Vitamin C is one of the most popular assets in aesthetic dermatology. Widely used in Serums and Facial Creams, it became known for its powerful antioxidant action. In addition to helping to make the skin brighter, it also acts to combat the signs of aging and contributes to the prevention of damage caused by sun exposure.
Derived from ascorbic acid, vitamin C is an essential substance for the body. Its history dates back to the eighteenth century, when it was associated with the prevention of scurry in sailors. “However, it was only in recent decades that the asset has been studied and applied with a focus on skin care, gaining space in the daily beauty routine of millions of people,” says dermatologist Paula Rahal, a member of the Brazilian Society of Dermatology.
In this way, the use of the asset on the skin is more recent. “THE Vitamina C It was used topically from the 1990s, when more robust scientific evidence began to emerge about its antioxidant action on the skin, ”explains dermatologist Otávio Macedo, from the Otávio Macedo & Associados Clinic, who adds:“ Since then, formulations have evolved, increasing their stability and effectiveness. ”
Next, doctors clarify information about the action and use of vitamin C on the skin. Check it out!
1. Vitamin C helps lighten the skin
The asset helps to standardize skin tone, but its effects are not immediate. “Spotlighting depends on the constancy of use and association with other actives, such as ferulic acid, niacinamide and sunscreen,” says Paula Rahal.
2. Not all vitamin C is equal
There are different forms of vitamin C in the cosmetics, such as pure ascorbic acid and derivatives (ascorbil magnesium phosphate, ascorbil glucoside, for example). Ascorbic acid is the most powerful but also the most unstable. More modern formulas combine different versions for greater effectiveness and durability.
3. It is recommended to use during the day
It is recommended to use the asset during the day because it enhances the action of sunscreen against the free radicals. But vitamin C can also be used at night, especially in more sensitive skin or when associated with other treatments.
When well formulated, vitamin C protects the skin from solar damage. What can cause irritation or stains is the use of oxidized, metallic smell or brownish color. It may be a sign that the cosmetic has lost a little effectiveness.
5. The concentration does not always better guarantee the result
Concentrations between 10% and 20% are the most studied and well tolerated. Above that, the risk of irritations increases and there is not always greatest clinical benefit. “More important than isolated concentration is the complete formulation, which includes complementary stabilizers and antioxidants,” says Otávio Macedo.
By Clara Barcelos