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The effect of oral administration of collagen peptides (CPs) on platelet release indicators, (A) platelet factor 4 (PF4), (B) granule membrane protein 140 (GMP‐140), (C) serotonin (5‐HT). M, model group (old controls), CPs, administrated with collagen peptides; Y, young controls. Values are means ± S.D. (n = 3 mice/group), * P < 0.05, ** P < 0.01, as compared with the model group.
