Carrier exosomes deliver trace minerals to the skin 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 best peptides for muscle growth that cause the muscle contraction of expression lines, thus smoothing wrinkles.