose levels as well
    as fatty acid breakdown:https://pubmed.ncbi.nlm.nih.gov/26093535/
  • Decrease cholesterol absorption and plasma levels, has strong free radical-scavenging
    activity inhibiting LDL oxidation, reduce the adhesion molecule expression, has antitrombotic activities by inhibiting platelet aggregation:https://pubmed.ncbi.nlm.nih.gov/15969262/ 
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Mikania Guaco

“Guaco” is Sun Horse Energy founder Dan Moriarty’s favorite herb, and the reason why he’s still alive. Traditionally, it’s a well-known herb for snake bites, scorpion stings and other venomous creatures. Guaco acts as a non-steroidal bronchodilator, meaning it opens up the airways without steroids. As a result of guaco opening up the airways, the alveoli (tiny air sacs in the lungs) are better able to accept oxygen transfer and get rid of carbon dioxide. In Brazil, Guaco syrup is one of the most popular herbal medicines used to treat the symptoms of asthmatic bronchitis, cough and hoarseness.


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Osha Root

A traditional Native American herb, Osha is also known as “Bear Root”. Native Americans noticed that when bears emerged from hibernation, the first thing they did after being in a state of torpor for 4 months was not feast on salmon or drink water, but rather, dig up osha and eat it. Why? It decongests and wakes up the lungs. Native Americans who used Osha were able to run further, and treat their colds and congestion. Modern research studies suggest Osha may support the immune system by offering protective effects against oxidative damage.

I want to thank you for your existence. I want you to know that functional medicine has changed my life, well the life of my autistic son. So much so that I plan on taking the Functional Medicine Health Coach Certificate and work with my new friend who is now a Functional Medicine Doctor from the Institute of Functional Medicine and spread the word on GI testing and how finding the underlying issues will help eliminate autistic traits. 

I hope to be able to meet you one day so I can share this great news with others. Changing my son’s diet has changed him. Food is medicine!! By the way, I’m cooking my rutabaga. I’m Italian and never grew up with these. With love.

Rita Mastrangelo

I found you on YouTube a couple of weeks ago and I’m hooked. I listen to you a couple of hours every morning. I am being tested for celiac disease and have been gluten-free for a couple of weeks. Thank you for all of your insight.

April Renee

Just wanted to tell you that you’re amazing! You are helping so many people all over the world! Including me! Thank you so very much, Dr. Tom O’Bryan!

Patricia Puddle

Good morning Dr. Tom, Would just like to say thank you! This time last year I was going through a hell of a time with my gut. Terrible indigestion on a regular basis, feeling as if I had eaten a boulder and the tiredness was doing my heed (scottish for head) in! With two young girls being tired is not an option!

I went to the doctors on a number of occasions and they decided to prescribe omeprazole to mask the problem, sorry help my problem. I decided taking these drugs was not an option for me! So I started googling the life out of it!! Low and behold you started popping up!! Oh and Gluten intolerance! 

Your advice has been second to none! You have in my case really simplified what gluten does to my body and now that I have cut it out (which as it appears in lots of foods, some I can’t understand) I have found that my symptoms very quickly reduced and now I’m a year down the line they have gone for the vast majority of the time!! For that I’m truly grateful. I now follow you on YouTube and Instagram, which continues to educate me and the importance of gut health. I look forward to your future advice. Yours faithfully,

Gary Christie

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Black Ant Extract

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A Chinese medicine tonic, Black Ant is used to support energy levels. (In traditional Chinese medicine, Black Ant is given to increase vital Qi.) Research studies demonstrate that Black Ant supports the function of the thymus gland, which plays a crucial role in the immune system, producing and activating lymphocytes.

Siberian Ginseng

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This well known adaptogen has been proven to reduce cardiovascular stress, lower and stabilize blood sugar to healthy levels, and encourages a more efficient lipid metabolism.

