The Inkey List 15% Vitamin C and EGF Brightening Serum Alongside vitamin C, The Inkey List 15% Vitamin C and EGF Brightening Serum ($15) features one-percent, plant-derived epidermal growth factor (EGF) to support skin's natural collagen and elastin. Image Source: sephora.com The Inkey List 15% Vitamin C and EGF Brightening Serum $15 from sephora.com Buy Now