Neostrata firming collagen booster neostrata firming collagen booster is an amazing anti ageing serum containing neostratas advanced synerg 6.5 formula which incorporates three clinically proven technologies that work together targeting new and existing collagen. The firming collagen booster preserves the existing collagen structure by inhibiting mmp enzymes that breakdown collagen and helps stimulate new collagen synthesis. Benefits healthy, stronger collagen makes skin feel firmer and appear more lifted. Lines and wrinkles are smoothed from the inside out. Use this light serum to complement your daily anti ageing regimen and boost your skins natural rejuvenation cycle. Using your fingertips, gently apply the serum to a cleansed face. Smooth all over the face and neck or apply to specific areas. Can be used alone or under treatment and moisturiser.