Question 1

Where do your peptides come from?

Accepted Answer

All peptides on our marketplace come from FDA-registered 503A and 503B compounding pharmacies. Every pharmacy partner has been thoroughly vetted to ensure the highest quality for those who purchase through our platform.

Question 2

Do you provide COAs (Certificates of Analysis)?

Accepted Answer

Yes. Every product on Stack comes with third-party testing and COAs available for review.

Question 3

How is this different from grey market peptides?

Accepted Answer

Grey market vendors are unregulated. You don't know what you're getting. Our pharmacy partners are FDA-registered, follow USP 795/797 standards, and provide full documentation on purity and potency.

Question 4

Do I need a prescription?

Accepted Answer

Yes. All peptides on Stack require a prescription from a licensed physician. Our telehealth partners make this process seamless within the app.

Question 5

Is this legal?

Accepted Answer

Yes. Stack works exclusively with licensed telehealth providers and FDA-registered compounding pharmacies. Everything is prescribed and dispensed through proper medical channels.

Question 6

What about Category 2 peptides like BPC-157?

Accepted Answer

We only sell peptides that are legally compoundable. As regulations shift, we update our marketplace accordingly.

Question 7

What standards do your pharmacy partners follow?

Accepted Answer

All pharmacy partners are USP 795/797 compliant, PCAB accredited where applicable, and maintain cold-chain shipping protocols to ensure stability and potency from production to delivery.

Question 8

Do you work with 503A or 503B pharmacies?

Accepted Answer

Both. 503A pharmacies compound patient-specific prescriptions. 503B outsourcing facilities can produce larger batches under stricter FDA oversight. We work with both depending on the peptide and your location.

Question 9

How do you vet your pharmacy partners?

Accepted Answer

We review licensing, inspection history, testing protocols, and quality control processes. Not every pharmacy makes the cut. If they can't prove quality, they're not on the platform.

Question 10

Are your peptides tested for purity?

Accepted Answer

Yes. All peptides undergo third-party testing for purity, potency, sterility, and endotoxins. COAs are available for every product.

Question 11

What's the difference between research peptides and pharmaceutical-grade?

Accepted Answer

Research peptides are sold "not for human use" with no quality guarantees. Pharmaceutical-grade peptides from 503A/503B pharmacies are produced under FDA oversight, prescribed by a licensed physician, and tested for safety.

Question 12

Why are some peptides so much cheaper elsewhere?

Accepted Answer

You get what you pay for. Cheap peptides often have low purity, unknown fillers, or no testing. Grey market vendors have shown purity as low as 30%. Quality costs more because it requires real testing, proper facilities, and regulatory compliance.

Frequently Asked Questions

Quality & Sourcing

Legal & Prescriptions

Pharmacy Standards & Testing

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