when do you see glutathione results Injections: Cost, Benefits and Side Effects Glutathione Tablets for Glowing Skin
Description
A meta-analysis of studies using NAC to increase athletic performance found that there were more side effects (none severe) at 20g/day.[ref] High doses of NAC are used in hospitals by IV for reversing acetaminophen toxicity

Krzastek SC, Farhi J, Gray M, Smith RP

The difference is not arbitrary

Because the substance doesn't need to be processed through your digestive system, receiving glutathione via injections is more effective than receiving it orally (via ingestion)

A longer BUD from a reputable pharmacy generally indicates more rigorous testing, not a less safe product
