FDA Warning Letter · #668918
Helix Chemical Supply: FDA Warning Letter (February 7, 2024)
Legal name: Synthetix Inc.
Helix Chemical Supply received this warning letter on February 7, 2024, from FDA’s Center for Drug Evaluation and Research | CDER. What it cites, and FDA’s own words where we matched them against the letter, are summarized below.
Primary Source
View the original FDA letter on fda.gov →
https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/synthetix-inc-dba-helix-chemical-supply-668918-02072024
Summary
- Company
- Synthetix Inc. (dba Helix Chemical Supply)
- Letter number
- #668918
- Issue date
- February 7, 2024
- Subject
- Unapproved New Drugs/Misbranded
What FDA cited
FDA's letter of February 7, 2024 cites Helix Chemical Supply for selling products FDA calls unapproved new drugs, under the subject line "Unapproved New Drugs/Misbranded". The GLP-1 drugs it names: semaglutide and tirzepatide.
As described below, your “Semaglutide” and “Tirzepatide” products are unapproved new drugs introduced or delivered for introduction into interstate commerce in violation of sections 505(a) and 301(d) of the Federal Food, Drug, and Cosmetic Act (FD&C Act), 21 U.S.C. 355(a) and 301(d).
How this letter sits against the other 159
Our reading, from the 160 letters on this register — not part of the FDA’s document.
2 letters on this register carry the date February 7, 2024, so this was a small group action rather than a mass sweep.
A warning letter is the agency putting a company on notice, not a court finding and not a ban. What it is worth to you is in what it alleges, so read the original on fda.gov rather than the fact that one exists.
This letter is one of a run to online sellers of research-use peptides: FDA warning letters to peptide sellers, 2023 to 2026.
FDA’s letter of February 7, 2024 to US Chem Labs also cites its recipient for selling products FDA calls unapproved new drugs.
From the letter
Read full letter on FDA.gov →Word for word, from the letter of February 7, 2024
This letter is to advise you that the United States Food and Drug Administration (FDA) reviewed your website at the Internet address www.helixchem.com in October 2023 and has observed that your website offers “Semaglutide” and “Tirzepatide” products for sale in the United States. As described below, your “Semaglutide” and “Tirzepatide” products are unapproved new drugs introduced or delivered for introduction into interstate commerce in violation of sections 505(a) and 301(d) of the Federal Food, Drug, and Cosmetic Act (FD&C Act), 21 U.S.C. 355(a) and 301(d). Furthermore, your “Semaglutide” and “Tirzepatide” products are misbranded drugs under section 502 of the FD&C Act, 21 U.S.C. 352, introduced or delivered for introduction into interstate commerce in violation of section 301(a) of the FD&C Act, 21 U.S.C. 331(a).
Despite statements on your product labeling marketing your products for “research use only” and “not for human consumption,” evidence obtained from your website establishes that your products are intended to be drugs for human use. Your products are drugs as defined by section 201(g)(1) of the FD&C Act, 21 U.S.C. 321(g)(1) because they are intended to prevent, treat, or cure disease conditions and/or affect the structure or function of the body. Examples of claims from the products’ labeling, including as observed on your website that establish the intended use of your products as drugs intended for human use include, but may not be limited to, the following:
“Dose Amounts Each vial contains: Weeks 1-4 – 8 doses (reconstituted vial expires after 8 weeks.) Weeks 5-8 – 8 doses (reconstituted vial expires after 8 weeks.) . . . Semaglutide is a derivative of the naturally occurring GLP-1, a peptide known to lower blood sugar levels and enhance insulin secretion. Research shows that Semaglutide may also improve heart, liver, and lung function while helping to slow or prevent the effects of Alzheimer’s disease.”
Tirzepatide “Dose Amounts Each vial contains: Weeks 1-4 – 4 doses Weeks 5-8 – 2 doses. . . Tirzepatide is a synthetic derivative of gastric inhibitory polypeptide (GIP) that has simultaneous glucagon-like peptide-1 (GLP-1) functionality.”
“If additional glycemic control is needed. . . This is the standard schedule for the medication, Mounjaro.”
Your “Semaglutide” and “Tirzepatide” products are not generally recognized as safe and effective for the above referenced uses and, therefore, are “new drugs” under section 201(p) of the FD&C Act, 21 U.S.C. 321(p). Subject to certain exceptions not applicable here, new drugs may not be legally introduced or delivered for introduction into interstate commerce without an approved application from FDA in effect, as described in sections 301(d) and 505(a) of the FD&C Act, 21 U.S.C. 331(d) and 355(a). No approved applications pursuant to section 505 of the FD&C Act, 21 U.S.C. 355 are in effect for these products. Accordingly, the introduction or delivery for introduction into interstate commerce of these products violates sections 301(d) and 505(a) of the FD&C Act, 21 U.S.C. 331(d) and 355(a).
