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That matters when your target dose is 2.5 mg, because a 0.6 mg error represents a 24% deviation from your intended dose

While these might seem like minor technical changes, they have significant implications for supplement testing

Expert Opin Pharmacother 2011;12:143951.ArticlePubMed 98

If you find abdominal injections uncomfortable or if you are developing tissue irritation at abdominal sites, the thigh provides a reliable alternative with slightly different absorption characteristics

ROS are reported to cause oxidation of the catalytic cysteine residue at the active site of E1 and E2 enzymes and promote the formation of E1/E2-containing disulfide complexes, which prevents these enzymes from catalyzing ubiquitination [note: this would decrease levels of ubiquitin conjugates] (Hunter, 2007)