Live · Ranked by $/mg ascending
Cheapest research peptides
The cheapest research peptide tracked is Glutathione at $0.03/mg from Novaglo Research. Every peptide we track, ranked by the lowest tracked price per milligram across all vendors. Vial sizes are normalized so a 5 mg vial and a 10 mg vial can be compared on equal terms.
Prices refreshed 2026-06-06
Pep-Index may earn a commission on outbound “Buy” links — this never affects ranking, which is purely lowest $/mg first. For research use only; not for human consumption.
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Peptide
Cheapest vendor
Lowest $/mg
Looking for a specific compound? Browse the full A–Z peptide directory or browse by research category.
$/mg is computed from each vendor's listed vial price and total peptide mass. Vials sold as ranges, bundles, or non-mg formats are excluded from the price-per-mg ranking. For research use only.
Frequently asked
- What is the cheapest research peptide by price per mg?
- Glutathione is the lowest-priced research peptide tracked, at $0.03/mg from Novaglo Research (as of 2026-06-06).
- How many peptides and vendors does Pep-Index track?
- Pep-Index ranks 97 research peptides by price per milligram across 56 vendors. For research use only.