Supplements for men: what's useful, what isn't

Last reviewed: 7 May 2026

Most health content aimed at men is either macho nonsense about "testosterone boosters" or generic supplement lists that could apply to anyone. Neither is particularly useful. Men do have a few specific nutritional and physiological needs that deserve honest treatment, and the short list of supplements that genuinely help is different from the long list of supplements that get marketed.

The pattern behind men's health data

Men in the UK (and most of Europe) consistently under-perform on a handful of health indicators:

Later help-seeking — men are statistically slower to see a GP, get bloods done, or address persistent symptoms.
Lower preventive care uptake — fewer regular check-ups, less screening engagement.
Higher rates of risky lifestyle factors — alcohol, smoking, sedentary work patterns.
Under-nutrition in specific micronutrients — zinc, magnesium, omega-3 tend to be lower in male-pattern diets than in recommended ranges.
Under-attention to sleep and stress — often normalised as "part of the job."

The first intervention isn't a supplement. It's an annual blood panel from your GP. That single step catches more missable conditions than any supplement protocol.

The supplements with genuine male-relevance

Omega-3 EPA and DHA. Cardiovascular disease remains the largest single cause of premature death in men. Omega-3 EPA and DHA contribute to the normal function of the heart at 250 mg daily (authorised claim)^[1]. Higher doses are of active research interest for cardiovascular and metabolic outcomes. Men who don't eat oily fish twice a week are almost certainly under-dosing — NHS guidance is at least one portion of oily fish a week^[2]. Our Omega-3 fish oil clears the threshold with room to spare.

Vitamin D. Deficiency runs high in UK men (especially indoor-working and dark-skinned). Vitamin D contributes to the normal function of the immune system, maintenance of normal bones, normal muscle function, maintenance of normal teeth and normal absorption of calcium and phosphorus (authorised claims). SACN's 2016 review recommends a 10 µg daily reference intake for everyone over four^[3]. Our D3+K2 covers this year-round with the added K2 MK-7 for calcium handling.

Zinc. Contributes to normal fertility and reproduction, maintenance of normal testosterone levels in the blood, normal immune function, protection of cells from oxidative stress, maintenance of normal hair, skin and nails, and several others (multiple authorised claims)^[1]. Men lose zinc via semen; male requirements are specifically elevated versus female requirements. Food first (shellfish, meat, pumpkin seeds, legumes); a sensible multivitamin or targeted zinc where diet is low.

Magnesium. Contributes to normal muscle function, reduction of tiredness and fatigue, electrolyte balance, normal energy-yielding metabolism and normal psychological function (authorised claims). Magnesium is involved in over 600 enzymatic reactions, which is why deficits show up across so many systems^[4]. Men who train hard, drink regularly, or eat diets low in nuts, seeds and leafy greens often sit short. Our MagActive delivers 300 mg across four organic forms.

B-Complex. The full set of B-vitamins support energy metabolism, nervous system function and psychological function. Men with high stress loads, heavy training schedules, or inconsistent diets benefit. Our B-Complex covers all 8 B-vitamins in active forms.

Ashwagandha. The strongest adaptogen research base sits here, including some male-specific research on cortisol, perceived stress, self-reported sleep and fitness markers. An 8-week RCT reported significant reductions in perceived stress alongside improvements in DHEA-S and testosterone in stressed adult men^[5]. Our Ashwagandha KSM-66 uses the standardised extract referenced in most of that research. Not a testosterone-boosting claim — research in that space is more nuanced than marketing suggests — but a solid option for the stress-physiology side of male health.

Selenium. Contributes to normal spermatogenesis, normal thyroid function, protection of cells from oxidative stress and normal immune function (authorised claims). UK soil is selenium-low; two Brazil nuts daily covers it.

What about "testosterone boosters"?

