Glycine is one of the most abundant amino acids in the body, yet it is conditionally essential, meaning dietary or supplemental intake becomes increasingly important when the body's demands are high, such as during periods of stress or increased physical activity.
Modern diets are often low in glycine-rich foods. Collagen and connective tissue, the primary dietary sources, are largely absent from typical eating patterns, making it difficult to consistently meet the body's needs through diet alone.
