Ascorbyl Stearate

Ascorbyl Stearate is a derivative of ascorbic acid (vitamin C) combined with stearic acid, a fatty acid. This combination makes it more stable than pure ascorbic acid, which tends to degrade quickly when exposed to air, light, and moisture. The ingredient functions as an antioxidant in skincare formulations.Like other ascorbic acid derivatives, ascorbyl stearate is designed to protect skin from oxidative stress—damage caused by free radicals from environmental sources such as UV radiation and pollution.

Antioxidant. Reduces Redness

Ascorbyl Stearate works by donating electrons to free radicals, effectively neutralising them before they can damage skin cells. This antioxidant action helps prevent oxidative stress, which is implicated in photoageing and inflammatory skin conditions.The stearic acid component serves a dual purpose: it stabilises the vitamin C molecule, allowing it to remain effective in a formulation for longer, and it can provide mild occlusive properties that support the skin barrier.

Ascorbyl stearate is typically found in serums, creams, and moisturisers. As with any antioxidant product, consistency is important; use as directed on the product label, usually once or twice daily. It can be layered under sunscreen during the day or used as part of an evening routine. If introducing a new vitamin C product, start gradually to allow your skin to adjust.

Ascorbyl stearate is generally well-tolerated and considered safe for cosmetic use. Those with sensitive skin or known sensitivities to ascorbic acid derivatives should patch test first.