Back to the journal
Peptides
6 min read
Updated Oct 29, 2026.
Part of The Sommar Peptide Guide. FDA statuses below are as of FDA's pages dated Apr 22 and May 14, 2026, and sources through Oct 29, 2026.
Same peptide name on two vials. One came with a prescriber and a licensed pharmacy. The other came in a padded mailer with "research use only" on the label. Those are different products with different rules, and FDA treats them differently.
The short answer
Prescription peptide | "Research use only" peptide | |
|---|---|---|
Who makes it | A drug company (approved drug) or a licensed pharmacy (compounded) | Unknown from the label |
Prescription | Required | None asked for |
Clinician reads your history | Yes | No |
FDA review before sale | Approved drugs, yes. Compounded drugs, no [1] | No |
Labeled for | A named patient | "Not for human consumption" |
What FDA has said | Covered by drug and pharmacy law [1][3] | FDA has warned sellers that the label doesn't change what the product is for [6][7] |
Prescription peptides come in two kinds
FDA-approved peptide drugs. Insulin is a peptide. More than 80 peptide drugs are approved worldwide [8]. A drug company makes them, FDA reviews them before they're sold, and a clinician prescribes them [1].
Compounded peptides. A licensed pharmacy makes the drug for one patient, from a valid prescription, under section 503A of federal law [3]. The pharmacy can only use a bulk ingredient that has an official quality standard, is part of an FDA-approved drug, or is on FDA's 503A bulks list [4].
Compounded drugs are not FDA-approved. FDA does not check their safety, effectiveness or quality before they're sold [1][2]. That's why the pharmacy matters. State boards of pharmacy license and oversee these pharmacies [1].
What "research use only" means
It's a label sellers put on peptides sold online, often with "not for human consumption" next to it. The seller is saying the product is not for people.
FDA doesn't take the label at face value. In 2026 warning letters to online peptide sellers, FDA wrote that despite the "research use only" labeling, "evidence obtained from your website establishes that your products are intended to be drugs for human use" [6][7]. FDA cited those products as unapproved new drugs [6][7].
What a research-use vial skips:
A prescriber who reads your health history.
A pharmacy making it for you, under a state license.
Any quality check for human use.
A label with your name, dose and directions.
FDA also flagged that injectable products like these "bypass some of the body's key defenses" [6].
Where the popular peptides sit
Many peptides sold as "research use only" are ones FDA has reviewed for compounding. BPC-157, TB-500, MOTS-c and others came off FDA's Category 2 safety list in Apr 2026 [5]. That did not approve them. None is approved by FDA for any use, and none is on the 503A bulks list [4].
FDA's stated concerns for these peptides include impurities, immune reactions and missing human safety data [5]. Its advisory panel voted yes on 6 of 7 in Jul 2026, against FDA staff's advice. The votes are advice only [12].
On Oct 28, 2026, HHS filed an interim policy saying it won't take enforcement action against state-licensed pharmacies, federal facilities or licensed physicians that compound six peptides under its conditions: BPC-157, TB-500, MOTS-c, epitalon, semax and KPV [11][13]. It approves none of them. It covers licensed compounders only, so it does nothing for a "research use only" vial. Every date is in the FDA Peptide Tracker. The rules, category by category: Are Peptides Legal?
Sommar Club does not prescribe or sell any Category 2 or formerly Category 2 peptide. Read about them for what they are: BPC-157, TB-500, MOTS-c.
4 checks before anything goes in your body
A licensed US pharmacy makes it. Ask for its name and state. Look it up in that state's board of pharmacy database. FDA's BeSafeRx page links to every state's lookup, and FDA's advice if it isn't listed is to not use it [10].
There's a prescription with your name on it. A legitimate pharmacy requires one [10]. So does 503A compounding [3].
A clinician reviewed your history first. Some people shouldn't take a given peptide at all. Someone qualified has to read your answers.
It's labeled for people. "Research use only" fails this one by its own words.
One no, and close the tab. More questions for comparing sites: How to Choose an Online Peptide Provider.
Where sermorelin fits
Sermorelin is a prescription peptide with a US approval history. FDA approved brand sermorelin injections in 1990 and 1997. The maker stopped selling them in 2008, and in 2013 FDA found they were not withdrawn for reasons of safety or effectiveness [9].
Today licensed pharmacies compound sermorelin under 503A, with a prescription. Compounded sermorelin is not FDA-approved [1].
At Sommar, licensed US clinicians review your health history and prescribe sermorelin only if it's appropriate. Injections are $175 a month, or $119 for your first month with code FIRST40. Pay nothing unless approved. More: sermorelin, prescribed online and What Is Sermorelin?
