I talk about food a lot. And for good reason!
But today I want to get specific about vitamins, minerals, nutrients, and supplements.
What actually has research behind it, what is worth your money, and what to look for when you want to support erection health beyond just eating well.
Before we get into it, go grab this first.
I have a free 20-question scorecard that tells you exactly where your erection health stands right now. It takes ten minutes and gives you a score out of 100, with specific guidance on what to focus on next.
Drop your score in the comments below when you are done.
Right. Let’s get into it.
The Vitamins and Minerals
Vitamin D3
Vitamin D is the most studied vitamin in the context of erectile function.
Men with low vitamin D consistently show higher rates of erectile dysfunction, including in a large US population study published in Atherosclerosis in 2016. Vitamin D is thought to support:
healthy blood vessel function
nitric oxide production
lower inflammation
testosterone production, since the testes have vitamin D receptors
To be clear about what the research shows: low vitamin D is linked to ED, but supplementing hasn’t reliably improved erections in men whose levels were already normal.
Bottom line: Get tested. If you’re low, correct it. If you supplement, choose D3, which raises blood levels more effectively than D2.
Food sources: Salmon, mackerel, sardines, egg yolks, liver. Sunlight remains the most efficient source.
Vitamin B3 (Niacin)
A randomized controlled trial in the Journal of Sexual Medicine (2011) gave 160 men with ED and high cholesterol up to 1,500 mg of niacin daily or a placebo for 12 weeks.
Men with moderate to severe ED improved significantly.
Men with mild ED did not.
The likely mechanism is vascular. Niacin improves blood lipid profiles, which supports the arteries that supply the penis.
Important: The trial dose is a medication dose, not a food amount. Flushing and itching are common at that level, and high-dose niacin can affect the liver. Speak to your doctor first.
Food sources: Chicken breast, turkey, tuna, salmon, beef, peanuts, brown rice.
Vitamin B9 (Folate)
Folate helps keep homocysteine levels in check.
Homocysteine is an amino acid that, when elevated, damages the lining of blood vessels and reduces nitric oxide availability. Elevated homocysteine and lower folate are both associated with erectile dysfunction.
Small trials of folic acid supplementation are encouraging, but they are small.
Bottom line: Early evidence. Focus on getting enough through food.
Food sources: Dark leafy greens, lentils, chickpeas, asparagus, broccoli, avocado.
Vitamin B12
B12 is essential for healthy nerves and red blood cell production, and it works alongside folate to keep homocysteine under control.
Studies have linked low B12 and high homocysteine to erectile dysfunction. Erections depend on healthy nerves as well as healthy blood vessels, so a genuine deficiency is worth correcting.
Deficiency is more common in:
men over fifty
anyone eating a plant-based diet
men taking metformin or long-term acid-reducing medication
Food sources: Meat, fish, shellfish, eggs, dairy. Plant-based eaters almost always need to supplement.
Vitamin C
Vitamin C is an antioxidant that helps protect nitric oxide from being broken down, keeping more of it available for blood vessel function.
Studies show it improves blood vessel dilation, particularly in people with cardiovascular risk factors. It hasn’t been tested directly on erections, but healthy blood vessels are the foundation of healthy erections.
Food sources: Bell peppers, citrus fruit, kiwi, strawberries, broccoli, tomatoes.
Vitamin E
Vitamin E is an antioxidant that helps protect the cells lining your blood vessels.
Get it from food, not supplements. In the large SELECT trial, men taking 400 IU of vitamin E daily had a higher risk of prostate cancer.
Food sources: Almonds, sunflower seeds, hazelnuts, avocado, olive oil, spinach.
Zinc
Zinc is essential for testosterone production.
Deficiency lowers testosterone.
Correcting a deficiency raises it.
If your levels are already normal, extra zinc won’t boost testosterone further.
Too much over time can cause copper deficiency.
Food sources: Oysters are by far the richest source. Also beef, pumpkin seeds, chickpeas, cashews, and dairy.
Magnesium Glycinate
Sleep is one of the most underrated factors in testosterone.
In one study, young healthy men who slept about five hours a night for just one week saw their testosterone drop by 10 to 15 percent.
Magnesium has been shown to improve sleep quality in some studies, and higher magnesium levels are associated with higher testosterone in men.
Why glycinate?
It’s well absorbed.
It’s gentle on the stomach, unlike magnesium oxide.
It’s bound to glycine, an amino acid with calming properties.
Take it in the evening. If you have kidney disease, check with your doctor first.
Food sources: Magnesium itself is found in pumpkin seeds, almonds, cashews, spinach, black beans, and dark chocolate. The glycinate form is only available as a supplement.
The Nutrients
Beyond vitamins and minerals, several other compounds have research behind them for vascular health, hormones, or erectile function.
Omega-3 Fatty Acids
Omega-3 fats (EPA and DHA) lower triglycerides, reduce inflammation, and support healthy blood vessel function.
Most research linking omega-3s directly to erections comes from animal studies. The human evidence is about vascular health in general, which is still where most erection problems begin.
