Why GLP-1s Impact on Erectile Dysfunction is Mixed?
May 31, 2026
When a man is carrying an excess amount of weight and particularly abdominal belly fat, there is a higher risk of erectile dysfunction. So, it is important to understand how changes to one’s body mass index (BMI) is a key indicator that losing even modest amounts of weight can help to restore endothelial function for improved sexual performance. Indeed, obesity goes a step further, as this weight-related disease compromises a man’s vascular health.
Glucagon-like peptide-1 (GLP-1) is a gut hormone that is naturally produced by the body to slow the gastric emptying of food into the intestinal tract. This appropriately signals the brain to release several hormones that work closely together to manage appetite by telling your body that it is time to stop eating. Also released in the small intestine, peptide tyrosine tyrosine (PYY) reduces the release of the hunger hormone (ghrelin), and the satiety hormone leptin verifies your body has sufficient fat stores to stop eating.
Recent studies suggest that up to 79% of men with ED are overweight, and being overweight or obese can increase one’s risk of developing erectile dysfunction up to 90%, so packing on the pounds can make a huge difference in a man’s sexual performance. Moreover, carrying excess weight can negatively impact self-concept and body image, which can cause stress, lead to depression, and both are psychological barriers that can easily contribute to erectile issues.
Fortunately, if your ED is caused by unintended weight gain from belly fat, it is likely reversible. Experts say that losing just 10% of your body weight can significantly improve erectile function. Since healthy erections rely heavily on the network of blood vessels that pump blood into the penis, fat deposits can cause atherosclerosis where the weight gained leads to plague build up in penile arteries and blood vessels struggle to dilate properly. After all, arteries supplying the penis are very small and atherosclerosis often shows up in the bedroom first.
Are male hormonal imbalances related to weight?
Yes. In fact, unintended fat gain can create a self-perpetuating cycle where excess weight suppresses testosterone production and release. Often called Low-T, the lower levels of testosterone can make it even more difficult to lose visceral fat deposits and maintain critical muscle mass that is the body’s primary engine for utilizing fat for energy. For example, as you exercise, your body breaks down stored fat into fatty acids. These lipids travel through the bloodstream and are used by your muscle tissue as energy. Since muscle tissue is metabolically active, having more muscle raises your basal metabolic rate (BMR) for increased calories burned throughout the day and even when your body is at rest. With that said, adding strength training helps to ensure the weight you lose is indeed fat and not crucial muscle mass, as stored body fat becomes the fuel your muscles consume during physical activities.
How GLP-1 Receptor Agonists Level the Playing Field
GLP-1 is a gut incretin that is released by the body in response to food intake, but only in small amounts for a few minutes to signal the brain to reduce hunger with natural feelings of fullness. Cholecystokinin (CCK) hormone is also released in the small intestine in response to consuming dietary fats and proteins to both suppress appetite and aid in overall digestion. Of the macronutrients (carbohydrates, fats and protein) that you consume each day, protein is most satiating and naturally triggers the release of both CCK and GLP-1.
Synthetic receptor agonists for glucagon-like peptide-1 were originally developed to treat type 2 diabetes by mimicking GLP-1 hormone to boost insulin production, reduce glucagon secretion, and lower blood sugar levels. However, even during clinical trials, researchers discovered the pharmaceutical’s ability to both reduce overall appetite and increase weight loss. These unintended side effects quickly boosted GLP-1 receptor agonists, like Ozempic or Wegovy (semaglutide), to the top of today’s list of revolutionary medical weight loss treatment options and are FDA-approved to treat obesity.
Although clinical studies regarding the potential role of using GLP-1 RAs to manage erectile dysfunction remain limited, reports of success or failure from men taking semaglutide to lose weight do vary. In general, a survey of social media posts discovered that most GLP-1 users reported an increase in sex drive (libido); but that experience wasn’t universal. Some men and women reported a reduction or muted desire to have sex shortly after starting their medical weight loss program. This may be due to the fact that GLP-1s affect the brain’s reward center (dopamine) and may lessen sexual pleasure early on.
Whereas some males using GLP-1 weight loss drugs have reported that they experienced erectile issues while taking the medication, most have noted an opposite effect. However, in a study of non-diabetic users, 1.4% of males reported ED, as compared to 0.14% of men taking a placebo. It should be noted that these results could also be due to semaglutide’s common gastrointestinal side effects, changes in smooth muscle tissue function, or fluctuations in testosterone pathways. For men experiencing new or worsening ED while taking semaglutide, it is recommended they discuss these metabolic changes with their provider.
Can you use ED medications while on semaglutide or tirzepatide?
For starters, tirzepatide and semaglutide are both highly effective GLP-1 receptor agonists, but tirzepatide (Zepbound or Mounjaro) targets two gut hormones including GLP-1 and glucose-dependent insulinotropic polypeptide (GIP) that also increases insulin release. Fortunately, men can safely use ED medications like PDE5 inhibitors while taking semaglutide or tirzepatide, as there are no major drug interactions when using either GLP-1 receptor agonists. However, while there are no known interactions, slower digestion may slow absorption and ED pills make take a bit longer. Because GLP-1 and dual-agonist medications like tirzepatide affect multiple metabolic pathways, it is always recommended to consult a men’s healthcare provider before starting a new medication for erectile dysfunction.
How to Naturally Increase Blood Flow to the Penis
A key biological mechanism behind having healthy erections (when needed) lies in increasing blood flow to the penis. This is best achieved by improving your cardiovascular health, which involves several important lifestyle issues. A structured approach to ensuring better sexual performance should prioritize everyday habits that promote long-term vascular health. Here are some proven strategies for key lifestyle and dietary changes that should be addressed:
- Aerobic Exercise: Routine cardio exercise like running, swimming or cycling several times a week can help strengthen your heart to improve arterial health to increase blood flow to your penis.
- Heart-Healthy Diet: Focus on a protein-forward diet that boost nitric oxide, such as leafy greens, beets, kale, tart berries, and fatty fish. This compound helps to widen blood vessels for improved circulation
- Quit Smoking: Smoking, on the other hand, decreases nitric oxide and damages blood vessel linings, which makes it a major contributor to poor blood circulation throughout the body.
- Limit Alcohol Consumption: Alcohol depresses the central nervous system and disrupts vital hormones in the brain-to-penis pathway. It can suppress testosterone and elevate prolactin that diminishes libido.
- Manage Stress: Chronic stress releases adrenaline and cortisol as a “fight or flight” mechanism that constricts blood vessels and diverts blood away from the penis and toward major muscle group.
For a more detailed, evidence-based overview of natural methods, you can read the Harvard Health guide on nondrug approaches for erectile function. If you are considering prescription solutions or supplements, consult a men’s sexual health provider like Dr. Earl Eye to find the best approach based on your specific sexual health profile. For example, strengthening your pelvic floor muscles can help maintain erections throughout intercourse by trapping blood in the penis.
_______________________
On the clinical front, a majority of recent studies have suggested favorable effects of GLP-1 RAs on erectile function, as well as on reproductive outcomes in both men and women. A plausible explanation for men who have reported improvement in erectile function may involve semaglutide and tirzepatide’s ability for weight-loss, which is one of the most effective ways to improve ED. In fact, as previously mentioned, even a modest loss of 10% of excess body weight can significantly improve hormone levels, erectile function, and overall sexual satisfaction. After all, healthy erections rely on optimal circulation and weight loss helps to clear vascular blockages to boost rigidity. Earl H. Eye, M.D. FACCP, is board certified in five medical specialties including Age Management Medicine and can help you take control of your sexual health. To schedule your appointment for a men’s health exam, call (904) 500-5500.
