Proline, an amino acid crucial for protein production, is widely utilized in anti-aging skincare due to its ability to enhance skin elasticity, stimulate collagen synthesis, and facilitate skin repair and renewal. As a non-essential amino acid, proline can be synthesized by the body from L-glutamate. Its role extends beyond skincare, as it serves as an osmoprotectant in pharmaceuticals and biotechnological applications, shielding drugs from oxidative stress-induced degradation.