We see it everywhere in cosmetics: vitamin C is a key ingredient in anti-aging routines and complexions looking for radiance. Since the body cannot synthesize this powerful antioxidant, it is essential to stock up on it through diet and cosmetic treatments. It is found in particular in citrus fruits, strawberries, kiwis, blueberries, guava, carrots, broccoli and even spinach. In cosmetics, pay attention to concentrations. The ideal dosage would be between 10 and 20%. Potentially irritating, apply it gradually to see if your skin tolerates it.
What are the benefits of vitamin C on the skin?
If vitamin C has become an ingredient of choice in cosmetics, it is because it contains many benefits for the skin. “It is an essential active ingredient in any anti-aging routine and against dull complexion because it is a very powerful antioxidant which neutralizes the free radicals responsible for the destruction of collagen and elastin. And when combined with sunscreen increases protection against UVA, says Doctor Gresset-Chaussade, dermatologist in Beaune. Vitamin C also stimulates the production of fibroblasts (skin cells), and therefore increases its elasticity and firmness while reducing the appearance of fine lines. But its properties don’t stop there: by promoting cell renewal, it also allows you to obtain smoother and brighter skin. This vitamin promotes a more even complexion since it also limits the rise of melanin on the surface of the skin and helps fight the appearance of spots. Finally, it contributes to better microcirculation and hydration by protecting the skin barrier.
How to use vitamin C on the face?
In the morning, after cleansing your face, apply your vitamin C-based treatment. The dermatologist then recommends applying your daily treatment and then a sunscreen so that the vitamin C does not oxidize.
Being a fragile and unstable ingredient, it must be contained in an opaque or thick bottle, stored away from light and too high temperatures. If the texture turns brown, this is a sign that the vitamin C has oxidized. The risk ? It then becomes counterproductive and can cause the appearance of ephemeral spots like a self-tanner.
Which product is best not to mix with vitamin C?
Vitamin C can be combined with vitamin E, hyaluronic acid, niacinamide or even ferulic or azelaic acid. On the other hand, we do not combine vitamin C and copper peptides and we use retinol and AHAs in moderation in the evening.
Does vitamin C cause pimples?
Not quite ! Vitamin C can actually cause the appearance of pimples if it is found in a treatment that is too greasy or full of silicones. “You must especially pay attention to the composition and the galenic, but it is not the reference treatment for patients who suffer from inflammatory acne! On the other hand, in post-acne, it helps to treat spots”, underlines the dermatologist. To avoid pimples, choose a gel or aqueous texture. And if you have sensitive skin, opt instead for Ascorbyl Tetraisopalmitate, a form derived from vitamin C stable at a pH below 5. Emollient and fat-soluble, it easily penetrates the skin and provides hydration and softness.
Also, when using a new product, it is possible for the skin to go through what is called a purging stage. This adaptation period is characterized by the appearance of blackheads or even pimples. These imperfections prove that the skin is about to adjust to a new product. On the other hand, if these persist, it is better to consult a dermatologist.