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Hair, skin, and nails: B12 supports cell reproduction, so hair, skin, and nail health can suffer when levels are low
Because B12 levels arent checked during routine blood work, a deficiency can go undetected for years, Dr
B12 Injections: How Often
Most are animal sources (milk, egg yolks, yogurt, salmon, tuna, beef) which is why vegetarians and vegans have a higher risk of being deficient (3)
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