Shea butter possesses intriguing properties for preventing the appearance of brown spots. Rich in vitamin E, shea butter is a natural antioxidant. It is capable of donating an electron to a free radical without becoming unstable. The free radical is stabilised, less reactive and the oxidation cascade of molecules is halted. This is beneficial in preventing oxidative stress.
Triterpenic alcohol cinnamate esters, the main component of the unsaponifiable fraction of shea butter, have a high absorption of UV rays between 250 and 300 nm. When added to a sunscreen, they synergistically increase the absorption of UVB rays. It is these UV rays that are responsible for the development of free radicals. However, studies have shown that this triterpene fraction only provides a low sun protection factor: a SPF of 4. Daily application of shea butter on the skin, before sunscreen, will protect it from UV rays and limit the appearance of brown spots. In addition, its antioxidant properties help to prevent oxidative stress.
Shea butter also has additional defences against UV rays. It nourishes the skin and maintains a healthy epidermis. Thanks to this, the epidermis establishes its hydrolipidic barrier, which protects it from external aggressions and limits the formation of brown spots.
When brown spots disappear, they can reappear at any time, especially after exposure without sun protection. Shea butter is recommended for daily skin care. Completely natural, this ingredient is gentle and tolerated by all skin types. It is particularly recommended for dry or mature skin.