C15 supplement side effects
C15 supplement side effects
What Is C15 Fatty Acid?C15 fatty acid, also known as pentadecanoic acid, is a saturated fatty acid with a chain of 15 carbon atoms. It is classified as an odd-chain saturated fatty acid, a rare group in the human diet. C15 is found naturally in whole-fat dairy products such as butter, cheese, milk, and yogurt, as well as in trace amounts in some fish and plants. Unlike common saturated fats like palmitic acid, C15 has unique structural properties that researchers believe may influence cellular health, mitochondrial function, and inflammation pathways.Proposed Benefits and Current EvidenceProponents of C15 supplements suggest that this fatty acid may support cell membrane stability, activate AMPK, inhibit mTOR, and reduce inflammation. These mechanisms have led to claims of improved metabolic health, liver health, red blood cell integrity, and healthy aging. However, the evidence base is still preliminary. Observational studies link higher dairy fat intake with lower risks of type 2 diabetes and NAFLD, but these do not prove causation. The only major human trial, the TANGO study, showed promise for liver fat reduction but was small and industry-funded. Independent replication and long-term safety data are lacking.Food Sources, Safety, and Supplement GuidanceFor most people, whole-fat dairy foods are the most practical way to obtain C15. Butter, full-fat cheese, and whole milk contain meaningful amounts, while Greek yogurt provides about 10–20 mg per serving. The typical supplement dose is 100 mg daily, and C15 is GRAS-recognized by the FDA at intended use levels. Reported side effects are mild and include digestive discomfort. Because long-term safety data is absent, it is wise to consult a healthcare provider before supplementing, especially if you are pregnant, nursing, on medication, or have a medical condition. C15 is not the same as omega-3; it is a saturated fat with different functions, and the two may complement each other rather than compete.