Gly-Pro is a dipeptide composed of glycine and proline, and it plays a significant role in biological and pharmaceutical applications. It is commonly used in research related to collagen metabolism, as it mimics the natural breakdown products of collagen. This makes it useful in studies focusing on tissue repair, wound healing, and skin health. In dermatology and cosmetic science, Gly-Pro is investigated for its potential to support skin elasticity and hydration, often included in formulations aimed at anti-aging and skin regeneration. It may also serve as a biomarker for collagen turnover in clinical settings, helping assess conditions involving connective tissue degradation, such as arthritis or osteoporosis. Additionally, Gly-Pro is used as a reference standard in analytical chemistry, particularly in mass spectrometry and HPLC methods, to identify and quantify peptides in biological samples. Its stability and distinct fragmentation pattern make it ideal for calibration and method development.