The world's best celebrity skin gurus have been chatting to Marie Claire about which products and techniques will transform your complexion.

"After age 30, you’re losing 1% of your collagen a year so it’s important to invest in a serum that helps skin to replenish its lost reserves. I swear by Neostrata Skin Active Firming Collagen Booster Serum."

Find the Neostrata Skin Active Firming Collagen Booster Serum here.

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