Is it dangerous to use Vitamin C in the sun?
Are Vitamin C and sun compatible?
Vitamin C is an essential molecule in skincare. Found in many serums and creams, it offers multiple benefits: antioxidant action, collagen production stimulation, complexion brightening, and reduction of hyperpigmentation spots. But one question often arises:
Is it risky to use vitamin C products before sun exposure?
No! Contrary to popular belief, it is not risky to use vitamin C in the sun; quite the opposite.
The role of vitamin C
Vitamin C is a powerful antioxidant that helps protect the skin against damage caused by free radicals generated by UV rays, pollution, and other environmental factors. It also helps reduce the appearance of wrinkles and dark spots, making the skin brighter and more even.
Unlike some photosensitizing substances like alpha-hydroxy acids (AHAs) or citrus essential oils, vitamin C does not increase the skin's sensitivity to the sun. Therefore, using vitamin C in the sun is not dangerous and is unlikely to cause spots. However, sun protection remains essential to prevent the harmful effects of UV and maximize the benefits of your skincare routine.
In which cases is it mandatory to use SPF if you use vitamin C?
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Tendency to develop spots: If you have hyperpigmentation spots, vitamin C is an excellent choice. However, since the sun accentuates spots, it is essential to use an SPF to prevent the spot from darkening and to allow vitamin C to exert its action.
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Interactions with other products: Vitamin C is sometimes combined with other active ingredients in skincare, such as AHAs or retinol, which can make the skin more sensitive to UV rays. If you use a product containing vitamin C combined with these active ingredients, sun protection becomes indispensable.
Is vitamin C sensitive to the sun?
Yes! Vitamin C is not a photosensitizing product for the skin, BUT vitamin C is photosensitive. This means that if you expose your bottle of vitamin C to the sun, it will tend to oxidize (more or less quickly depending on its form).
This is the process of oxidation of vitamin C: Vitamin C, especially in its pure form (L-ascorbic acid), is very unstable and can oxidize when exposed to air, light, or heat. Once oxidized, it loses its beneficial properties. It is therefore important to use well-formulated products.
How to properly use Vitamin C in skincare?
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Apply vitamin C in the morning: Vitamin C can be used as an antioxidant shield to protect the skin from daily aggressions. Then, be sure to apply sunscreen with a sun protection factor (SPF) of at least 30.
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Choose stable formulations: Opt for products containing more stable derivatives of vitamin C, such as magnesium ascorbyl phosphate or ascorbyl palmitate. These forms are less prone to oxidation.
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Store your products away from light and heat: Keep your vitamin C-based skincare in a cool, dark place to preserve their effectiveness.
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Adapt your routine: If you plan prolonged sun exposure, consider applying vitamin C the evening before to enjoy its benefits without risking rapid oxidation under the effect of UV rays.
The C-Filler serum: Vitamin C by French Filler
The C-filler serum has been designed by healthcare professionals from aesthetic medicine to address complexion radiance and early signs of skin aging such as wrinkles and hyperpigmentation spots.
Its formula contains the patented active ingredient STAY-C® 50, a vitamin complex derived from vitamin C. This complex has the advantage of superior stability in formulations compared to pure vitamin C.
A powerful antioxidant, it protects the skin from photoaging and helps combat fine lines by stimulating collagen I and III synthesis. It restores radiance to dull complexions and has a targeted brightening action on hyperpigmentation spots, as well as an action targeting adult acne.
To learn all about C-Filler, click here: THE C-FILLER SERUM