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Some of the human trials involved injecting the peptide under the skin (subcutaneously) and into the muscles (intramuscularly)
Running them together gives researchers two complementary repair signals: more local blood supply, plus more repair cells that can travel to where they are needed
But when you go that unproven route, theres a bigger risk of missing the underlying cause and suffering side effects
Frequently Asked Questions How long does it take to feel the effects of B12 injections
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