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Eleven questions to ask before you buy compounded semaglutide

There is a real difference between a licensed 503A pharmacy with a prescriber behind it and a website selling vials labelled 'not for human consumption'. Most people cannot tell them apart, and the marketing is designed that way.

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Dr. Nick Robertson

Founder & Editor

Published
Reading time
5 min read
Medically reviewed
Clinically reviewed

I am not going to tell you not to do this.

Millions of Americans who clinically qualify for these medications cannot get them covered, cannot afford the list price, and are not going to accept that as an answer. Lecturing them about it has accomplished nothing in three years and it is not medicine, it is moralising.

What I can do is tell you what separates a defensible source from a dangerous one, because the marketing has been carefully constructed so that you cannot see the difference.

The three tiers, which get deliberately blurred

Tier one: a licensed 503A compounding pharmacy. State-licensed, requires a prescription for an individually identified patient, subject to state board of pharmacy oversight and USP compounding standards.

Tier two: a 503B outsourcing facility. Registered with the FDA, inspected against current good manufacturing practice, permitted to make larger batches. Higher regulatory bar.

Tier three: everything else. Websites selling vials of “research peptides,” labelled not for human consumption, shipped from anywhere, with no prescriber, no pharmacy licence, and no legal obligation to anyone. The disclaimer is not a formality — it is how they stay outside the framework that would otherwise apply to them.

Tier three is frequently designed to look like tier one. Clean website, white coat photography, a “medical team,” a checkout flow that resembles telehealth. The tell is almost always in what is absent rather than what is claimed.

“Not for human consumption” is not a technicality. It is the seller telling a regulator, in writing, that whatever happens to you is not their problem.

The eleven questions

Ask them in writing. A legitimate operation answers all eleven without difficulty. Anything that deflects, delays, or answers a different question has told you what you needed to know.

  1. What is the pharmacy’s name and state licence number? Then verify it independently with that state’s board of pharmacy. Do not accept a screenshot.
  2. Is it a 503A pharmacy or a 503B outsourcing facility?
  3. Who is the prescriber, and are they licensed in my state? A named individual, not “our medical team.”
  4. Is the active ingredient base semaglutide, or a salt form? Sodium and acetate salts are not the same active ingredient as what is in approved products, and the FDA has warned about them specifically.
  5. Where is the active pharmaceutical ingredient sourced, and is that facility FDA-registered?
  6. Can I see a certificate of analysis from an independent laboratory for my batch? Potency and sterility, from a lab that is not the seller.
  7. What exactly is in the vial besides the drug? Some compounded products add B12 or other substances. You should know why, and consent to it.
  8. What concentration is it, and is the dose fixed or do I calculate it? This is the safety question that matters most in practice.
  9. What is the beyond-use date, and how should it be stored?
  10. Who do I call at 2 a.m. with a reaction, and is there a licensed pharmacist on the line?
  11. What is the process if a batch is recalled, and how would I be contacted?

Red flags that should end the conversation

  • No prescription required, or a “consultation” that is a form with no human reviewing it
  • Prices that make no sense — a year of medication for the cost of a month
  • Any variation of “research use only” or “not for human consumption”
  • Sold as a powder you reconstitute yourself
  • No named pharmacy, no licence number, no physical address
  • Payment by cryptocurrency, wire transfer, or peer-to-peer app only
  • Bulk discounts, subscription lock-ins, or affiliate codes from influencers
  • Claims that it is “the same as Ozempic” — no compounded product is the same as an FDA-approved one, by definition

Tell your actual doctor

The thing I most want from anyone reading this: put it in your record.

I have had patients arrive with unexplained gastrointestinal symptoms, abnormal liver tests, or a hospital admission, and the compounded GLP-1 they had been taking for seven months came up on the third visit because they were embarrassed. That is a genuinely dangerous silence, and it is one created by clinicians who moralise rather than listen.

You will not be reported. You will not be dropped. The information changes the differential diagnosis, and withholding it is more dangerous to you than any pharmacy is.

Bring dates rather than impressions. Which pharmacy, which lot number if you have it, what concentration, what dose, and when each symptom began. That record is what makes an adverse event traceable at all, and it is the difference between a clinician who can help you and one who is guessing in front of you. Keep it wherever you will genuinely keep it — Zenday is designed for this and will hold a lot number alongside the dose, which paper does badly.

The thing underneath all of this

Every one of these eleven questions exists because the approved product costs more than a car payment and a large share of Americans who need it cannot get it covered.

The gray market is a symptom. Treating the symptom carefully is worth doing. It is not the same as treating the disease.

Common questions

Compounding is a legitimate, regulated part of US pharmacy practice. Compounding a copy of a commercially available FDA-approved drug is generally restricted, with a specific allowance when that drug is on the FDA shortage list. When shortages are declared resolved, that allowance narrows.
What is the difference between a 503A and a 503B pharmacy?
A 503A is a traditional compounding pharmacy preparing medications for individually identified patients with a prescription. A 503B is a registered outsourcing facility that can produce larger batches and is subject to FDA inspection under current good manufacturing practice standards.
What is semaglutide sodium and is it the same drug?
Semaglutide sodium and semaglutide acetate are salt forms. The FDA has stated that salt forms are different active ingredients from the base semaglutide used in approved products, and has warned against their use in compounding.
Why are dosing errors so common with compounded GLP-1s?
Branded pens deliver a fixed dose. Compounded products often arrive as a vial at a concentration the patient must convert into units on an insulin syringe. Tenfold errors and unit confusion are the most consistently documented harm in this market.

Sources

  1. 01

    US Food and Drug Administration. Medicines containing semaglutide marketed for type 2 diabetes or weight loss.

  2. 02

    US Food and Drug Administration. Compounding and the FDA: questions and answers.

  3. 03

    US Food and Drug Administration. Drug shortage database.

Editorial standards

Written by Dr. Nick Robertson, MD. Clinical content last checked August 3, 2026. On The Jab takes no money from pharmaceutical companies, telehealth platforms or compounders, and uses no affiliate links. Read our policy.

This article is journalism and general education, not medical advice. Talk to your own clinician before changing any treatment.

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