Get the Skin of a Stella McCartney Model Without Spending Hours at the Sink

Hyaluronic acid is the skin care ingredient you keep hearing about for a reason. Dermatologists have long known about its hydrating powers, and there's new evidence that it might stimulate collagen production, which is key to plumping the skin and filling out fine lines. Sunday Riley's Tidal contains two types of the ingredient, along with illuminating pearl powder and papaya enzymes for gentle exfoliation.