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Studies in which NAC has been used for only a few week showed little benefit, whereas other studies suggest NAC needs to be taken for at least a three-month period to experience beneficial effects.The vast majority of studies have used oral NAC supplementation (taken by mouth) for at least several weeks to several months
Solutions include using a sharper needle (switching from reused to fresh needle for each injection), ensuring the full recommended rotation pattern, and slowing your injection speed
International Journal of Molecular Sciences, 19(7), 1987
As a consequence, they often become nutritionally deficient
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