Thats because vitamin D isnt readily found in a lot of foods, and many people dont get enough sunlight for their bodies to make sufficient amounts of vitamin D
Su L, Yang ZT, Qu H, Luo CL, Yuan GX, Wu J, et al
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5b), as well as by their increased phosphorylation of the translation initiation factor eIF4E (Supplementary Fig
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However, according to results of a web-based survey between August 2019 and April 2020 within 2,385 AAS users (Bonnecaze et al., 2020), the main PED used during AAS cycle were anastrozole (48%), tamoxifen (31%), exemestane (30%), and hCG (29%), whereas tamoxifen (40%), clomiphene (32%), hCG (26%), anastrozole (16%), exemestane (9%), letrozole (3%), and cabergoline/bromocriptine (1.6%) were used as PCT