Short answer: The main magnesium benefits for men are the basics: it supports muscle and nerve function, energy production, blood sugar and blood pressure regulation, and bone health, and most men need 400 to 420 mg a day. Observational research links higher magnesium levels with higher testosterone in older men, and one small trial found supplementation raised testosterone in young men, but there is no good evidence that extra magnesium raises testosterone in men who already get enough. The biggest payoff comes from fixing a shortfall, and NIH data suggest roughly half of Americans fall short from food alone.
Key Takeaways
- Adult men need 400 mg of magnesium a day (ages 19 to 30) or 420 mg a day (31 and older), according to the NIH Office of Dietary Supplements.[1]
- The safe upper limit for magnesium from supplements is 350 mg a day for adults. Food magnesium does not count toward that limit.[1]
- In 399 men aged 65 and older, blood magnesium was strongly and independently associated with testosterone and IGF-1. That is an association, not proof of cause.[2]
- A 2016 meta-analysis of 34 placebo-controlled trials found magnesium supplements modestly lowered blood pressure.[4]
- Pumpkin seeds, chia seeds, almonds, spinach, cashews and black beans are among the richest food sources.[1]
- Men with kidney disease, or who take diuretics, PPIs, certain antibiotics or bisphosphonates, should talk to a doctor before supplementing.[1][5]
What Magnesium Does in a Man’s Body
Magnesium is an essential mineral, which means your body cannot make it and you have to get it from food or supplements. More than 300 chemical reactions in the body rely on it at least in part.[5][6] It is needed to make protein, keep nerves firing normally, let muscles contract and relax, and hold blood sugar and blood pressure in a normal range. It also helps regulate calcium and is part of bone.[5]
Cleveland Clinic dietitian Kate Patton describes magnesium as a “team player” rather than a single-purpose nutrient.[6] Its benefits show up most clearly when you were not getting enough to begin with.
How common is a shortfall?
More common than most men think. National survey data from 2013 to 2016 found that 48% of Americans of all ages get less magnesium from food and beverages than the estimated average requirement, and men aged 71 and older are among the groups most likely to fall short.[1] In an earlier NHANES analysis (2003 to 2006), men who used supplements averaged 350 mg a day from food alone, while men who did not use supplements averaged only 268 mg, well under the 420 mg target.[1]
Magnesium Benefits for Men: What the Evidence Shows
Here is what the research supports, by strength of evidence.
1. Testosterone: an association, plus one small trial
This is the benefit most men search for (“does magnesium increase testosterone?”). Two studies come up repeatedly:
- Observational study in older men. In the Italian InCHIANTI cohort, researchers measured blood magnesium in 399 men aged 65 or older (average age about 74). After adjusting for age, body mass index, inflammation markers, SHBG, insulin and grip strength, higher magnesium was still significantly associated with higher total testosterone and higher IGF-1. The authors concluded that magnesium levels are “strongly and independently associated” with these anabolic hormones.[2] This design cannot show that magnesium causes higher testosterone. Men with better magnesium status may simply be healthier overall.
- Small supplementation trial in young men. A 2011 study in Biological Trace Element Research gave 10 mg of magnesium per kilogram of body weight for 4 weeks to sedentary men and to tae kwon do athletes. Free and total testosterone rose in both supplemented groups, with bigger increases in the men who exercised.[3] The study was small, short, and the dose was high: for an 80 kg (176 lb) man, 10 mg/kg works out to 800 mg a day, more than twice the 350 mg supplemental upper limit the NIH sets for adults.[1]
Bottom line: correcting low magnesium is a reasonable part of supporting healthy hormone levels, alongside sleep, training, body weight and other nutrients like zinc. Megadosing magnesium when your intake is already adequate has no good evidence behind it. If you suspect low testosterone, read our guide to the signs of low testosterone and get a blood test from your doctor rather than guessing.
2. Blood pressure and heart health
This is where human trial data are strongest. A meta-analysis published in Hypertension in 2016 pooled 34 randomized, double-blind, placebo-controlled trials with 2,028 participants aged 18 to 84. At a median dose of 368 mg a day for a median of three months, magnesium produced overall reductions in both systolic and diastolic blood pressure.[4] Across 27 of those trials, 200 mg a day or one month of use was enough to significantly raise blood magnesium. The authors noted that most trials were small and had relatively high dropout rates.[4] Harvard Health also points out that the FDA allows a qualified health claim linking magnesium to reduced risk of high blood pressure, while describing study results as inconsistent.[5]
Magnesium is not a substitute for blood pressure medication. If you have high blood pressure, work with your doctor.
