Many users wonder if B12 injections need refrigeration, and the answer depends on the formulation
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With a water soluble vitamin, such as B12, this is basically going to render the supplement useless, as it is going to dissipate the potency of the dosage which you are taking
Q: Can I get too much B12 from injections
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A simple rotation system: lower abdomen left lower abdomen right left thigh right thigh, cycling daily