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Using biotin has been shown to improve brittle nail syndrome, but its believed that biotin deficiency may not actually be the cause, Romito says

What Is Vitamin B12, and What Are Its Normal Levels

Many clients report steadier energy throughout the day, better workout performance, and less need to rely on stimulants

Supplementing with Vitamin B12 may delay the onset of depression and has improved the effect of antidepressants [5]

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If an individual has low vitamin B12 levels because of a medical issue, a specialist might suggest oral supplementation or infusions of the nutrient