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Intramuscular B12 injections produce faster results than oral supplementation, with reticulocytosis typically beginning by day 34 of treatment
Long-term use of medications such as metformin or proton pump inhibitors can also reduce B12 absorption
These treatments can be especially useful for athletes seeking quick recovery or individuals dealing with stress or fatigue
Common side effects include pain or redness at the injection site, mild diarrhea, itching, and swelling
The copper peptides purging guide explains this phenomenon
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