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For ghk-cu topical, the first practical step is to separate human evidence from preclinical or anecdotal claims
It also plays a role in protecting B12 from being destroyed by stomach acid, such as in the stomach and intestines.[ref] TCN2 (transcobalamin II, TCN2 gene): TCN2 is a B12 transport protein that moves vitamin B12 from the bloodstream into cells throughout the body
Others find a single well-executed protocol provides lasting benefit
How Long Does a B12 Shot Last
Many conditions cause similar symptoms, and inappropriate supplementation may mask underlying diagnoses whilst providing no benefit
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