The short answer
Not clearly. Klaviyo's acceptable use policy lists the kinds of products you may not sell through its platform. Peptides are not named. Prescription medications, pharmaceutical products and medical therapies are. Whether your store falls under that line is decided by Klaviyo, at review time, not by you at signup.
That is why so many peptide brands sign up without trouble, build a list for a few weeks or months, and then find the account closed. Nothing in the signup flow asked them the question the review answers later.
The exact wording
This is the clause from Klaviyo's acceptable use policy, which carries the date “Updated: April 9, 2026”. Quoted as of 23 September 2026:
“You may not use the Services to offer products or services related to: ... Prescription medications, pharmaceutical products or services, medical therapies, telehealth, and other related technologies, products, or services.”
The same section adds a second line, also quoted as of 23 September 2026:
“In addition, we reserve the right to evaluate and restrict any use cases related to illegal or controlled substances in accordance with the policies and compliance standards of our downstream providers.”
Two things stand out. The word peptide does not appear anywhere in the policy. And the phrase “related to” is broad. A store does not have to sell a prescription drug to be related to pharmaceutical products in a reviewer's eyes. If your product pages look like they describe a drug, the reviewer can read them that way.
How Klaviyo reviews accounts
Klaviyo explains its account states in a help article titled Why is my account suspended or disabled? In short, it describes three cases:
- Disabled.The account was flagged by Klaviyo's verification and compliance team. The article says this typically happens when a new account first tries to send to a list of contacts it uploaded, and that you should hear back within one business day.
- Suspended. A paid subscription failed to charge several times. Updating the card re-enables the account.
- Plan limit. You tried to send more than your plan allows. The account is not suspended, but you need to upgrade before sending more.
The article also notes that while an account is disabled or suspended, flows switch to manual mode and segments stop updating. For a store, that means your abandoned cart and welcome emails stop the moment the review starts.
Separately, Klaviyo's terms of service (section 4.3) let it suspend, terminate or limit access when it decides the service is being used in breach of the agreement, which includes the acceptable use policy. Klaviyo does not publish the thresholds or signals its reviewers use, and we will not guess at them here.
What to do if your account is suspended
If you sell peptides and your account has been disabled after review, work through these steps in order.
- Ask for the reason in writing. Contact support from inside your account and ask which section of the policy they relied on. A written answer tells you whether this is a payment issue, a list quality issue or a category decision.
- Ask for your data.Request an export of your contacts and your suppression list: everyone who unsubscribed, bounced or marked you as spam. Klaviyo's terms (section 7.6) encourage customers to keep their own backups, and section 13.3 says Klaviyo has no obligation to keep your data after the agreement ends. Do not wait.
- Do not open a second account. The policy applies to every account, and you are still selling the same products. A new account puts that account at risk too, and it can make any appeal on the first one harder.
- Tell your store what changed.If flows were sending order and shipping updates, check that your store's own order emails are switched on while you move.
How to protect the list you have now
If your account is still live, the most useful thing you can do today takes ten minutes. Klaviyo documents how to export all people in your account: build a segment that includes everyone who can and cannot receive email, then export it to CSV. That file includes suppressed profiles, which is what you want.
Do it once a month and keep the file somewhere you control. Two rules matter when you use it later:
- Never send to the full export. It contains people who opted out. Klaviyo's own article warns against emailing that segment.
- Import the unsubscribes and bounces as unsubscribes and bounces wherever you go next, so nobody who said no hears from you again.
Moving to a platform that accepts peptide brands
If you are choosing a replacement, start with what each platform actually writes in its policy. We quote the current clauses side by side in which email platforms allow peptide brands and in our Klaviyo alternative for peptide brands guide. For a direct feature comparison, see Amino Engine vs Klaviyo.
Amino Engine is an email platform built for peptide brands on purpose. Mail leaves from your own domain, on servers and IP addresses we run, so no outside email provider sits above your account. New senders are warmed up over 42 days. WooCommerce connects today and Shopify is next. You can import the CSV you exported from Klaviyo, and unsubscribes and bounces carry over as unsubscribes and bounces. The step by step is in how to move from Klaviyo to Amino Engine, the full picture is on our email marketing for peptide brands page, and plans are on the pricing page.
Whatever you choose, the same rule applies everywhere: your product pages and your emails should describe research products, not treatments. No platform makes claims about human use safe.
This is general information, not legal advice.