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Learn more about the causes of vitamin B12 deficiency

Elliott, BVMS, MRCVS is a veterinarian with over 30 years of experience in veterinary surgery and companion animal practice

If you notice changes in your skin after taking vitamin B12, it is important not to panic, as these effects are often manageable and temporary

Unlike the relatively stable hormonal environment in men, women experience cyclical variations in 17-estradiol (E2) and progesterone (P4) that directly influence key metabolic processes, including glucose homeostasis, lipid oxidation, amino acid turnover, and mitochondrial bioenergetics [3,4,5]