Selling Male Enhancement Supplements? Know What's in the Capsule

Most supplement categories are underwritten on how they sell: card-not-present orders, subscription offers, refund rates. Male enhancement adds a question underwriters rarely ask of a protein powder or a multivitamin, which is whether the product contains what the label says and nothing else. The reason is a long federal record of "natural" sexual enhancement products that turned out to contain the active ingredients of prescription erectile dysfunction drugs. A product like that is not a dietary supplement in law, selling it is not a legal transaction, and both Visa and Mastercard bar illegal transactions from their networks.

This guide is for brands, private-label sellers and online retailers of male enhancement and sexual wellness supplements. It covers what the FDA keeps finding in the category, why a hidden drug ingredient changes the legal status of the whole product, what the card network rules say about illegal sales, where marketing claims cross from supplement into drug, and what to have ready before you apply. Rules and sources are cited as they stood in mid-October 2026.

What the FDA keeps finding

The FDA keeps a running list of tainted sexual enhancement and energy products. The products on it are often advertised as dietary supplements, foods or all-natural treatments, and FDA laboratory analysis found drug ingredients that are not on the label. The agency is explicit about the limits of the list: it says the list covers only a small fraction of the contaminated products on the market, and that a product's absence from it does not mean the product is safe. The list was last updated on September 25, 2026.

The products take more forms than capsules. Notifications in 2026 alone have covered a chocolate bar in February and, in July, a brand's honey and capsule products. In April 2026 the FDA said laboratory analysis of WAP Sensual Enhancement, sold for sexual enhancement on websites including eBay, found sildenafil, tadalafil and flibanserin that were not on the label. In an update on August 25, 2026 it said further samples bought from retail stores contained undeclared yohimbine, tadalafil and flibanserin.

The drugs that turn up most often are sildenafil and tadalafil, the active ingredients in Viagra and Cialis. The FDA's standard warning explains why that is dangerous rather than merely deceptive: these ingredients may interact with nitrates found in some prescription drugs, such as nitroglycerin, and may lower blood pressure to dangerous levels. A customer on heart medication who buys a herbal product has no reason to expect that interaction.

Enforcement does not stop at the brand. In December 2023 the FDA sent a warning letter to Amazon after buying seven products on its website that were labeled as energy-enhancing supplements or food, including several sold to men, and finding undeclared sildenafil or tadalafil in them. The letter held Amazon responsible for introducing the products into interstate commerce, noting that all seven were delivered through its Fulfillment by Amazon service. Resellers and fulfilment partners sit in the same chain as the manufacturer.

The criminal cases are larger. In July 2026 a Henderson, Nevada man pleaded guilty in federal court to introducing a misbranded drug into interstate commerce and to mail fraud. According to the U.S. Attorney's Office, he imported hundreds of thousands of capsules and tablets containing sildenafil and tadalafil from unregistered manufacturers in India, had them labeled "100% Natural" with false ingredient lists and the claim that no prescription was needed, and sold them to smoke shops, convenience stores and adult novelty stores across the Southwest and online through his own website. He made more than $1.9 million from the sales. Sentencing was scheduled for October 19, 2026.

Why a hidden drug is a legal problem, not a labeling slip

Federal law defines what a dietary supplement can be. Under section 201(ff)(3)(B)(i) of the Federal Food, Drug, and Cosmetic Act, a product is not a dietary supplement if it includes an article approved as a new drug, unless that article was marketed as a supplement or food before the drug was approved. The FDA approved Viagra on March 27, 1998 and Cialis on November 21, 2003, and neither active ingredient was sold as a supplement before then. A capsule containing either one is therefore not a supplement at all, whatever the label says.

What it is instead is set out in the FDA's warning letters: an unapproved new drug under section 505(a) of the Act and a misbranded drug under section 502, including because its labeling fails to disclose the drug ingredient. Introducing it into interstate commerce is prohibited. None of that turns on what the label says. The FDA's letters rest on what laboratory analysis found inside the products.

That is why an underwriter treats this category differently from other supplements. With most products, the risk the bank is pricing is chargebacks. Here there is a second risk, which is that every transaction the merchant processes is a sale of an illegal drug, and the merchant may not know it.

What the card networks do with illegal sales

Both networks write the legality requirement directly into their rules.

The Visa Core Rules (18 April 2026) state that a transaction must be legal in both the cardholder's jurisdiction and the merchant outlet's jurisdiction. Visa reserves the right to permanently prohibit a merchant, and one or more of its principals, from the Visa system, and lists among the reasons non-compliance with the Visa Integrity Risk Program, including entering illegal or brand-damaging transaction activity.

The Mastercard Rules (2 June 2026), at section 5.12.7, prohibit a merchant from submitting any transaction that is illegal, and name the sale of a product other than in full compliance with applicable law as a violation. The consequences fall on the acquiring bank first. An acquirer that is notified and fails to stop the practice promptly faces a franchise review or a third-party audit at its own expense. An acquirer found in violation can be assessed USD 200,000 for each merchant involved, or USD 2,500 per day where it can show the practice began less than 80 days before Mastercard notified it. Mastercard may also list the merchant on MATCH Pro.

