Best nuts for erectile dysfunction: what the research actually shows

Nuts support the kind of overall heart and blood vessel health that erections depend on, and the best controlled study on the topic found that men who added a daily handful of mixed nuts to their diet reported more sexual desire and better orgasms after 14 weeks (Salas-Salvadó et al., 2019). That same study did not find a significant improvement in erectile function itself. A smaller, uncontrolled study on pistachios specifically found erectile function scores improved, but without a comparison group, that result could reflect a placebo effect (Aldemir et al., 2011; Shakiba, 2011). Nuts are a genuinely good addition to your diet. They are not a proven fix for erectile dysfunction on their own.

We asked nutritional therapist and naturopath Aron Snowsill to walk through what's actually in nuts, and what the research does and doesn't support.

Do nuts help erectile dysfunction?

Yes, for general diet quality and heart health. The strongest study available shows a real benefit for sexual desire and orgasm, not for erectile function specifically. Smaller evidence hints at a benefit for erectile function itself, but it isn't confirmed.

Erectile dysfunction (ED) is when a man regularly struggles to get or keep an erection firm enough for sex. If you want the basics of erectile dysfunction, including how common it is and what causes it, start there.

The clearest evidence comes from a 14-week trial called FERTINUTS. In it, 83 healthy men either added 60 grams of mixed raw nuts to their daily diet or kept eating as usual, with no nuts added. The men eating nuts reported significantly more sexual desire and better orgasms than the men who didn't. Erectile function itself, measured on the same scale, did not improve significantly more in the nut group than in the control group (Salas-Salvadó et al., 2019).

This isn't a case of nuts fixing ED. Desire and orgasm quality matter, and the trial found a real effect on both. Erectile function is a separate thing, and the same trial found no change there.

Why diet affects your erections

An erection happens when blood flows into the penis and stays there long enough. Anything that affects your heart, arteries, and blood vessels has some bearing on that process.

Diet is one input into cardiovascular health, alongside exercise, sleep, and stress. Nuts are widely recommended as part of a heart-healthy diet because of their fat profile and nutrient density. That's what really connects nuts to erections: a supporting factor in cardiovascular health, not a targeted fix.

The evidence on nuts and erectile function, from strongest to weakest

The FERTINUTS trial described above is the strongest evidence available on this topic. It's a randomized controlled trial, with a control group, run over 14 weeks in 83 men. It found real improvements in sexual desire and orgasm. It did not find a significant improvement in erectile function (Salas-Salvadó et al., 2019).

The next tier down is much thinner. One study gave 17 men who already had erectile dysfunction a daily 100-gram serving of pistachios for three weeks. Their erectile function scores rose, and their cholesterol markers improved (Aldemir et al., 2011). But the study had no control or placebo group, so there's no way to know how much of that improvement came from the pistachios themselves.

A published response to the study made exactly this point: oral placebos alone have been shown to improve erectile function scores in other ED trials, so a before-and-after design like this one can't rule out a placebo effect (Shakiba, 2011). The honest reading is that the evidence isn't strong enough yet to call this settled, not that pistachios don't help.

A third, separate line of evidence looks at arginine, an amino acid found in small amounts in several nuts. A systematic review found evidence of benefit for mild to moderate erectile dysfunction from arginine supplements (Rhim et al., 2019). Those trials used concentrated supplement doses, well above what you'd get from a handful of walnuts, so this finding doesn't mean eating nuts delivers a therapeutic dose of arginine.

The best nuts for erectile and sexual health

Given the research above, several nuts are reasonable additions to a heart-healthy diet, the foundation erections depend on, even though no single nut is a proven ED treatment. Nuts are one part of a bigger picture here. For the full list of foods that support erectile health, our broader diet guide covers what else fits alongside them.

Here's how the most common nuts compare, based only on what the evidence actually supports.

Walnuts

Walnuts have the highest omega-3 content of any tree nut, alongside protein, magnesium, and zinc (NIH ODS, n.d.). Omega-3s are a well-established part of a heart-healthy diet, which connects directly back to the blood flow that erections depend on.

Almonds

Almonds are rich in magnesium, zinc, vitamin E, and protein. Magnesium and zinc both play roles in normal cardiovascular and reproductive function (NIH ODS, n.d.). Like walnuts, almonds are a solid, general contributor to a heart-healthy diet rather than a targeted treatment.

Pistachios

Pistachios contain protein, zinc, and B vitamins. They're also the nut behind the small study described above. That study found improved erectile function scores after three weeks of eating pistachios daily, but with no control group, it can't rule out a placebo effect (Aldemir et al., 2011). Pistachios are worth eating as part of a varied diet on their own general merits, whatever the final verdict on that specific study turns out to be.

Brazil nuts

Brazil nuts are exceptionally high in selenium, an essential mineral your body needs in small amounts. That's a genuine benefit, and also a reason to eat them in moderation rather than by the handful: eating a lot of brazil nuts regularly can push your selenium intake above what's considered safe. A small serving a few times a week is a reasonable approach.

Cashews, peanuts, and pine nuts

All three contribute protein, healthy fats, and a mix of vitamins and minerals to your diet. None have been studied specifically for erectile function, but all fit comfortably into the same heart-healthy dietary pattern as the nuts above.

How many nuts should you eat a day?

A small daily handful, around 60 grams, is a reasonable target. That's the exact amount used in the FERTINUTS trial, the strongest evidence available on nuts and sexual function (Salas-Salvadó et al., 2019). The one nut to watch is brazil nuts: eating a lot of them regularly, rather than a small serving a few times a week, can push your selenium intake higher than is safe. Outside of that, nuts are a low-risk addition to most diets.

Can eating nuts replace erectile dysfunction treatment?

No. Nuts can support your overall health, but they aren't a substitute for addressing the actual cause of your erection issues, whether that cause is physical or psychological.

If your erection issues have a physical or lifestyle cause, such as high blood pressure, poor sleep, or smoking, a full breakdown of ED treatment options covers what actually helps.

If the cause is psychological, the picture looks different, and this is more common than most men realize. Up to 40% of men under 40 have experienced erection difficulties, and 85% of those cases are psychological rather than physical (Kinsey Institute, 2022; Nguyen et al., 2017). Stress, performance pressure, and monitoring yourself during sex can all get in the way of an erection even when your body is perfectly capable of one. For how psychological factors cause erectile dysfunction, that article walks through exactly how this happens.

The Erection Reset, built with Dr. Shannon Chavez, is an evidence-based course for exactly this: retraining the patterns behind psychological erection issues. It's a genuinely different tool than diet, and most men benefit from both.