3. Muscles, cramps and training
Magnesium’s role in muscle contraction and relaxation is well established.[6] Deficiency can show up as muscle cramps, twitching and weakness.[1] Evidence that extra magnesium reduces post-exercise soreness or improves performance in men who already get enough is limited.[5] Epsom salt (magnesium sulfate) baths for sore muscles are popular, but Cleveland Clinic notes they are not necessarily supported by research.[6]
4. Sleep and stress
Harvard Health rates the evidence for magnesium and insomnia as limited, but says a supplement may be worth trying after talking with a doctor.[5] Cleveland Clinic notes some researchers have found magnesium may help level out cortisol, the stress hormone.[6] If sleep is your main goal, magnesium glycinate is the form most often used, and we cover it in detail in our guide to magnesium glycinate benefits for men.
Signs of Magnesium Deficiency in Men
True deficiency is uncommon in healthy people because the kidneys limit how much magnesium you lose. Low intake over a long period, certain medications, alcohol use and digestive diseases can tip the balance.[1]
- Early signs: loss of appetite, nausea, vomiting, fatigue and weakness.[1]
- As it worsens: numbness, tingling, muscle contractions and cramps, personality changes, abnormal heart rhythms and, in severe cases, seizures.[1]
- Who is most at risk: men with Crohn’s disease, celiac disease or prior bowel surgery, men with type 2 diabetes, men with alcohol dependence, and older adults.[1]
A normal blood magnesium level is about 1.7 to 2.2 mg/dL.[5] Keep in mind that blood levels are an imperfect marker, because only a tiny fraction of the body’s magnesium sits in the blood.[4] Symptoms like fatigue and cramps have many causes, so do not self-diagnose; ask your doctor.
How Much Magnesium Do Men Need?
Food first. Most men can hit their target by eating more seeds, nuts, beans, leafy greens and whole grains. For example, one serving of spinach, an ounce of almonds and a banana together provide about 190 mg.[5]
| Food (serving) | Magnesium (mg) | % Daily Value |
|---|---|---|
| Pumpkin seeds, roasted (1 oz) | 156 | 37% |
| Chia seeds (1 oz) | 111 | 26% |
| Almonds, dry roasted (1 oz) | 80 | 19% |
| Spinach, boiled (1/2 cup) | 78 | 19% |
| Cashews, dry roasted (1 oz) | 74 | 18% |
| Peanuts, oil roasted (1/4 cup) | 63 | 15% |
| Soymilk (1 cup) | 61 | 15% |
| Black beans, cooked (1/2 cup) | 60 | 14% |
| Edamame, cooked (1/2 cup) | 50 | 12% |
Source: NIH Office of Dietary Supplements.[1]
Daily targets and limits for men
| Age | Recommended intake (food + supplements) | Upper limit from supplements only |
|---|---|---|
| 19 to 30 | 400 mg | 350 mg |
| 31 to 50 | 420 mg | 350 mg |
| 51 and older | 420 mg | 350 mg |
Source: NIH Office of Dietary Supplements.[1]
Supplement labels list elemental magnesium, not the weight of the whole compound, so compare products by the elemental number.[1]
Best Magnesium for Men: Choosing a Form
There is no single “best magnesium for men.” The right form depends on why you are taking it. Small studies show that magnesium aspartate, citrate, lactate and chloride are absorbed more completely than magnesium oxide and sulfate.[1]
| Form | Common use | Notes |
|---|---|---|
| Glycinate | Sleep and relaxation | Commonly promoted for sleep and reduced anxiety[5] |
| Citrate | General use, constipation | Well absorbed; also a strong laxative[1][6] |
| Oxide | Indigestion, constipation | Less well absorbed; often linked to diarrhea[1][5] |
| Chloride | General use | Well absorbed; can cause diarrhea[1] |
| Sulfate (Epsom salt) | Bath soaks | Less well absorbed by mouth[1][6] |
Practical tips: take magnesium with food if it upsets your stomach, split larger doses, and do not stack several magnesium-containing products (multivitamins, antacids, laxatives) without adding up the total. Very high zinc intakes, around 142 mg a day in one study, can interfere with magnesium absorption.[1] Choosing a product verified by an independent lab also helps; see our guide to third-party tested supplements.
