Caprylic Acid
A medium-chain fatty acid with antifungal and antibacterial properties.
Also known as: Octanoic Acid • C8
Overview
Caprylic acid, also known as octanoic acid, is a medium-chain triglyceride (MCT), a type of saturated fatty acid found naturally in coconut oil, palm kernel oil, and the milk of humans and other mammals. It is valued for its potent antimicrobial properties, particularly its ability to combat fungi and yeast, such as Candida albicans. This has made it a popular supplement for supporting a healthy balance of microflora in the gut. The mechanism behind its antifungal action involves its ability to disrupt the cell membranes of yeast, causing them to die off. In addition to its role in gut health, caprylic acid is also a ketogenic fatty acid, meaning it is efficiently converted into ketones by the liver. Ketones can serve as an alternative energy source for the brain and body, which is why caprylic acid is often included in ketogenic diet supplements to help boost energy levels and mental clarity. Some research also suggests that caprylic acid may have anti-inflammatory and antibacterial benefits, potentially helping with skin conditions like acne and digestive issues. It is typically sold in capsule or softgel form, often combined with other supportive nutrients for gut health.
Key Benefits
Antifungal and Anti-Yeast
Caprylic acid is effective at disrupting and killing Candida albicans and other yeast, helping to restore a healthy microbial balance in the gut.
Supports Ketogenic Diets
As a C8 MCT, it is rapidly converted into ketones, providing a quick source of energy for the brain and body, and supporting a state of ketosis.
Promotes Digestive Health
By helping to control harmful bacteria and yeast, caprylic acid can reduce inflammation and support overall digestive function.
Dosage & How to Take
It is best to start with a low dose and gradually increase to assess tolerance.
| Purpose | Dose | Notes |
|---|---|---|
| Candida Support | 1000-2000 mg | Taken in divided doses with meals, often as part of a broader antifungal protocol. |
| Ketogenic Support | 1-2 tablespoons of C8 MCT oil | Used as a source of quick energy. |
Best Time to Take
Take with meals to minimize the risk of gastrointestinal side effects.
With or Without Food
Recommended to be taken with food.
Forms & Bioavailability
| Form | Absorption | Best For | Notes |
|---|---|---|---|
| Capsules/Softgels | High | Targeted delivery to the gut, especially delayed-release formulas. | The most common form for antifungal use. |
| MCT Oil (C8) | High | Quick energy and ketone production. | Often used in coffee or smoothies. |
Side Effects & Safety
Common
- Nausea
- Stomach upset
- Diarrhea (especially at high doses)
Rare
- Headache
Contraindications
- Liver disease (as MCTs are metabolized by the liver)
Interactions
No significant interactions have been reported.
Scientific Research
In vitro antimicrobial properties of coconut oil on Candida species in oral isolates
Coconut oil, which is rich in caprylic acid, was shown to be effective against Candida albicans.
Medium Chain Triglyceride (MCT) oil affects the immunophenotype via repolarization of macrophages
MCTs, including caprylic acid, have been shown to have anti-inflammatory effects.
Food Sources
Products With Caprylic Acid
4 products in our database contain this ingredient
Frequently Asked Questions
Medical Disclaimer
This content is for educational and informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen, especially if you have pre-existing health conditions or are taking medications. The statements on this page have not been evaluated by the Food and Drug Administration.