A.800-1000mg/d B.1000-1500mg/d C.1500-1800mg/d D.1800-2000mg/d
A.18.5-22.9 B.23-24.9 C.24.0-27.9 D.≥28
A.维生素B6吸收 B.维生素B12吸收 C.维生素PP吸收 D.维生素K吸收