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Undecylenic Acid

Undecylenic Acid by Thorne offers fatty acid support for a healthy balance of gut and vaginal flora.


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Undecylenic Acid

The most potent of the fatty acids – Undecylenic Acid by Thorne is clinically shown to be effective in maintaining a healthy balance of gastrointestinal and vaginal flora.

Ingredient Information

Geometric Shape

Key Ingredients

Ingredient Amounts

Serving Size: 5 Gelcaps
Servings Per Container: 50
Name Amount
Undecylenic Acid 250 mg
Other Ingredients: Extra Virgin Olive Oil, Gelatin (Bovine), Purified Water and Glycerin (Vegetable Source) Gel Cap

How to Use

Take 5 gelcaps two to three times daily or as recommended by one of our health coach professionals.

Is Undecylenic Acid right for you?

Related test Gut Health Test with Microbiome Wipe
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Thorne’s Gut Health Test provides a detailed analysis and a personalized plan that targets your GI discomfort to optimize wellness. Learn how to create meaningful changes in your gut’s microbiome with the combination of cutting-edge sequencing and patent-pending wipe technology that makes the sample collection process simple.

Undecylenic Acid Details

Maintaining a healthy balance of gut flora is a key component of overall health. Studies going back 50 years demonstrate that fatty acids are effective in supporting a healthy gut flora. The undecylenic acid in Thorne’s is six times more effective than caprylic acid. Its efficacy has helped make this product one of Thorne’s best-selling products for more than two decades.

Benefits of Thorne’s Undecylenic Acid: 

  • Promotes optimal functioning of the gastrointestinal tract.
  • Vital to the absorption of nutrients, the elimination of waste, and proper immune function.
  • In women’s health, the relationship of a healthy balance of gut flora has corresponding benefits for vaginal flora.
  • Supplementing with Undecylenic Acid helps maintain a healthy balance of the microorganisms that live in the gastrointestinal tract that can be out of balance due to an unhealthy diet, inadequate digestive enzymes, oral contraceptive use, or taking various prescription and OTC drugs.
  • Six times more effective than caprylic acid.


Allergy Warning

This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.


If pregnant, consult your health professional before using this product.


There are no known adverse interactions or contraindications at publication date.

Other Warnings

It is not recommended to remove the liquid from the capsule to take orally, as it can be irritating to the oral mucosa.



Our Mission

We believe personalized, scientific wellness can extend the duration of one's health span, create happier and healthier lives, and feel one’s best at every age and life stage. Our ambition is to empower individuals to live healthier for longer through personalized, scientific testing and solutions. With a deep portfolio of personalized offerings – testing that provides individualized data, educational resources, and products that support specific health goals and needs – Thorne is here at every age and life stage. Thorne is redefining what it means to live healthier for longer.

How we know our supplements work

At Thorne, being able to rely on the safety and efficacy of our nutritional supplement products is the motivating force behind our clinical trials program. Our confidence that each product we formulate and manufacture works in the body comes from extensive clinical research and medical literature that substantiate the presence of each ingredient in each formula. In addition to confirming the safety of our products, clinical research helps us better understand their efficacy. And it paves the way for new discoveries. The ultimate goal of our research partnerships is to help us fulfill our mission of solving the biggest challenges in health and wellness.
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