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The average diet supplies about 5 to 15 mcg/day of vitamin B12 in a protein-bound form that is available for absorption after normal digestion
Think of it as fuel for the engine rather than the accelerator
Patients frequently report an energy change in the first day or two, which is most plausibly B12 in deficient patients, and expectation in everyone else
Check out my videos The Optimal Vitamin B12 Dosage for Adults and The Optimal Vitamin B12 Dosage for Kids, Pregnancy, and Seniors which go into detail
A simple blood test will reveal how much you need to function optimally
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