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Summary Vitamin B12 deficiency isnt likely to be a cause for hair loss
"Proof of a causative effect of B12 supplements on acne development will require randomized control trials with enough subjects to see a significant effect, if one exists," he told Live Science
Most people notice improved energy within a few days to a few weeks, depending on how low their levels are and how their body responds to treatment
Without suitable levels of B12, symptoms of a deficiency, such as weakness, weight loss, and confusion, may occur in people with UC
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