brittanie's thyme hyaluronic acid serum, 8 oz, 100% botanical professional clinical strength for face | anti-aging anti wrinkles & hydrating skincare treatment brittanie's thyme hyaluronic acid is a powerful anti-aging ingredient in skin care. it is an irreplaceable hydrating ingredient because of its ability to attract and retain moisture. it protects the skin, it helps to restore youthfulness by plumping skin and giving it a smoother appearance. botanical hyaluronic acid is derived from a plant called cassia angustifolia (senna alexandria).