However, some skin-care products do contain milk proteins. “Beekman 1802 has an entire line that uses goat milk,” offers Shereene Idriss, MD, a board-certified dermatologist and founder of #PillowtalkDerm. “Some products have milk proteins or even compounds found in milk, but [are] derived from vegan alternatives,” such as centella milk, rice milk, linseed milk, and almond milk extract, which is found in Kiehl’s Milk-Peel Gentle Exfoliating Toner. “Most [brands] use plant-based milks and components that are found in milk: lactic acid, antioxidants, calcium, and vitamin B,” says dermatologist Rachel Nazarian, MD. “The ‘milk’-based marketing often [shows] the milky, creamy appearance of the product, and highlights the hydrating, soothing potential.”