Male Enhancement Products: Types, Claims and Evidence

Male enhancement products cover a wide range of options, from supplements and creams to pumps, devices, and prescription medications. The important thing to know is that these products aren’t all created equal. Some are medically approved for specific uses, while others have little research to support the claims made about them.

A 2020 review published in Sexual Medicine Reviews found that research on nonsurgical enlargement methods is limited, with many studies involving small groups of participants. In other words, even when a product shows some potential, there often isn’t enough evidence to know how well it works or what results people can realistically expect.

Supplements deserve a closer look, too. An analysis of peer-reviewed analysis of FDA enforcement data found that sexual enhancement supplements were more likely than weight-loss or muscle-building supplements to contain hidden prescription drug ingredients. This doesn't mean every supplement is unsafe, but it does make it worth looking beyond the marketing claims.

In this guide, we’ll break down the research behind popular male enhancement products, explain how supplements and devices differ from prescription treatments, and cover what to know about using each option safely.

The first step is understanding what type of product you’re considering and what the evidence says about it. A prescription medicine and a medical device go through government review before they can legally make a treatment claim. A dietary supplement, which is how most pills, powders, and gels sold as male enhancement are classified, does not. FDA's consumer guidance on hidden ingredients states plainly that dietary supplements aren't approved by the agency for safety or effectiveness before they're sold, so a bottle that says "clinically tested" or "doctor recommended" is making its own claim, not reporting an independent finding.

Next, look at the research behind a product’s claims. If a company promises specific results, check whether those numbers come from actual studies and how reliable that research is. For example, some nonsurgical devices have shown modest increases in length in small studies, but that doesn’t mean everyone can expect the same results. The more a product promises without explaining the evidence behind it, the more skeptical you should be.

Pills and oral supplements marketed for male enhancement are generally regulated as dietary supplements rather than medications, so they don’t go through the same approval process as prescription ED treatments. Research published in 2018 that examined FDA enforcement data from 2007 to 2016 found that sexual enhancement products accounted for 45.5% of 776 supplements identified as containing hidden drug ingredients. Of those sexual enhancement products, 47% contained ingredients from the same drug class used in prescription ED medications.

These findings don’t mean all male enhancement supplements are unsafe, but they do highlight why it’s worth looking beyond marketing claims. When a product describes itself as “clinically proven,” check whether there’s solid research to support that promise.

Topical creams, gels, and oils marketed for male enhancement are also widely available, but there’s little reliable research showing whether they deliver on their promises to increase size or improve performance. That doesn’t necessarily mean they can’t have any effect; it means there isn’t enough good evidence to know. As with supplements, it’s worth checking the ingredients and being cautious about products that make big claims without solid research to back them up.

Vacuum pumps use a cylinder and a pump to draw blood into the penis, creating an erection through vacuum pressure rather than medication. Not all pumps are designed for the same purpose. Some pumps are designed for specific medical purposes, while others are sold as pleasure accessories for personal use. Adam & Eve's penis pumps fall into the second category. They're designed and sold as pleasure and novelty products, not medical devices, and nothing here should be read as a medical claim about them. On the size question specifically, the same 2020 review found that vacuum devices did not increase size among men with typical, normal-range size who were evaluated for enlargement rather than for erectile dysfunction.

Cock rings and constriction rings are elastic or rigid rings worn at the base of the penis to help maintain an erection, often paired with a pump or used on their own. Cock rings are designed to enhance sensation and help maintain an erection, not to increase penis size. When choosing and using one, comfort and proper fit are the most important things to keep in mind. Adam & Eve's penis rings are sold on that same basis: fit and sensation, not enlargement.

Sleeves and extenders actually cover two different products with two different jobs. Novelty sleeves, like the enhancer sleeves Adam & Eve carries, add girth or texture for sensation during sex. That's a pleasure claim, not a permanent-enlargement claim, and no source supports treating a novelty sleeve as a way to change your body. Traction-style extenders are a separate product, worn to gently stretch the penis over time, and they're the one nonsurgical method with any directly sourced positive finding in the research: the same 2020 review found extenders increased flaccid length, but by less than 2 centimeters, in a small group of lower-quality studies of men seeking enlargement. That's a real, bounded finding, not a guarantee, and it has nothing to do with pleasure sleeves. If sensation and fit are what you're after, Adam & Eve's penis enhancers are built for that, not for permanent size change.

