Caprylic/capric triglycerides, commonly known as medium-chain triglyceride (MCT) oil, consist almost entirely of C8 and C10 fatty acid glycerol esters. In creams, they serve as effective emollients, providing a medium spreading profile for easy application and a smooth skin feel, as well as strong polarity that enhances the dissolution of oil-soluble actives. Their medium water permeability helps the skin retain moisture while still allowing it to breathe, unlike petrolatum, which completely seals the skin.
Caprylic/capric triglycerides are highly stable against oxidation because their structure contains no double bonds. Their medium-length fatty acid chains keep them liquid even at 0 °C. MCT oil is soluble in most common organic solvents and miscible with natural oils in all ratios, but it is not soluble in water or glycerin. This emollient is suitable for both hot and cold processing and remains stable across a pH range of 4–7.
In topical products, it functions as a carrier, enhancing the delivery of active ingredients such as vitamins through the skin’s lipid barrier due to its high penetration ability. Within the body, caprylic/capric triglycerides are rapidly metabolized and do not accumulate as body fat.
MCT oil is a gentle, skin-loving ingredient used in many personal care products, including body lotions and oils, facial creams, hair care, aftershaves, lip care products, and makeup removers. Its light, non-greasy feel leaves skin soft and smooth while helping to relieve dryness and itchiness.