MATCH is the list acquirers check before they open an account. Mastercard's Security Rules and Procedures (4 August 2026) include reason code 13, Illegal Transactions, for a merchant that was engaged in illegal transactions, and MATCH records stay on the system for five years. Our guide to checking the MATCH list explains what a listing does to future applications.

Put together, the incentives are plain. An acquiring bank that boards a male enhancement brand selling a tainted product faces assessments and an audit, and the merchant faces termination and a five-year listing. That is the risk an underwriter is trying to rule out when it asks what is in your product.

Where "performance" becomes "potency"

A clean product can still be sold as a drug. Under the FD&C Act, a supplement may make structure/function claims, but not claims to diagnose, treat, cure, mitigate or prevent a disease. The FDA's regulation at 21 CFR 101.93 requires the familiar disclaimer on any structure/function claim, which says the statement has not been evaluated by the FDA and the product is not intended to diagnose, treat, cure, or prevent any disease, and requires the manufacturer, packer or distributor to notify the FDA within 30 days of first marketing a product that bears such a claim.

For this category, the FDA drew the line in the preamble to its January 2000 final rule on structure/function claims (65 FR 1031). It said "arouses or increases sexual desire and improves sexual performance" is an acceptable structure/function claim because it does not imply treatment of a disease. Claims such as "helps restore sexual vigor, potency, and performance" and "builds virility and sexual potency" are disease claims, because the word potency implies treatment of impotence, which is a disease. The FDA added that such claims could be acceptable if they made clear they were intended solely for decreased sexual function associated with aging.

The disclaimer does not rescue a claim that is otherwise misleading. The FTC's Health Products Compliance Guidance, issued in December 2022, says health benefit claims need competent and reliable scientific evidence, describes randomized, controlled human clinical trials as generally the type of substantiation experts would require, and states that the DSHEA disclaimer will not cure an otherwise deceptive ad. Advertisers are also responsible for what customer testimonials imply, so a reviewer saying a product worked like a prescription is a claim you have to be able to support.

An underwriter reads your product pages, ads and reviews the way a regulator would. Comparisons to Viagra or Cialis, claims that a product works "like a prescription", promises about erectile dysfunction, or before-and-after testimonials are the kind of language that turns an application into a decline.

Subscriptions are the other half of the review

Many male enhancement offers are sold as a trial that converts into monthly shipments, and that billing model carries its own card network and FTC rules on disclosure, reminders and cancellation. Our guide to free trial and subscription billing rules covers them in detail. In short, an underwriter will look for the price, the billing interval and the cancellation method on the checkout page itself, not only in the terms, and for an online way to cancel an order that was placed online.

What to have ready before you apply

If your product is clean and your claims are supportable, the application is about showing both. A careful underwriter may ask for:

1. The name and address of the manufacturer, and whether it operates under the FDA's current good manufacturing practice rules for dietary supplements (21 CFR Part 111). Those rules require, with limited exceptions, at least one appropriate test to verify the identity of every dietary ingredient.
2. Recent certificates of analysis for each finished product, ideally from an independent laboratory, including screening for undeclared PDE-5 inhibitors such as sildenafil and tadalafil and their analogues.
3. Final labels and the full ingredient list for every SKU, matching what the website shows.
4. Every URL you sell from, and the ads and landing pages that drive traffic to them, including affiliate pages.
5. Your claim substantiation file: the studies you rely on for each benefit you state.
6. Your trial, subscription and cancellation terms as the customer sees them at checkout.
7. Processing statements from any current or previous account, and an explanation of any account that was closed.

Two practical points follow. First, keep your own testing current. A product that tested clean when you launched it can change when the manufacturer changes its ingredient supplier, and you remain the seller of record. Second, do not split a product line across storefronts or accounts to keep it away from review. Running sales for one product through an account approved for another is what the card networks call transaction laundering, and Visa lists laundering among its reasons to prohibit a merchant. Our guide to transaction laundering explains how that plays out.

The short version

• The FDA keeps finding sildenafil, tadalafil and other drugs in products sold as male enhancement supplements, and says its list is only a small fraction of what is on the market.
• A product containing an approved drug ingredient is not a dietary supplement. It is an unapproved, misbranded drug, and selling it is illegal.
• Visa and Mastercard both prohibit illegal transactions. Mastercard can assess the acquirer and list the merchant on MATCH for five years.
• Claims about "potency" or treating erectile dysfunction are disease claims under the FDA's rule, and a disclaimer does not cure a deceptive ad.
• Independent lab testing, a substantiation file and transparent subscription terms are what a clean application looks like.

PayKings underwrites male enhancement and sexual wellness supplement merchants as a named category. If you have the documentation above, we can tell you quickly what can be placed. We do not give legal advice, and whether a specific claim or formula complies with FDA and FTC rules is a question for your regulatory counsel.