Your “Semaglutide” and “Tirzepatide” products are also misbranded under section 502(f)(1) of the FD&C Act, 21 U.S.C. 352(f)(1), in that their labeling fails to bear adequate directions for their intended use(s). “Adequate directions for use” means directions under which a layman can use a drug safely and for the purposes for which it is intended, 21 C.F.R. 201.5. Prescription drugs, as defined in section 503(b)(1)(A) of the FD&C Act, 21 U.S.C. 353(b)(1), include those that, because of their toxicity or other potentiality for harmful effect, or the method of their use, or the collateral measures necessary for their use, are not safe for use except under supervision of a practitioner licensed by law to administer them. Your “Semaglutide” product is indicated for a condition that is not amenable to self-diagnosis and treatment by a layperson, therefore adequate directions cannot be written such that a layperson can use the product safely for its intended use. In addition, your “Semaglutide” and “Tirzepatide” products are also prescription drugs as defined in section 503(b)(1)(A) of the FD&C Act, 21 U.S.C. 353(b)(1)(A), in light of their toxicity or potential for harmful effects, methods of use, or collateral measures necessary for their use. For these reasons, your “Semaglutide” and “Tirzepatide” products are misbranded under section 502(f)(1) of the FD&C Act.
The introduction, delivery for introduction, or causing the introduction or delivery for introduction into interstate commerce of these misbranded drugs is a prohibited act under section 301(a) of the FD&C Act, 21 U.S.C. 331(a). Conclusion
Quoted word for word from the U.S. Food and Drug Administration. We assert nothing beyond what the agency published, and the full letter is at https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/synthetix-inc-dba-helix-chemical-supply-668918-02072024
What FDA warning letters mean
It is the agency writing to a company to say it believes something that company is doing breaks the Federal Food, Drug, and Cosmetic Act — usually a claim on a website, a labeling choice, or how a drug is being made. The company has about fifteen working days to write back.
Read carefully what it is not. It is not a recall, not a criminal charge, and not a court deciding anyone broke the law. It is the regulator opening a file. Companies frequently answer a letter, fix what was cited, and carry on trading, and when FDA accepts that it can issue a close-out letter. We do not track close-outs, so the presence of a letter on this page tells you what FDA said on one date — not where the matter stands today. Ask the company; they will usually tell you, and how they answer is informative in itself.
Across this market the same three citations recur: claiming a compounded product is equivalent to an approved one, labeling that misleads, and compounding from bulk substances FDA has not cleared under sections 503A and 503B. If you are reading a letter here, it is probably one of those.
Where to get GLP-1 online, safely: sellers our editors have checked
These are telehealth sellers our editors have checked. For each one we hold a price, the form the drug comes in, and the states it reaches.
No insurance needed · vetted by our editors
Some of the links on this page earn us money. If you sign up with a provider after following one, that provider may pay GLP Watchdog a commission. Learn more
Embody
A flat compounded tirzepatide or semaglutide price at every dose, from a seller that names its pharmacies
From $79/mo
Get started →Collective
Flat any-dose pricing, if you can absorb a $199 annual membership on top
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Microdosed compounded GLP-1s from a longevity clinic, or brand Wegovy at manufacturer pricing plus monitoring
From $99/mo, prepaid
Get started →Other warning letters in our database
- RonanRx — October 30, 2026
- Lyfe Rx — September 9, 2025
- Hcg Institute — September 9, 2025
- HealBerry — September 9, 2025
- MedClub by Dr. Jenn — September 9, 2025
Editorial Disclaimer
This is a public communication from a regulator, and by itself it settles nothing about whether the company broke any law. Corrective action is a common response, and a fair number of letters end in a close-out. Read the whole thing on fda.gov through the link above rather than taking our excerpt as the full picture.
Glossary
The words sellers use, defined. Tap any term.
- Compounded GLP-1 · Pharmacy and drug forms
- 503A pharmacy · Pharmacy and drug forms
- 503B outsourcing facility · Pharmacy and drug forms
- PCAB accreditation · Pharmacy and drug forms
- FDA Warning Letter · Insurance and regulatory
- Off-label use · Insurance and regulatory
- FDA Drug Shortage List · Insurance and regulatory