Side Effects, Interactions and Who Should Be Careful
Side effects
Magnesium from food is not a concern for healthy kidneys. Supplements are a different story. High supplemental doses commonly cause diarrhea, nausea and abdominal cramping, most often with the carbonate, chloride, gluconate and oxide forms.[1] Serious toxicity (low blood pressure, vomiting, trouble breathing, irregular heartbeat and even cardiac arrest) is linked to very large doses, usually more than 5,000 mg a day from laxatives or antacids.[1]
Drug interactions
- Bisphosphonates (such as alendronate): magnesium reduces their absorption; separate doses by at least 2 hours.[1]
- Tetracycline and quinolone antibiotics (such as doxycycline and ciprofloxacin): take the antibiotic at least 2 hours before or 4 to 6 hours after magnesium.[1]
- Diuretics: loop and thiazide diuretics increase magnesium loss, while potassium-sparing diuretics (amiloride, spironolactone) reduce it.[1]
- Proton pump inhibitors: long-term use, usually more than a year, can cause low magnesium.[1]
Talk to a doctor first if you
- Have kidney disease. Kidney failure is the most common cause of magnesium buildup, and levels need monitoring.[5]
- Take any of the medications above, or heart rhythm medication.
- Have a digestive disease, diabetes or a history of heavy drinking.
Where Ultra Bann Fits In
To be clear: Ultra Bann does not contain magnesium. Ultra Bann is a natural male vitality supplement from DL Bioproducts made with seven botanicals per serving, with every amount on the label and no proprietary blend: Thai Butea superba 345 mg, Panax ginseng 110 mg, Cynomorium songaricum 85 mg, black ginger (Kaempferia parviflora) 85 mg, tongkat ali 85 mg, epimedium (horny goat weed) 45 mg and reishi 45 mg, for 800 mg total. You take one capsule every 2 days. You can review the full label on our ingredients page.
Magnesium is a nutrition basic; Ultra Bann is a separate choice for men interested in traditional herbs. For the bigger picture, see our guide on how to support testosterone naturally. If you want to try Ultra Bann, your first order ships free in the US and comes with a 60-day money-back guarantee: shop Ultra Bann.
Frequently Asked Questions
Does magnesium increase testosterone in men?
Possibly, if you are low. In older men, higher blood magnesium is linked to higher testosterone,[2] and one small 4-week trial in young men found supplementation raised free and total testosterone.[3] There is no good evidence that extra magnesium raises testosterone in men who already get enough.
How much magnesium should a man take daily?
Men need 400 mg a day at ages 19 to 30 and 420 mg a day from age 31, counting food and supplements together. Supplements alone should stay at or below 350 mg a day unless a doctor advises otherwise.[1]
What is the best form of magnesium for men?
It depends on the goal. Glycinate is the form most often used for sleep, citrate is well absorbed but has a laxative effect, and oxide is less well absorbed.[1][5] For general use, a well-absorbed form at a modest dose is a sensible starting point.
Is it OK to take magnesium every day?
For most healthy men, yes, at or below the 350 mg supplemental upper limit. Diarrhea is the most common side effect. Men with kidney disease or on interacting medications should check with a doctor first.[1][5]
What are the signs of low magnesium in men?
Early signs include loss of appetite, nausea, fatigue and weakness. Later signs include numbness, tingling, muscle cramps and abnormal heart rhythm.[1] These symptoms have many causes, so see a doctor for testing.
References
- NIH Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals. ods.od.nih.gov
- Maggio M, Ceda GP, Lauretani F, et al. Magnesium and anabolic hormones in older men. International Journal of Andrology. 2011;34:594 to 600. University of Parma repository
- Cinar V, Polat Y, Baltaci AK, Mogulkoc R. Effects of magnesium supplementation on testosterone levels of athletes and sedentary subjects at rest and after exhaustion. Biological Trace Element Research. 2011;140(1):18 to 23. Erciyes University record
- Zhang X, Li Y, Del Gobbo LC, et al. Effects of magnesium supplementation on blood pressure: a meta-analysis of randomized double-blind placebo-controlled trials. Hypertension. 2016. Summary: NutraIngredients
- Shmerling RH. What can magnesium do for you and how much do you need? Harvard Health Publishing. June 2025. health.harvard.edu
- Cleveland Clinic. Magnesium: Benefits and How Much You Need. health.clevelandclinic.org
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. This article is for information only and is not medical advice.
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