eCosmetics is an authorized retailer of Peter Thomas Roth.An intense, 75 percent hyaluronic acid complex that helps keep skin hydrated.This powerful serum enriched with 75 percent hyaluronic acid helps keep skin hydrated, attracting up to 1,000 times its weight in water from moisture in the atmosphere. The soothing complex replenishes dehydrated skin with vital nourishment, imparts a look of youthful radiance, and smooths the appearance of fine lines and rough skin texture.