Bottom line: Food is the better route. Fish oil supplement trials have given mixed results, and higher doses are not risk-free.
Food sources: Salmon, sardines, mackerel, anchovies, herring, trout. Walnuts, flaxseed, and chia provide a plant form the body converts only in small amounts.
L-Arginine and L-Citrulline
L-arginine is an amino acid the body uses to make nitric oxide.
A study in BJU International found that 5 g of L-arginine daily improved erectile function, mainly in men whose nitric oxide levels were low to begin with.
L-citrulline may be the better option. The body converts it into arginine, and it raises arginine levels more reliably than taking arginine itself.
A study in Urology found L-citrulline improved erection hardness in men with mild ED.
Food sources: Watermelon is the best natural source of citrulline, especially the white part of the rind. For arginine: turkey, chicken, pumpkin seeds, soybeans, peanuts.
Dietary Nitrates
The body can also make nitric oxide from dietary nitrates, through a pathway separate from arginine.
Beetroot is one of the richest sources. Research consistently shows beetroot juice lowers blood pressure and improves blood vessel function. It hasn’t been tested on erections specifically, but the vascular benefits are well established.
Interesting detail: The bacteria in your mouth help convert nitrates into nitric oxide, and antiseptic mouthwash has been shown to blunt this effect.
Food sources: Beetroot, spinach, arugula, celery, radishes, Swiss chard.
Grape Seed Extract
Grape seed extract contains proanthocyanidins, antioxidants with cardiovascular benefits.
A meta-analysis in the Journal of the American Dietetic Association found it modestly lowered systolic blood pressure.
A later meta-analysis found larger effects, particularly in people with metabolic disorders or obesity.
It hasn’t been tested on erectile function directly, but blood pressure and vascular health matter a great deal here.
Food sources: Red grapes. Supplementation is more practical for meaningful doses.
Tongkat Ali
Tongkat Ali is a Southeast Asian plant with growing research support for male hormonal health.
A randomized trial in Andrologia found a standardized extract raised testosterone in men with late-onset hypogonadism.
A trial in the Journal of the International Society of Sports Nutrition found it lowered cortisol and raised testosterone in moderately stressed adults.
Bottom line: Quality varies widely and long-term safety data are limited. Choose a standardized extract from a reputable brand.
Food sources: Not available through diet. Requires supplementation.
Icariin (Epimedium, commonly known as horny goat weed)
Icariin is the active compound in Epimedium.
In lab studies it weakly inhibits phosphodiesterase type 5, the enzyme targeted by prescription ED medication, and it has improved erectile function in rats. Good human trials are still lacking.
Bottom line: Promising but unproven. Don’t combine it with prescription ED medication or nitrate heart medication.
Food sources: Not a dietary food. Consumed as a supplement or herbal preparation.
Maca Root
Maca is a root vegetable from the Peruvian Andes with centuries of traditional use for male vitality.
A systematic review in BMC Complementary and Alternative Medicine found some positive results for sexual desire and function, but the trials were few and small, so the evidence is limited.
Maca doesn’t appear to work through testosterone, so it may be useful for men with normal hormone levels who are experiencing reduced drive.
Food sources: Maca powder can be added to smoothies, oatmeal, or coffee. It has a malty, slightly earthy flavour.
What to Cut Out
Adding the right nutrients only goes so far if your diet is working against you. These are the biggest ones to reduce:
Sugary drinks and refined sugar. Over time they drive insulin resistance and type 2 diabetes, which are among the strongest risk factors for ED.
Excess alcohol. Heavy drinking is linked to both erectile dysfunction and lower testosterone.
Ultra-processed food. It’s linked to weight gain, high blood pressure, and poorer cardiovascular health, all of which affect erections.
Processed meats. Regular intake is associated with higher cardiovascular risk.
Excess salt. It raises blood pressure, and high blood pressure damages blood vessels over time.
Trans fats. They’re found in some fried and packaged foods, and they damage blood vessels.
Cutting these back is arguably as important as adding anything else in this article.
Don’t Skip the Basics
No supplement outperforms:
regular exercise
losing excess weight
not smoking
good sleep
In men with metabolic syndrome, a Mediterranean-style diet has been shown in clinical trials to improve erectile function.
A Note on Safety
If you take any of the following, speak to your doctor before starting any supplement in this article. Several of them can interact:
nitrate heart medication
prescription ED medication
blood pressure medication
blood thinners
Be cautious with “male enhancement” products in general. The FDA has repeatedly found them secretly contaminated with prescription ED drugs.
A Note on Realistic Expectations
Food and supplementation can genuinely help when the underlying issue is vascular health, nitric oxide availability, or a nutritional deficiency.
What they cannot do is override:
severe vascular disease
significantly low testosterone
neurological issues
medication side effects
If erectile difficulties are persistent, worsening, or appeared suddenly, speak with a doctor.
ED can be an early warning sign of cardiovascular disease. It deserves proper assessment, not just a supplement stack.
Love Emma
Nothing in this article constitutes medical advice. Please consult a qualified healthcare provider before making any changes to your diet, supplementation, or health management.