This is why **N-acetyl-L-cysteineNACis so important.** NAC provides the body with a usable precursor to cysteine, giving liver cells and other cells the raw material they need to manufacture their own glutathione where it is actually required
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10.1186/s12951-020-00681-8 129 MaX.PanY.ZhaoW.SunP.ZhaoJ.YanS.et al (2022)
any residual solution remaining after this interval, or if contamination is suspected, must be discarded in accordance with local pharmaceutical-waste regulations
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