Testosterone supplement marketing is one of the most aggressive categories in the industry and one of the least evidence-backed. The honest picture:

True low testosterone is a medical condition (hypogonadism) that needs a GP, not a supplement. Symptoms include persistent fatigue, low libido, erectile dysfunction, mood change, loss of muscle mass. A blood test confirms it; treatment is medical (testosterone replacement therapy).
Age-related testosterone decline is real and gradual but modest — and heavily influenced by body composition, sleep, alcohol, stress, and resistance training. Fix those first.
"Testosterone-boosting" ingredients (tribulus, fenugreek, D-aspartic acid, horny goat weed, maca, tongkat ali) have mixed and generally small clinical effects. None have authorised EU claims at supplement level. Some show small effects in testosterone-low men; most show nothing measurable in healthy men.
Zinc and vitamin D are the two authorised-claim nutrients with actual "maintenance of normal testosterone levels" (zinc) and general hormonal support involvement. If you're under-dosing either, correct that first.

The honest stack for men worried about testosterone: strength-train regularly, sleep seven-plus hours, manage alcohol, keep body fat in a reasonable range, address zinc and vitamin D. Check with your GP if symptoms are real.

What about prostate health?

Prostate enlargement (BPH) and prostate cancer are the two main prostate concerns that increase with age. Both deserve medical rather than supplemental primary management. Saw palmetto has traditional use in BPH symptoms; evidence is mixed and no authorised EU claim exists. Lycopene (from tomatoes) and selenium have been studied in prostate-cancer-prevention contexts with mixed results. The honest framing: annual check-ins with your GP after 50, a Mediterranean-style diet, and sensible tomato/olive oil/nuts intake cover the practical side. Supplements are not the primary tool.

What about fertility?

Male fertility supplement research is one of the more active nutritional areas. The ingredients with genuine evidence:

Zinc — authorised claim for normal fertility and reproduction.
Selenium — authorised claim for normal spermatogenesis.
Folate — contributes to normal amino acid synthesis, relevant to sperm quality.
Vitamin C and E — protection of cells from oxidative stress; sperm are particularly sensitive to oxidative damage.
L-carnitine and CoQ10 — active research files, no authorised claims.
Omega-3 EPA and DHA — research activity in sperm membrane lipid quality.

Men planning a pregnancy with a partner benefit from correcting the authorised-claim nutrients above and avoiding the main fertility-antagonists: excess alcohol, smoking, heat exposure (hot tubs, sauna use daily), and untreated obesity. If trying for six-plus months without success, see your GP — fertility investigations are a couple's matter, not a solo supplement project.

The realistic male supplement stack

For most adult men with reasonable but imperfect diets:

Omega-3 (fish oil or algae oil) daily — cardiovascular and cognitive baseline.
Vitamin D3+K2 year-round.
B-Complex if diet is inconsistent or stress is high.
Magnesium in the evening — sleep, muscles, stress.
Ashwagandha if the stress-physiology side is the issue.
Zinc if diet is low in seafood, meat and legumes.
An annual blood panel from your GP.

Skip: "testosterone boosters," generic multi-everything products, anything with "manly" in the product name.

In practice

Men's supplement needs overlap mostly with everyone's supplement needs — omega-3, vitamin D, B-complex, magnesium — with a few male-relevant additions around zinc, selenium and stress-physiology (ashwagandha). The most valuable single intervention is an annual blood panel. The testosterone-booster aisle is mostly marketing. Strength training, sleep, sensible alcohol, Mediterranean-pattern eating and the six-supplement stack above do more for male health than any dedicated "men's formula" — and cost much less.

References

European Commission. EU Register of Nutrition and Health Claims Made on Foods. ec.europa.eu
NHS. Fish and shellfish nutrition. nhs.uk
Scientific Advisory Committee on Nutrition. Vitamin D and Health (2016). gov.uk
de Baaij JHF, Hoenderop JGJ, Bindels RJM. Magnesium in man: implications for health and disease. Physiol Rev. 2015;95(1):1–46. PubMed: 25540137
Lopresti AL, Smith SJ, Malvi H, Kodgule R. An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: A randomized, double-blind, placebo-controlled study. Medicine (Baltimore). 2019;98(37):e17186. PubMed: 31517876