Manual stretching techniques, sometimes called "jelqing," have no reliable controlled-trial evidence behind them either. The same body of research that covers extenders describes aggressive manual technique as a reported source of injury rather than proven benefit, so there's no basis here for recommending it.

Prescription medicine is a separate category altogether. FDA-approved ED medicine belongs to a prescription drug class called PDE5 inhibitors, available only after a clinician evaluates you, which is a meaningfully different thing from an over-the-counter product marketed as enhancement. Surgical and injectable approaches for enlargement exist too, but they carry higher complication rates and are generally treated as a last resort, a decision for a reader and their doctor rather than something a retail guide can responsibly recommend.

There are two important safety tips to keep in mind when using these products.

First: talk with a doctor or pharmacist before combining an over-the-counter sexual-enhancement supplement with a nitrate medication or any blood pressure medication, or if you're managing diabetes, high cholesterol, or heart disease. This isn't a generic caution. Because supplements in this category aren't reviewed by FDA before they reach a shelf, some have been found to secretly contain a prescription-strength ingredient from the same drug class used in ED medicine, and FDA's recall notice for one supplement brand warned that combining that hidden ingredient with nitrate or blood-pressure medication "could lower blood pressure to dangerous levels that could be life threatening." If any of those conditions or medications apply to you, check with a clinician before trying an unregulated enhancement supplement.

Second: don't wear a cock ring or constriction ring for longer than about 30 minutes, and take it off right away if you notice pain, numbness, or a change in color, according to the International Society for Sexual Medicine. Left on too long, a ring can cause lasting tissue damage, so don’t keep wearing it just to finish what you’re doing. The same guidance also recommends avoiding metal rings specifically, since they can't stretch or be cut off quickly if you need to remove one in a hurry. A stretchy or quick-release ring gives you an easier way out if something doesn't feel right.

When it comes to male enhancement, the research varies depending on the product. Some options have evidence supporting specific benefits, while others simply haven't been studied well enough to know whether they deliver the results they promise. Here's what we know about the most common options.

Pills, supplements, creams, and manual stretching

There isn't strong, reliable evidence that these products or techniques increase penis size or consistently improve sexual performance. You may see products advertised as "clinically proven," but that phrase alone doesn't tell you whether independent research supports the claim. It's worth looking at the actual studies before taking marketing promises at face value.

Penis extenders

Traction-style extenders are one area where research has shown some potential. A 2020 review published in Sexual Medicine Reviews found a small increase in flaccid length in studies of men seeking enlargement. However, the studies were limited in size and quality, so the results shouldn't be taken as a guarantee. These findings also apply to traction devices specifically, not every product marketed for enhancement.

Vacuum pumps

Vacuum pumps can help create an erection by drawing blood into the penis, which is different from permanently increasing its size. The same 2020 review found no significant size increase among men with typical penis size who used pumps for enlargement. In short, pumps can have a useful purpose, but permanent enlargement isn't a benefit supported by this research.

Creams and gels

Topical products marketed for male enhancement haven't been studied well enough to establish whether they increase size or improve sexual performance. That doesn't automatically mean every product is ineffective, but there isn't enough reliable evidence to promise results. Be cautious about claims that sound more certain than the research allows.

Male enhancement products come in many forms, and the best choice depends on what you're looking for. Whether you're interested in exploring new sensations, finding ways to feel more comfortable, or learning about products designed to support erections, understanding what each option is designed to do can help you find the right fit.

If comfort and pleasure are your priorities, products like cock rings, pleasure sleeves, pumps, and lubricants may be worth exploring. Each offers a different experience, so consider what appeals to you and what feels right for your needs.

Browse Adam & Eve's Lubes and Sexual Wellness collection to explore lubricants and other products designed to support comfort and enjoyment. Whatever you choose, focus on what feels good for you rather than on promises of results that the evidence doesn't support.