Myristic Acid

Myristic acid is a saturated fatty acid with 14 carbon atoms in its chain. It occurs naturally in many plant and animal fats, including nutmeg, coconut oil, and palm oil, making it a common component of foods and cosmetics. In skincare formulations, it typically functions as a cleanser, emulsifier, or fragrance component.As a fatty acid, myristic acid has a hydrophobic (water-repelling) character, which allows it to interact with oils and help lift impurities from the skin surface. It also helps stabilise formulations by allowing oil and water phases to mix effectively.

As a fatty acid, myristic acid works primarily through its structure: one end attracts oils and the other attracts water. This dual affinity makes it an effective emulsifier, allowing formulas to maintain a stable texture and for cleansing agents to suspend oil-soluble debris so it can be rinsed away.Laboratory studies indicate myristic acid may also have anti-inflammatory properties, potentially through mechanisms involving immune cell signalling. However, most of this evidence comes from laboratory models rather than direct human skin studies, so the real-world benefit in skincare product…

Myristic acid is typically incorporated by manufacturers into cleansing products and emulsions rather than used as a standalone ingredient by consumers. If using a product containing it, follow the product instructions. As with any cleanser or emulsion, patch test if you have sensitive or reactive skin, particularly if you are prone to fungal acne, as some individuals find saturated fatty acids can trigger breakouts.

Myristic acid is generally well-tolerated and has a long safety history in food and cosmetics. In pure form it may cause irritation to skin and eyes under direct exposure, but concentrations in formulated products are unlikely to cause this. Some individuals with acne-prone or fungal acne-prone skin may find saturated fatty acids trigger breakouts.