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Hair, skin, and nails: B12 supports cell reproduction, so hair, skin, and nail health can suffer when levels are low
This is unlike fat soluble vitamins, like vitamins A, D E, and K, which will continue to get stored in the bodys fat when supplemented excessively, and can lead to side effects if over supplemented beyond the bodys needs
Usually, we see improvements in a few weeks
A clinical trial from Spain treated adults, with an average age of 74, for eight weeks with 1,000 g of cyanocobalamin per day and then for another 46 weeks with 1,000 g per week
This depends on your goals and current health
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