Glutathione vendor rankings, purity, and price

PVS is a 0–100 score from lab results, published COAs, and community reports — How we score it.

Ranked by PVS, which no payment can change. Purity is the median of lab results for this compound. Vendor self-published PDFs don't count.

Median is $0.05/mg. Vendors under half the median ($0.02/mg) with no COA in the last 12 months are flagged.

Source: Vendor storefronts.

Listed storefront price after any permanent public discount code. Listed price is not the price you will pay at checkout. No affiliate codes, no referral fees. See full price methodology

• Impurity risks

  HPLC measures relative purity but can't confirm identity. Truncated or co-eluting synthesis byproducts can inflate the number, so Glutathione purity should come with a chromatogram showing one dominant peak.

  Read more: HPLC vs Mass Spec: Peptide Purity Testing Methods Compared

• Common fake patterns

  The same COA image reused across batches or peptides, "COA on request" only, missing lab details, and prices far below the market median.

  Read more: How to Choose a Peptide Vendor: A Researcher's Checklist

• What a real COA shows

  Mass spec confirming Glutathione's molecular weight within ±1 Da, HPLC purity of 98% or higher, the lab name and test date, and a batch number that matches your vial.

  Read more: How to Read a Peptide Certificate of Analysis

Have a COA for Glutathione? Check it against the lab results on file.

• GHK-Cu
• NAD+
• Epithalon
• MOTS-c
• Humanin
• SS-31 (Elamipretide)

Glutathione is a tripeptide antioxidant (glutamate-cysteine-glycine) central to cellular redox balance.

Also sold as: GSH, L-Glutathione

For research purposes only. PepAssure publishes vendor verification data and does not endorse any use.