Hub
RUO peptides: what research use only means and how to buy them
"RUO peptides" and "research use only peptides" describe laboratory materials sold for research, not for people or animals. This hub explains what the RUO label means, how to read a product label, CAS number, and certificate of analysis, and links to every research vial and guide on peptide.prof.
Every product on peptide.prof is sold as research use only material, Made in USA, and shipped to a United States address after payment.
What "research use only" means
RUO is a labeling category. A research use only peptide is sold as laboratory material for in vitro or other research work. It is not a drug, a supplement, or a compounded medication, and it is not intended for human or veterinary use, diagnosis, or treatment.
In practice, an honest RUO listing:
- States "research use only" and "not for human or veterinary use" on the product page itself, not only in a footer.
- Contains no dose, administration route, or "protocol" copy.
- Makes no treatment, health, or body-composition claims.
- Describes the material in chemical terms: name, strength in milligrams, form, and identity data.
peptide.prof's full policy is on the research use page.
RUO peptides vs compounded peptides
Compounded peptides are prepared by licensed pharmacies under section 503A or 503B of the Federal Food, Drug, and Cosmetic Act. The 2026 HHS interim enforcement-discretion policy covers 503A compounding of certain peptide bulk substances (BPC-157, Epitalon, KPV, MOTS-c, Semax, and TB-500). Research use only peptides sit outside that pharmacy framework. peptide.prof does not compound under 503A or 503B.
For the dated policy notes and primary FDA/HHS sources, see the FDA and HHS peptide compounding tracker and the compounded vs research peptides explainer.
How to read an RUO peptide label
A research vial label and its product page should answer the same questions. Check each one before you order:
| Label field | What to look for |
|---|---|
| Compound name | The standard name (for example "Selank," not a vague "focus blend"). |
| Strength | A stated amount in milligrams per vial (for example 10 mg). |
| Form | Lyophilized (freeze-dried) powder for peptide vials; liquid for water; pre-mixed for disposable pens. |
| Intended use | "Research use only. Not for human or veterinary use." |
| Origin | Where the material is made. peptide.prof lists Made in USA. |
| Lot information | A lot or batch reference you can match to a certificate, when one is posted. |
How to use a CAS number
A CAS Registry Number is a unique identifier for a chemical substance. It lets you match a seller's listing to a public record such as PubChem. Compare the CAS number, molecular formula, molecular weight, and (for peptides) the amino acid sequence on the product page with the public record. A mismatch is a reason to ask questions before you buy.
Examples from peptide.prof guides, each checked against PubChem:
- Selank: CAS 129954-34-3, C33H57N11O9 (Selank buyer checklist).
- Semax: CAS 80714-61-0 (Selank vs Semax).
- Glutathione: CAS 70-18-8, C10H17N3O6S (glutathione 600 mg buyer checklist).
- SS-31 (elamipretide): CAS 736992-21-5, C32H49N9O5 (SS-31 buyer checklist).
How to read a certificate of analysis (COA)
A certificate of analysis is a lot-level document from testing. When one is available, read it for:
- Identity: the compound name and, ideally, a mass result that matches the expected molecular weight.
- Purity: the reported percentage and the method used (often HPLC).
- Lot or batch number: it should match the vial or order you receive.
- Date and lab: who ran the test and when.
The peptide.prof homepage trust list says "Batch COA when listed." That is an on-page policy, not a promise that every product shows a PDF at all times. If no certificate is posted for a product, do not assume a purity figure the store has not published.
Research use only peptides on peptide.prof
Every product page below states research use only, the strength, and the form. Price and stock update on each product page, so the live buy box is the source of truth.
| Product | Format listed |
|---|---|
| BPC-157 | 5 mg · 10 mg lyophilized vials |
| TB-500 | 5 mg · 10 mg lyophilized vials |
| Epitalon | 10 mg vial (stock and price pending) |
| KPV | 10 mg lyophilized vial |
| MOTS-c | 10 mg · 40 mg lyophilized vials |
| Selank | 10 mg lyophilized vial |
| Semax | 10 mg lyophilized vial |
| SS-31 | 10 mg lyophilized vial |
| Retatrutide | 5 mg · 10 mg · 20 mg · 30 mg vials |
| Glutathione | 600 mg lyophilized vial |
| Glutathione Pen | 600 mg single-chamber disposable research pen |
| NAD+ Pen | 500 mg disposable research pen |
| KLOW Pen | 80 mg disposable research pen |
| Bacteriostatic water | 3 mL · 10 mL vials (lab supply) |
Bacteriostatic water is a separate lab supply line and is not bundled with peptide vials. For the difference from sterile water, see bacteriostatic vs sterile water. Metabolic research listings are also grouped on the metabolic category page.
RUO buyer guides and comparisons
- Selank vs Semax: identity, vial formats, and 2026 HHS context.
- BPC-157 vs TB-500: strengths, stock honesty, and shared HHS notes.
- Bacteriostatic water vs sterile water: the preservative difference.
- Selank peptide buyer checklist: CAS, powder specs, and RUO labeling.
- Glutathione 600 mg buyer checklist: CAS 70-18-8, vial vs pen, and RUO labeling.
- SS-31 (elamipretide) buyer checklist: CAS 736992-21-5, sequence, and 10 mg vial specs.
- Where researchers buy MOTS-c online: a vendor checklist.
- Where to buy KPV research vials: a vendor checklist.
- FDA and HHS peptide compounding in 2026: a living regulatory tracker.
- Compounded (503A) vs research-use peptides: the plain-English difference.
- BPC-157 compounding status in 2026.
- Dated HHS and LegitScript notes for Semax, TB-500, and Epitalon.
RUO peptide buyer checklist
- Does the product page say research use only and not for human or veterinary use?
- Is the strength stated in milligrams and the form named?
- Does the CAS number, formula, or sequence match the public record?
- Are pack prices written as numbers you can see before checkout?
- Is a lot certificate posted, and does its lot number match your order?
- Are payment methods and the ship-to country stated up front?
On peptide.prof, payment goes to the store by Venmo or crypto, and orders ship to a United States address after payment is confirmed.
Ready to order research use only peptides? Open a product page, pick a pack size, and check out when you are ready. Research use only.
FAQ
- What does RUO mean on a peptide?
- RUO stands for research use only. It means the material is sold for laboratory research and is not intended for human or veterinary use, diagnosis, or treatment. An RUO listing should not carry dose, administration, or health-claim copy.
- Are research use only peptides the same as compounded peptides?
- No. Compounded peptides are prepared by pharmacies under section 503A or 503B rules. Research use only peptides are laboratory materials sold outside that framework. peptide.prof does not compound and sells research material only.
- How do I check a research peptide's identity before buying?
- Match the name, CAS number, sequence, and molecular formula on the product page to a public chemical record such as PubChem, confirm the stated strength in milligrams and the form (for example lyophilized powder), and check whether a lot certificate of analysis is actually posted.
- Which RUO peptides does peptide.prof list?
- The catalog lists BPC-157, TB-500, Epitalon, KPV, MOTS-c, Selank, Semax, SS-31, Retatrutide, and glutathione as research vials, plus Glutathione, NAD+, and KLOW disposable research pens and bacteriostatic water. Live price and stock are on each product page.
- Does peptide.prof provide dosing for research peptides?
- No. peptide.prof sells laboratory research material only. Not for human or veterinary use. The site does not publish dose, administration, or reconstitution instructions.
Research use only. Not for human or veterinary use. No dose or administration instructions on this site. Identity data checked against PubChem on the dates shown in each linked guide. Prices and stock: live product pages.