1% Retinol For wrinkle reduction. Hyaluronic Acid For deep moisture. Oat Milk For anti-redness. The Theory is our flagship formula — an all day moisturizer formulated with retinol, hyaluronic acid and vegan oat milk. Engineered to the perfect weight, The Theory is the perfect moisturizer for all seasons, keeping your skin deeply nourished, while helping to control the appearance of fine lines and wrinkles. Our oat milk formula is a London fog latte for the soul, and will quickly become the matriarch staple in your skin care regimen. A luxurious glass pump bottle keeps our rich formula cold and at the ready.