2-minute online quiz. A clinician reviews it. Prescribed only if appropriate.
Button: See if you qualify → start.sommarclub.com/start-online-visit/sermorelin
FAQ
What is the difference between prescription and research peptides? A prescription peptide comes with a prescriber and either a drug maker or a licensed pharmacy. A research peptide is sold online for "research use only," with no prescription and no check for human use.
Are research peptides safe? Nobody can tell from the label. They aren't made or checked for people. FDA's stated concerns for many of these peptides include impurities and immune reactions [5].
Does "research use only" make it legal to sell? FDA hasn't treated it that way. In 2026 warning letters, FDA cited sellers using that label for marketing unapproved new drugs when their websites showed the products were meant for people [6][7].
Are compounded peptides FDA-approved? No. FDA does not review compounded drugs for safety, effectiveness or quality before they're sold [1][2].
Is BPC-157 a prescription peptide? Not an approved one. It isn't approved by FDA for any use and isn't on the 503A bulks list, as of FDA's May 14, 2026 list [4]. Since Oct 28, 2026, HHS's interim policy says it won't take action against licensed pharmacies, federal facilities or licensed physicians that compound BPC-157 acetate under its conditions [11]. That is enforcement discretion, and HHS can revise it.
Sources
FDA. Compounding and the FDA: Questions and Answers. https://www.fda.gov/drugs/human-drug-compounding/compounding-and-fda-questions-and-answers
FDA. Understanding the Risks of Compounded Drugs (content current as of Jun 22, 2026). https://www.fda.gov/drugs/human-drug-compounding/understanding-risks-compounded-drugs
Federal Food, Drug, and Cosmetic Act, section 503A. 21 U.S.C. 353a. https://www.govinfo.gov/content/pkg/USCODE-2022-title21/html/USCODE-2022-title21-chap9-subchapV-partA-sec353a.htm
FDA. Bulk Drug Substances Used in Compounding Under Section 503A of the FD&C Act (content current as of May 14, 2026). https://www.fda.gov/drugs/human-drug-compounding/bulk-drug-substances-used-compounding-under-section-503a-fdc-act
FDA. Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks (content current as of Apr 22, 2026). https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks
FDA. Warning letter 735127 (Aug 24, 2026). https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/peak-performance-peptides-735127-08242026
FDA. Warning letter 721806 (Mar 31, 2026). https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/gram-peptides-721806-03312026
Wang L, et al. Therapeutic peptides: current applications and future directions. Signal Transduct Target Ther. 2022. https://www.nature.com/articles/s41392-022-00904-4
FDA. Determination that sermorelin acetate injection products were not withdrawn from sale for reasons of safety or effectiveness. Docket No. FDA-2012-P-1071. Federal Register. Mar 4, 2013;78(42):14095-14096. https://www.govinfo.gov/content/pkg/FR-2013-03-04/pdf/2013-04827.pdf
FDA. BeSafeRx: Locate a State-Licensed Online Pharmacy (content current as of Nov 13, 2024). https://www.fda.gov/drugs/besaferx-your-source-online-pharmacy-information/locate-state-licensed-online-pharmacy
HHS. Enforcement Discretion Policy Regarding 503A Compounding Using Certain Peptide Bulk Drug Substances. Docket HHS-OASH-2026-0496, FR Doc 2026-22192 (filed for public inspection Oct 28, 2026; scheduled to publish in the Federal Register Oct 30, 2026). https://public-inspection.federalregister.gov/2026-22192.pdf
Bass Berry. FDA Advisory Committee Recommends Six Peptides for Compounding (Jul 31, 2026). https://bassberry.com/news/fda-advisory-committee-recommends-six-peptides-for-compounding-what-the-evaluation-criteria-tell-us-about-the-road-ahead/
Hyman, Phelps and McNamara, FDA Law Blog. The PEPTIDE-L Wave Reaches HHS: Enforcement Discretion … Not the Finish Line (Oct 28, 2026). https://www.thefdalawblog.com/2026/10/the-peptide-l-wave-reaches-hhs-enforcement-discretion-not-the-finish-line/
Sommar Club does not prescribe or sell BPC-157, TB-500, MOTS-c or any other Category 2 or formerly Category 2 peptide named here. Those sections are for education only. Prescription required. Compounded sermorelin is not FDA-approved. A licensed clinician decides if treatment is right for you. Individual results vary. Medical services provided by Wasef Health, PC.
