Applying serum is the third step in your daily skin care regimen after cleansing and toning. Our highly concentrated serums incorporate advanced age-defying peptides and grape stem cell extract into our exclusive Alphasomes® liposomal skin care delivery system for superior product performance. #1 selling G.S. Ginkgosome® and C.S. Citrusome® are now accompanied by three Alphasomes® C-8 booster serums, which provide additional botanical benefits for specific skin concerns.