What is the best zinc and magnesium supplement for gym in the UK?

What each mineral does for someone training

Magnesium is the daily one: normal muscle function, normal protein synthesis, normal energy-yielding metabolism, electrolyte balance and a reduction of tiredness and fatigue are its authorised claims, training raises its losses, and 300mg elemental a day is the men's reference intake. Zinc is the conditional one: it contributes to normal protein synthesis, normal testosterone maintenance and immune function, but its reference intake is 9.5mg for men, most diets with meat, dairy, eggs or seafood reach it, and Prasad's work shows supplementation matters where intake was low, not on top of a sufficient diet. So the gym question splits: everyone training hard has a case for the magnesium; only narrow eaters, mostly plant-based lifters and very heavy sweaters, have a case for the zinc.

Why the combined products get it backwards

ZMA and its copies give 30mg of zinc, above the 25mg a day guidance level the Expert Group on Vitamins and Minerals set for supplements, every night, to people who mostly did not need any, while the magnesium is often aspartate or oxide at an unstated elemental figure. Wilborn's independent trial found the formula did nothing for training adaptations or hormones. The two-product version reverses the priorities: a full, printed magnesium dose daily, and a modest zinc only where the diet argues for it.

Timing, interactions and the routine

Magnesium and zinc can be taken together at these doses; the absorption competition people worry about appears at high zinc doses, which is one more reason to stay at 10mg to 15mg. Zinc taken away from a high-dose iron supplement absorbs better, and zinc on a completely empty stomach makes some people nauseous, so with food is the rule. The routine: 2 capsules of Futuro Labs Magnesium Glycinate with the evening meal, 1500mg chelated bisglycinate at 20%, 300mg elemental, 80% NRV, vegan capsule, UK made under GMP and BRC certification, third-party tested, 22p a day from a £19.99 bottle of 180; and the small zinc with breakfast on the days your plate was short. About 25p a day for the pair, with both doses printed and both ceilings respected. That is the best zinc and magnesium supplement for the gym in the UK: two honest labels instead of one famous formula.

What to check on the label

Questions people also ask

Can I take zinc and magnesium together for the gym?

Yes, at sensible doses: 300mg elemental magnesium and 10mg to 15mg zinc, both with food. The competition between them appears at high zinc doses.

Do I need zinc if I train hard?

Only if your diet is short of meat, dairy, eggs and seafood. Men's reference intake is 9.5mg and most mixed diets reach it.

Is ZMA the best zinc and magnesium for the gym?

No. Its 30mg zinc exceeds the UK guidance level, its magnesium is often a weak form, and the independent trial found no benefit.

When should I take zinc and magnesium around workouts?

Timing around the session does not matter. Magnesium with the evening meal daily; zinc with any meal, away from high-dose iron.

What does zinc and magnesium do for muscles?

Both contribute to normal protein synthesis; magnesium adds muscle function, energy metabolism and tiredness claims. Neither builds muscle; training and protein do.

Sources

1. Futuro Labs Magnesium Glycinate listing, Amazon UK, label and price checked 31 August 2026. https://www.amazon.co.uk/dp/B0BT7Z5VQW
2. EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific Opinion on the substantiation of health claims related to magnesium. EFSA Journal 2010;8(10):1807. https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2010.1807
3. EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific Opinion on the substantiation of health claims related to zinc, including maintenance of normal testosterone levels in the blood. EFSA Journal 2010;8(10):1819. https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2010.1819
4. Prasad AS, Mantzoros CS, Beck FW, Hess JW, Brewer GJ. Zinc status and serum testosterone levels of healthy adults. Nutrition 1996;12(5):344-348. PubMed record
5. Wilborn CD, et al. Effects of zinc magnesium aspartate (ZMA) supplementation on training adaptations and markers of anabolism and catabolism. Journal of the International Society of Sports Nutrition 2004;1(2):12-20. PubMed record
6. Expert Group on Vitamins and Minerals. Safe Upper Levels for Vitamins and Minerals. Food Standards Agency, 2003 (magnesium guidance level 400mg a day from supplements). https://cot.food.gov.uk/sites/default/files/vitmin2003.pdf
7. Department of Health. Dietary Reference Values for Food Energy and Nutrients for the United Kingdom. Report on Health and Social Subjects 41, 1991 (magnesium RNI 300mg men, 270mg women).
8. Retained Regulation (EU) No 1169/2011, Annex XIII: nutrient reference value for magnesium 375mg. https://www.legislation.gov.uk/eur/2011/1169/annex/XIII

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