A 10 mg vial that actually contains 7 mg of active peptide (with the rest being filler or degraded material) will produce inconsistent results regardless of how perfectly you execute your reconstitution and dosing protocol
These, for example, include prodrug strategies, as seen in the case of OTC, which was designed to have improved bioavailability and stability (it is thought of being converted to cysteine intracellularly, which is then used for GSH synthesis) or NAC amide that has improved lipophilicity and cell permeability
Teratogen Carcinogen Mutagen 2002;22: 227234
Although antioxidant supplementation is generally safe, it does not mean that the more you consume, the better
[10] [12] It may reduce the efficacy of certain anticoagulants, such as warfarin, by affecting hepatic metabolism or interfering with laboratory monitoring of coagulation parameters