Top 4 Supplements for Better Men’s Health (backed by science)

Medical review: Dr Rui Graça, MD, Urologist & Founder | 30 June 2025

Top 4 Supplements for Better Men’s Health (backed by science)

The Supplement Trap (and the Way Out)

Walk into any supplement store and you’re bombarded with promises: more muscle, more energy, more libido, more... whatever.

But here’s the uncomfortable truth: many men are spending money monthly on things they don’t need, and often overlooking what they do!

At MHI, we take a slightly different view; supplements shouldn’t be a shortcut or a silver bullet. However, when used wisely, they can support key men’s health systems:

·      hormonal health

·      metabolic function

·      mental clarity

·      longevity

Here are four evidence-backed supplements that can make a real difference, especially if your diet, stress, sleep, or environment aren't perfect (and let’s be honest: whose are?).

#1: Vitamin D3 – The Silent Power Player

If there’s one supplement nearly every man should consider, it’s this one.

Vitamin D is actually a hormone precursor, not just a vitamin. It’s essential for testosterone production, immune modulation, bone strength, and mood regulation.

·       Low levels are linked with low T, low mood, and even increased risk of cardiovascular disease.

·       Studies show men with adequate vitamin D have significantly higher free testosterone levels.

Most men in Europe (and beyond) still fall short, especially if they work indoors or apply sunscreen consistently (as they should).

Tip: Get your 25(OH)D levels tested. Most men feel best with levels between 40-60 ng/mL. Doses of 2000-5000 IU/day are typical, but testing is key.

#2: Magnesium - The Unsung Workhorse

Magnesium is involved in over 300 enzymatic reactions in the body, including those involved in:

·       Testosterone synthesis

·       Blood sugar control

·       Sleep quality

·       Stress modulation

It also helps prevent excess aromatisation (testosterone being converted into oestrogen), particularly in the liver.

Yet up to 50% of men may be deficient due to soil depletion and poor dietary intake.

Tip: Magnesium glycinate or citrate are well-absorbed forms. 300-400 mg/day is a good target for most men.

#3: Omega-3 Fatty Acids - Not Just for the Heart

Omega-3s (EPA/DHA) support cardiovascular health, brain function, joint health, and yes… testosterone too.

·       They reduce inflammation and improve testicular function

·       May help lower oestradiol and support leaner body composition

But most men aren’t getting the recommended 1g/day of EPA+DHA unless they eat oily fish 3-4 times a week.

Tip: Look for high-quality fish oil (or krill oil) supplements. Aim for 1000 mg combined EPA/DHA daily.

#4: Zinc - The Testosterone Guardian

Zinc is crucial for testosterone production and sperm health. It also plays a role in immune function and metabolism.

·       Zinc deficiency is common in men with low testosterone

·       Supplementing zinc has been shown to improve T levels in deficient men

However, more isn't always better. Excess zinc can deplete copper and disrupt the balance.

Tip: 25-50 mg/day is often sufficient. If supplementing long-term, consider pairing with copper (e.g., 2 mg) or monitoring with blood tests.

What About the Rest?

Sure, there are other contenders: - creatine, - B-complex vitamins, - ashwagandha, - probiotics... and so on And some may have a place, but without the foundation above, you're skipping steps.

It’s also vital to remember: long-term, ongoing supplementation without any testing is guessing. And guessing wrong, especially with hormones, can backfire.

Your Next Step: From Guessing to Clarity

Not all men need supplements. But if your energy, hormones, or performance feel off, blind guessing won’t cut it.

Book your Initial Assessment

Disclaimer: This article is for educational purposes only and does not constitute medical advice. Consult a licensed physician for personalised care. Clinical details are composite and privacy-protected. Story reviewed by Dr Rui Graça, MD.