vitamin b12 oral vs injection Frontiers B12 Injections vs Oral Supplements:

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NNMT is an enzyme that regulates energy metabolism by methylating nicotinamide, a precursor to NAD+, into 1-methylnicotinamide

How long the injection lasts depends on several factors: How severe the deficiency is A persons age and how fast their body processes things Problems with digestion or absorbing nutrients Daily habits or activity levels How often does the body use B12 inside its cells People with pernicious anemia or ongoing deficiency often get weekly shots, while others do fine with a monthly injection

Problems with Absorption Even if someone receives high doses of vitamin B12, it doesnt necessarily mean that his or her body has the ability to properly absorb and use the whole dose