Niacin is a necessary cofactor in the anabolic methionine cycle, supporting enzymes like dihydrofolate reductase
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Thyroid issues: Excess estrogen can block thyroid hormones from reaching their receptor sites in order to do their job
Light exposure is a secondary but real concern: ultraviolet light can break down aromatic amino acid residues over time, which is why storing vials in their original container, away from direct light, is standard practice rather than an optional precaution
Vitamin B12 may be needed if youre pregnant or lactating, especially if youre also eating a plant-based diet, says Sue-Ellen Anderson-Haynes, MS, RDN, CDCES, owner of 360Girls&Women and spokesperson of the Academy of Nutrition and Dietetics
Free radicals are created when we breathe, eat, and drink