COL15A1 and sarcopenia: The transcription levels of MFGE8 (per 1 SD increase) and COL15A1 (per 1 SD decrease) in skeletal muscle tissue eQTL dataset were associated with higher ALM (MFGE8, beta: 0.09, 95% CI: 0.06–0.11; COL15A1, beta: −0.07, 95% CI: −0.10 to −0.04) and were replicated in the blood pQTL dataset (MFGE8, beta: 0.05, 95% CI: 0.03–0.07; COL15A1, beta: −0.05, 95% CI: −0.06 to −0.03), indicating the reduced risk of sarcopenia.