Glutathione peptide compared: a 600mg research-grade vial for $40.80, price per mg against NAD+, MOTS-c and epithalon, and how to read the lot COA.
Glutathione research peptide — a major antioxidant studied for oxidative-stress support. Lab tested, COA published.
Sold and shipped by Real Peptides. Shipping times, returns and regional restrictions are set on the vendor’s page; most US orders arrive in 1–3 business days in discreet packaging.
We only list products where the vendor publishes a batch-specific certificate of analysis from a third-party lab. Check the COA on the vendor’s page before ordering.
Every pick has a batch-matched certificate of analysis we can read.
We check that real potency matches what the label promises.
Simple, transparent formulas — no mystery fillers or additives.
Scored on real cost per serving, not just sticker price.
Ranked by published COA, potency accuracy and price per mg.
Glutathione research peptide — a major antioxidant studied for oxidative-stress support. Lab tested, COA published.
NAD+ research peptide in a multi-dose vial. Independent lab tested with COA published per lot. Ships from US stock.
NAD+ in a 1000 mg liquid spray format. Lab tested per lot with COA published. Ships from US stock.
Epithalon (epitalon) is a tetrapeptide studied for telomerase activation and aging biology.
MOTS-c is a mitochondrial-derived peptide studied for metabolic and exercise-capacity research.
| Product | Form | Strength | Testing | Shipping | Price |
|---|---|---|---|---|---|
| Real Peptides Glutathione Peptide | Lyophilized powder | 600mg | Third-party COA | — | $40.80 |
| Real Peptides NAD+ Peptide (Multi-Dose Vial) | Lyophilized powder | — | Third-party COA | US stock | $60.00 |
| Real Peptides NAD+ Peptide Liquid Spray (100 | Liquid spray | 1000mg | Third-party COA | US stock | $120.00 |
| Real Peptides Epithalon Peptide (10mg) | Lyophilized powder | 10mg | Third-party COA | — | $24.00 |
| Real Peptides MOTS-c Peptide | Lyophilized powder | 10mg | Third-party COA | — | $43.20 |
| Product | Vendor | Our score |
|---|---|---|
| Glutathione Peptide | Real Peptides | 4.2 |
| NAD+ Peptide (Multi-Dose Vial) | Real Peptides | 4.2 |
| NAD+ Peptide Liquid Spray (1000mg) | Real Peptides | 4.2 |
| Epithalon Peptide (10mg) | Real Peptides | 4.2 |
| MOTS-c Peptide | Real Peptides | 4.2 |
Real Peptides on Trustpilot: 4.2/5 from 85 reviews (last 12 months), checked Nov 2026 · read them on Trustpilot
What Real Peptides customers say on Trustpilot (5★ 76% · 4★ 5% · 3★ 0% · 2★ 1% · 1★ 18%)
Summary of the reviews written by our editors; the reviews themselves are on Trustpilot.
Ratings are our editors’ scores from one public rubric (COA, price per mg, delivery, returns, vendor reputation). They are not customer reviews. How we review
The glutathione peptide listed on this site is a 600mg vial of lyophilized powder from Real Peptides, priced at $40.80 with a third-party COA published per lot. Per milligram, that is roughly 6.8 cents, which makes it one of the cheapest research compounds in the vendor's catalog by weight.
Considering that glutathione is one of the tripeptides, it is often thought of as a "peptide" by suppliers as well. On this page, we will present what the research product is, how it differs from its medicinal counterparts, and how to evaluate the batch before purchase. Glutathione is a research substance and not yet approved by the FDA.
There is a single item mentioned in this listing, which is a sealed glass vial filled with 600 mg of freeze-dried glutathione powder. It is the only item to be shipped with this item. The seller has explicitly stated the limitations to such product, claiming that the product is only for research use and that it does not being to the NAD+ category.
That second note exists because many buyers find glutathione while shopping for NAD+. They are different molecules with different roles. If NAD+ is what you are researching, our glutathione vs NAD+ comparison explains the difference.
Glutathione peptide is much less expensive as compared to the other longevity supplements on this website. Nevertheless, such comparison may be misleading. It is worth mentioning that varying molecules are being investigated at distantly different scales; therefore, the price of a medicine per milligram shows how valuable it is as one compound, but not among the rest of the products.
| Product | Size | Price | Price per mg |
|---|---|---|---|
| Glutathione Peptide | 600mg | $40.80 | $0.068 |
| NAD+ Peptide Liquid Spray | 1000mg | $120.00 | $0.12 |
| MOTS-c Peptide | 10mg | $43.20 | $4.32 |
| Epithalon Peptide | 10mg | $24.00 | $2.40 |
I obtained this information from the prices shown in the table and the sizes. The multi-dose vial of NAD+ ($60.00) is not included in the per-mg column as there is no information about its size.
In accordance with the law, the research-grade product by GSH and the GSH used in clinics are not the same products even if they are the same thing on a molecular level. The clinic receives the product from the pharmacy and is used by a licensed professional, while the research supplier sells a chemical product which is marked as "not for human consumption", i.e. it is sold without any medical supervision and without carrying out any consultation.
That difference is the reason this site gives no human-use information for the research vial. In August 2026 FDA made clear that "research use only" wording on a label is not enough if the rest of a website points toward human use. Buyers comparing the two should read our glutathione IV vs injection vs research vial page, which lays out what each route involves.
Another major difference is pricing. The price of one vial is $40.80. A clinic appointment is a type of a service involving a number of things never included in the vial price, such as testing and medical liability.
a good COA for a glutathione peptide, elements such as the lot number, the laboratory that performed the tests, the identity result, and the purity result must be included. If one of these items is omitted, the COA is more like an advertisement than a verification document.
Some buyers commit the same mistake as seen the fact that they read COA on the product page and think that it is applicable to the vial they receive. This COA only applies to the declared batch. Check the number on the vial and compare it with that on the certificate. If they do not match, ask the supplier for the corresponding COA prior to using the product in any experiment.
Look also at the stated quantity. The label says 600mg; the COA should support that figure, not a different one.
Whoever may find interest in this glutathione peptide is not a party looking for personal wellness or skin product. The product is sold primarily for laboratory research and has not been approved by the FDA, thus lacking the medical screening that is needed by anyone going for the injection.
Anyone interested in glutathione for their own health should talk to their doctor. Those curious about the claims themselves can read glutathione injection benefits: claims vs evidence, where we separate what lab research shows from what clinic menus promise. Lab buyers ready to order will find vendor details on the buy glutathione peptide page.
Discounts shown are real: the vendor’s own sale price, or how much cheaper per mg a product is than the average of the vendors on this page.