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G., Rodionov, D
Long-Term Protocols: The most clinically relevant studies evaluated subcutaneous doses of 0.25 mg (250 mcg), 0.5 mg (500 mcg), and 1 mg (1,000 mcg) administered daily for 24 weeks
Even high doses of biotin have not demonstrated toxic effects, so there is no strict upper limit for safety established in humans
Berlin H, Berlin R, Brante G (1968) Oral treatment of pernicious anemia with high doses of vitamin B12 without intrinsic factor
For anyone dealing with absorption issues or needing rapid replenishment, IV infusions offer a comprehensive approach that single-nutrient methods cannot match
An intramuscular injection is absorbed faster because the muscle tissue has more blood supply
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