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intramuscular administration of vitamin B12 for the treatment of its deficiency
None of that makes them useless
Injectable B12 is often preferred because it bypasses the digestive system and delivers the vitamin directly into the body
Categories: Metabolic, Performance
The catch and this is where honesty matters on a YMYL page is that can survive the gut in principle is not the same as has a proven, quantified oral bioavailability in humans. No such human number exists for this molecule
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