Carrier peptides deliver trace minerals to the skin care peptides to boost collagen, while enzyme inhibitor peptides work to slow down the skin’s natural breakdown of collagen. Signal peptides send messages to different parts of the skin to promote collagen, elastin and other proteins; and neurotransmitter peptides, touted as “Botox-like,” block the release of chemicals that cause the semaglutide peptide for sale contraction of expression lines, thus smoothing wrinkles.