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Loading phase: If you are low, treatment often starts with a series of injections (for example, once a week for several weeks) to replenish your body's stores
Others take multivitamins for months without noticeable change and wonder if their bodies absorb what they need
However, scientific research shows that very high-dose oral B12 (1,000-2,000 mcg) can be effective for some, as about 1% can be absorbed without intrinsic factor
Evidence type: Human RCT | Observational | Animal | In vitro | Regulatory Mechanism of Action 5-Amino-1MQ works by blocking the NNMT enzyme , which is responsible for consuming nicotinamide and depleting NAD+ stores
It is vital for making DNA and red blood cells
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