2 Use serums Thanks to its fluid texture, much lighter than that of cream, and its formula with concentrated active ingredients, serum penetrates deeply. Apply it before a cream to boost its effectiveness. Choose serums that are rich in antioxidants. They help protect the skin against free radicals, which are partly responsible for premature aging of the skin.
Attention! The SPF number only indicates the level of protection against UVB rays. Yet UVA rays are the biggest contributor to aging caused by sunlight. So remember to look for sunscreens that block both types of rays.