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As a D-amino acid peptide, FOXO4-DRI is costly to synthesize, and a wrong amino acid at the binding site can sharply cut activity

Taken together, these results suggest that nuclear localization of FOXO4 may contribute to Leydig cell senescence and the downregulation of testosterone synthesis

Skin Firmness, Hydration, and a Refreshed Complexion Collagen plays a major role in the skin's ability to retain moisture and maintain skin firmness

Peptides with particularly vulnerable amino acid sequences, especially those containing arginine or lysine residues at cleavage-susceptible positions, may be broken down before absorption occurs

Cellular senescence as a mechanism and target in chronic lung diseases