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Studies in men undergoing fertility evaluation have shown an association between B12 deficiency and changes in male hormone levels
Most practitioners recommend starting with 250 mcg daily, administered subcutaneously, usually in the morning
Directions for Use: Administer by intramuscular, subcutaneous or intravenous injection, 2 to 4 g per kg of body weight
Some versions include extra add-ons, so you should verify the exact formulation youre offered
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