This non-sticky, hyaluronic acid-alternative serum helps dry, dehydrated skin bounce back. Tremella mushroom is a vegan collagen that leaves skin feeling hydrated and plump. This non-sticky, hyaluronic acid-alternative serum helps dry, dehydrated skin bounce back. Tremella mushroom is a vegan collagen that leaves skin feeling hydrated and plump. Founded by a husband and wife duo in their Seattle kitchen, Herbivore aims to make daily beauty rituals enjoyable and rejuvenating. Using raw ingredients like French pink clay, Brazilian gemstones, and Moroccan rose, each soak, mist, and mask in this therapeutic collection is thoughtfully blended from scratch.