Collagen peptides, also known as hydrolyzed collagen or collagen hydrolysate, are small bioactive peptides derived from the enzymatic hydrolysis of collagen, a structural protein found abundantly in the connective tissues of animals. These peptides are typically sourced from bovine, porcine, or marine origins and are characterized by their high content of glycine, proline, and hydroxyproline. The hydrolysis process breaks down the collagen into smaller, more easily absorbed peptides, enhancing their bioavailability when ingested. Researchers have primarily focused on the potential anti-aging and skin health benefits of collagen peptides. Studies have observed improvements in skin elasticity, hydration, and dermal collagen density following supplementation. Additionally, collagen peptides have been investigated for their role in joint health, bone density, and muscle mass maintenance. The mechanism of action of collagen peptides involves their absorption in the small intestine and subsequent distribution to target tissues. Once absorbed, these peptides may stimulate fibroblast activity, promoting the synthesis of new collagen fibers and extracellular matrix components. This activity is thought to contribute to the observed improvements in skin and joint health. Pharmacokinetic studies suggest that collagen peptides have a relatively short half-life, with rapid absorption and distribution following oral ingestion. However, specific half-life data for different administration routes remain limited. The bioavailability of collagen peptides is generally considered moderate, with absorption efficiency influenced by the peptide size and amino acid composition. Current research on collagen peptides continues to explore their broader health implications, including potential benefits for gut health and metabolic regulation. Regulatory standing varies by region; in many countries, collagen peptides are classified as dietary supplements rather than medicinal products, allowing for their widespread use in nutraceuticals and functional foods.