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For a 5mg peptide vial : For a 2mg peptide vial : Choose the volume that gives you convenient, measurable injection volumes for your protocol

It is sometimes referred to as GSH and L-glutathione, which are the same substance

After an injection, blood levels can remain elevated for several weeks because your body absorbs what it needs and stores the rest in the liver

The authors have not disclosed any funding

Purity testing The company states each batch undergoes testing to confirm 99% or greater purity

Last reviewed: May 30, 2026 Last updated: May 30, 2026 Written by: Jay Hastings , CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations