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Vegetarians or vegans If your diet doesnt consist of the proper amounts of meat, fish and eggs Over age 50 Pregnant or breastfeeding Cigarette smokers If you take medications for heartburn or take potassium supplements If youve had part of your stomach surgically removed or banded / VITAMIN B12 DEFICIENCY AND CHRONIC FATIGUE SYNDROME Why is a lack of B12 of such concern

One sample contained only letrozole, another contained letrozole with stanozolol, and the third contained letrozole with ostarine (Table 2)

Vitamin B12 deficiency (hereinafter referred to as B12 deficiency) has wide-reaching consequences

Molecular and Cellular Endocrinology, 260-262, 190196

doi: 10.3390/molecules28248038