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Researchers in the 1940s were apparently following a valuable lead by showing that estrogen is not fully inactivated by the liver if there is a vitamin B deficiency
Access the full publication through NEJM.org for detailed methodology, adverse event data, and subgroup analyses

doi: 10.1089/bari.2017.0008

La concentration corpusculaire moyenne en hmoglobine (CCMH) est normale (soit de l'ordre de 34 %), sauf s'il y a une carence martiale associe (auquel cas il y a une baisse de la CCMH, i.e

(More information) The preservation of DNA integrity is dependent on folate and vitamin B 12 availability

10.1080/21655979.2021.1967711 167 ZhangS.LiX.ZhangF.YangP.GaoX.SongQ