Undecanoic Acid – Undecylenic Acid
Undecanoic acid, also known as undecylenic acid, is a naturally occurring fatty acid with well-documented antifungal properties. It is used as a targeted nutritional support in cases of Candida and other yeast overgrowth. Undecylenic acid is considerably more potent than, for example, caprylic acid when it comes to inhibiting Candida, and is regarded as one of the most effective natural fatty acids against fungal overgrowth.
Undecylenic acid helps counteract the growth of several Candida species, including Candida albicans, Candida glabrata, Candida tropicalis, Candida parapsilosis and Candida krusei. It is also active against other yeasts and moulds. An important mechanism is its ability to inhibit Candida albicans morphogenesis, meaning it prevents the transition from yeast form to hyphal form (mycelial growth). It is this invasive form that enables the fungus to adhere more firmly to the mucous membranes and cause more pronounced symptoms.
A balanced and well-functioning gut microbiota is crucial for nutrient absorption, immune function and detoxification. Antibiotics, corticosteroids, prolonged stress, high sugar intake and ultra-processed foods can disrupt the microbiota and create an environment in which Candida is able to proliferate unchecked. When yeast takes over, it may contribute to symptoms such as bloating, gas, skin issues, recurrent fungal infections and persistent fatigue.
Fatty acids with antifungal properties, such as lauric acid, caprylic acid and particularly undecanoic acid, act by disrupting the structure of the fungal cell membrane and thereby impairing its survival. Undecanoic acid occurs naturally in small amounts in the body, including in sweat, where it contributes to the skin’s natural defence against fungal overgrowth.
Undecylenic acid should be combined with a comprehensive approach: dietary changes, support for the gut microbiota and optimisation of immune function. Reducing or eliminating refined sugar, rapidly absorbed carbohydrates, ultra-processed foods and industrial seed oils (with the exception of olive oil) is an important part of the strategy. A diet rich in nutrient-dense whole foods, natural fats and adequate protein creates a less favourable environment for yeast.
An effective combination in cases of Candida may include Undecylenic Acid, Candida Control Plus+, Flora Plus+, Saccharomyces boulardii, Olive Leaf Extract, Resveratrol Veri-te™, Vitamin D3 with K2, MSM and Vitamin C Whole Food. Probiotics help restore microbial balance, Saccharomyces boulardii supports barrier function and competes with yeast, olive leaf extract has antimicrobial activity, and vitamin D helps regulate immune function. MSM and vitamin C support detoxification and mucosal integrity.
I have vaginal thrush after a course of antibiotics. What should I do?
Following antibiotic treatment, it is common for the protective bacterial flora to be reduced, allowing Candida to proliferate. To counteract this, a broad and consistent approach is required, sometimes for several months. Symptoms may temporarily worsen during seasonal changes or periods of high stress.
- Reduce or eliminate refined sugar, white flour (bread, pasta), snacks, agave syrup, ultra-processed foods and industrial seed oils (olive oil excepted).
- Support the body with the following supplements:
- Undecylenic Acid: 4 capsules daily on an empty stomach, divided into 2 capsules twice daily. Take separately from probiotics.
- Candida Control Plus+: 2 capsules daily with a meal.
- Flora Plus+: 1 capsule daily with a meal.
- Saccharomyces boulardii: 1 capsule daily 30 minutes before a meal.
- Olive Leaf Extract: 1 capsule daily with a meal.
- Resveratrol Veri-te™: 1 capsule daily.
- Vitamin D3 with Vitamin K2: 2 capsules daily with a meal.
- MSM: 1 capsule daily with a meal.
- Vitamin C Whole Food: 1 capsule daily with a meal.
I have heard that MSM is beneficial for Candida?
MSM (methylsulfonylmethane) is used by many practitioners as supportive care in cases of Candida. Organic sulphur is important for detoxification processes and connective tissue function, and some clinicians find that MSM may help create a less favourable environment for yeast while supporting the recovery of the mucous membranes.
I drink flaxseed oil – is that acceptable if I have Candida?
Flaxseed oil is not an optimal source of active omega-3. It contains alpha-linolenic acid (ALA), which the body converts only to a very limited extent (approximately 1–5%) into the biologically active forms EPA and DHA. To achieve adequate levels, very large amounts of flaxseed oil would be required. In addition, flaxseed oil contains significant amounts of omega-6, which many people already consume in sufficient quantities through their diet.
It is more effective to obtain EPA and DHA directly from oily fish or fish oil derived from fish low down the food chain. A balanced omega-3 status may help reduce low-grade inflammation and support mucosal recovery.
Formula SF722 for Candida from Thorne
We have discontinued Formula SF722 from Thorne due to quality concerns. Greatlife’s pure Undecylenic Acid replaces SF722.
Free Candida Protocol
We offer a comprehensive and entirely free protocol for Candida and other fungal overgrowth, developed to provide you with a clear, structured and effective strategy from the outset. You can receive it directly from us. Please contact our customer service at [email protected] and we will send it to you promptly.
