The Geek & Gorgeous A-Game 5 serum is a silky, lightweight serum with 0.05% retinal (vitamin A) that firms your skin and reduces wrinkles and dark spots. It stimulates collagen production, resulting in firmer and more elastic skin. This retinal serum is ideal for those new to retinoids. If you prefer a higher concentration of retinal, the Geek & Gorgeous A-Game 10 is the perfect choice.