Peptides are short chains of amino acids that play key roles in how the body functions and communicates at a cellular level. Because they are smaller than proteins, they are often easier for the body to absorb and can act as targeted messengers that support processes such as skin health, muscle repair, immune function, and hormone regulation. Research and medical sources note that certain peptides may help improve skin appearance, aid recovery and tissue repair, and support overall metabolic and immune balance, which is why they are commonly used in healthcare, supplements, and skincare products