Quick answer
The biggest red flags are promises of guaranteed results, claims to treat medical conditions, secret or proprietary blends with no amounts, fake countdown timers, and anonymous testimonials. Sexual-enhancement supplements have also been found by the FDA to contain hidden drug ingredients, so transparency matters more than bold copy.
Why this corner of the store is different
Few product categories lean on embarrassment as hard as this one. The ad knows you might not ask a friend, so it offers a private, discreet answer with a timer ticking beside it. That emotional setup is the real product being sold, and it is worth noticing before you look at a single ingredient.
The signs below are not a verdict on any one brand. They are a checklist you can run on any bottle, including ones we cover, like Strong Peak.
It also helps to separate the two jobs an ad is doing. One job is informing you; the other is moving you toward a checkout button. Copy that spends more words on how you will feel than on what is in the bottle is mostly doing the second job.
Red flag one: the words that should not be there
Supplements in the US cannot legally claim to cure or treat disease. So when copy talks about "fixing" erectile problems, "restoring" hormones or "guaranteed" performance, it is either overreaching or hoping you will not notice.
- Guaranteed results. Bodies vary. Honest sellers can offer a refund, not a result.
- "Clinically proven" with no study named. If the study is real, it has a title and a link.
- Before and after photos. Easy to stage, impossible to verify.
- "FDA approved" supplements. Supplements are not approved the way drugs are.
A related trick is the borrowed authority: a white coat in a stock photo, a vague mention of "doctors recommend" or a logo from a magazine that never reviewed the product. None of these is evidence. A real expert has a name, a credential you can look up and a reason to be there other than a fee.
Red flag two: the formula you cannot read
A "proprietary blend" listing five plant extracts and no milligrams tells you almost nothing. The label may be accurate and still useless for judging a dose. Look for amounts per serving, a clear serving size and, ideally, a third-party testing statement.
This applies broadly. Many products in this space, including some that name familiar botanicals like Tongkat Ali, Tribulus or Maca, do not publish amounts. The research on those plants for sexual-health topics is limited or mixed, so a long ingredient list is not evidence of anything by itself. Our ingredient guide shows how to read such a list honestly.
Ask one more question of any label: who tested this, and what did they test for? Identity, purity and contaminants are different checks. A seal from an independent lab is a decent sign, and the absence of one is not damning, but it should lower your confidence a notch.
Red flag three: the hidden-ingredient problem
This one is serious. Over the years, the FDA has warned that some sexual-enhancement products sold as supplements contained drug ingredients that were not listed on the label. For a man taking nitrates or blood pressure medicine, an undeclared drug can be dangerous.
You cannot taste or see this risk, which is why it deserves respect. Be extra wary of products that promise dramatic, fast effects, arrive in unmarked packaging or are sold only through gas stations and pop-up sites. The FDA's supplement pages explain how to report problems. If you take any heart or blood pressure medicine, read our guide on supplements and heart medicines first.
Red flag four: pressure you can feel
Countdown clocks that reset when you refresh, "only 3 left" banners and stacked bonuses are designed to shorten your thinking time. Limited-time offers are not automatically dishonest, since real promotions exist, but a product worth buying today will usually still be worth buying after a night's sleep.
A calm test: close the tab and come back tomorrow. If the price vanished, you learned something about the offer. If it did not, you learned something too.
Watch for bundles, too. Buying six bottles to unlock free shipping can be fair value for someone who already knows they like a product, but it is a lot of inventory to commit to before you know. If a deal asks you to buy more of something you have never tried, lean on the refund terms, and read them first.
Red flag five: praise with no person behind it
First names with no last names, perfect grammar and a suspicious love of the product's slogan are worth a raised eyebrow. We cover this in more depth in our piece on spotting fake supplement reviews, but the short rule is simple: praise you cannot trace is decoration, not evidence.
Be careful with influencer content, too. A video that sounds like a candid chat may be a paid placement, and disclosure is often buried in a hashtag. If someone benefits when you click, weigh their enthusiasm accordingly, and apply the same rule to affiliate sites like this one.
What a better pitch looks like
Green flags are quieter. They include a clear ingredient list with amounts, plain statements about what the product is not, hedged language about results, easy-to-find refund terms, a real company address and a suggestion to talk to your doctor, especially if you take medicines or have a medical condition.
No checklist makes a supplement effective. It only helps you avoid the worst surprises. For anything tied to sexual function, hormones or circulation, a clinician can test and treat causes in ways a gummy or capsule cannot.
A final habit: write down the single claim that made you want the product, then look for the sentence that supports it. If the page cannot show you one, the claim was borrowed from your own hopes.