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Longer-Lasting Effects Depending on the dosage, the effects of Vitamin B12 injections can last anywhere from one week to a month, meaning fewer doses are needed to maintain adequate levels
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Grip strength increased by approximately 60% when the compound was combined with rigorous exercise training, compared to about 25% improvement from either exercise or treatment alone
This can also help you build muscle mass
Headaches or Lightheadedness: A small number of people might report mild headaches or feel a bit lightheaded for a short time, particularly right after an injection
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