Pine Bark Extract

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Many studies have shown that pine bark possesses anti-aging properties. It’s very similar in nature to the well-known antioxidant and anti-inflammatory compound, resveratrol, which is abundant in red wine and grapes. Pine bark has a proven beneficial effect on lipids, the cardiovascular and immune systems.

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Lion's Mane

A very yummy and medicinal mushroom is a well established candidate for brain and nerve health because it triggers neurite outgrowth and regenerates damaged nerves. Lions Mane has been extensively studied for its neuro-health properties.

Nattokinase

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This is an enzyme/protein that speeds up biochemical reactions and helps to prevent and dissolve the formations of blood clots (thrombi); addresses the problem of blood hyperviscosity, thereby preventing thick and sticky blood, which is not conducive to overall cardiovascular health.

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Shatavari

Referred to as the women’s ultimate power herb, by some herbal enthusiasts. Used in India for at least 3,000 years, Shatavari, is structurally similar to estrogen produced within the body. Some researchers have concluded shatavari can be a highly effective alternative to synthetic hormone replacement therapy for peri- and menopausal women.

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Chaste Tree Berry

Improve female libido, mitigate PMS, reproductive health

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Horny Goat Weed

Increase para-sympathetic nervous activity, mitigate osteoporosis, improve libido, enhance smooth muscle tissue function

  • Treatment for erectile problems and nerve injuries in human patients:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3551978/
  • Prevents thickening or hardening of the arteries through multiple mechanisms, including attenuating DNA damage, correcting endothelial dysfunction, inhibiting the proliferation and migration of smooth muscle cells, repressing macrophage-derived foam cell formation and inflammatory responses, as well as preventing platelet activation:https://pubmed.ncbi.nlm.nih.gov/29075193/
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Bulgarian Tribulus

Enhance athletic performance, improve circulation, improve sexual performance, more efficient rates of protein synthesis

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Cordyceps

Cordyceps, a genus of mushroom, gained lots of attention after Chinese long-distance runners performed impressively at international competitions in the 1990s and early 2000s. Along with high-altitude training, supplementing with cordyceps was part of their intense training program. A research study concludes that cordyceps improves tolerance to high-intensity exercise after supplementation with it because the fungus is thought to increase blood flow, enhance oxygen utilization; it also acts as an antioxidant. It also has powerful anti-tumor properties, the ability to regulate the endocrine system, enhance your immune function, and protect the kidneys, lung, liver, and other organs.

  • Immunomodulatory, antitumor, anti-inflammatory, and antioxidant activities, promotion of endurance capacity, and learning-memory improvement, can be used to treat conditions such as hyposexuality, night sweats, hyperglycemia, hyperlipidemia, asthenia, arrhythmias, and other heart, respiratory, renal and liver diseases: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3924981/
  • Various pharmacological actions, including nephroprotective, hepatoprotective, anti-inflammatory, antioxidative, and antiapoptotic effects:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4849494/
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Ginkgo Biloba

In recent decades, an extract of the leaves of the tree Ginkgo biloba L. has been used to improve memory in disorders like Dementia disorders that affect memory and intellectual functioning, and are caused primarily by Alzheimer’s disease and vascular disorders.

  • Potent antioxidant properties and ability to enhance peripheral and cerebral circulation, ginkgo’s primary application lies in the treatment of cerebrovascular dysfunctions and peripheral vascular disorders:https://pubmed.ncbi.nlm.nih.gov/11565403/
  • Experimental results showed extracts of G.Biloba to upregulate protein expressions of BDNF:
  • The effects of Ginkgo biloba extract on cognitive functions in aged female rats;
  • The role of oxidative stress and brain-derived neurotrophic factor: https://www.ncbi.nlm.nih.gov/pubmed/25446810
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Jiaogulan

Jiaogulan, a versatile herb, is celebrated for its potential to support overall well-being. Known for its adaptogenic properties, Jiaogulan may help the body cope with stress and maintain balance. This remarkable herb has also been associated with promoting healthy energy levels, boosting endurance, and fostering a sense of calm and relaxation.