eCosmetics is an authorized retailer of Peter Thomas Roth. 7 forms of Collagen and collagen-supporting ingredients help skin appear firmer and smoother. Marine Collagen, Plant Collagen and Hydrolyzed Collagen help improve the look of fine lines, wrinkles, firmness and elasticity while Hydroxyproline, Peptides, Collagen Amino Acids and Fatty Acids help boost results.