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The nasal spray is typically reserved for maintaining B12 levels after injections bring particularly low levels back to normal (5)
Your body is able to absorb between 15% and 97% of the B12 vitamin from the injection without snags or additional hindrances
A provider screens your history, watches for any reaction, and adjusts or stops if needed
For people who dont absorb B12 well, or those whose want to make sure beyond reasonable doubt that theyre getting an ample dose quickly, B12 shots are available via prescription, says Richard Foxx, M.D., a board-certified physician who treats hormonal disorders and nutritional deficiencies
B12 injections bypass the digestive system, making them particularly valuable for individuals who cannot absorb the vitamin adequately through oral supplementation
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