Last Updated: Friday 14th August 2026

ZMA stands for zinc magnesium aspartate. The original formula combined zinc monomethionine aspartate with magnesium aspartate and vitamin B6, and the acronym refers to the aspartate salt the two minerals were bound to rather than to a third separate nutrient.

Zinc and magnesium are two of the minerals most commonly supplemented by active people, and both are lost through sweat. Magnesium supports normal muscle contraction and relaxation, nerve function, and energy metabolism. Zinc supports immune system function, protein synthesis, and healthy reproductive hormone function. Vitamin B6 supports energy metabolism and the nervous system, and works alongside the two minerals in the formula.

Why Take a ZMA Supplement

• Two minerals in one – Covers zinc and magnesium together rather than taking two separate products.
• Made for active people – Requirements for both minerals increase with training volume, since both are lost through sweat.
• Taken before bed – ZMA is conventionally taken in the evening, which fits alongside a wind-down routine.
• Immune and hormone support – Zinc supports immune system function and healthy reproductive hormones when dietary intake is inadequate.
• Simple to dose – Almost always sold in capsules or tablets, so there is nothing to mix.

What to Look For on the Label

Despite the name, not every ZMA formula uses aspartate. Brands use a range of magnesium and zinc salts, and the form affects how well each mineral is absorbed. Magnesium may appear as aspartate, citrate, oxide, or amino acid chelate, and zinc as aspartate, monomethionine, gluconate, oxide, or amino acid chelate. Some products also add selenium, manganese, taurine, or vitamins C and E.

Two things worth checking. First, the elemental figures for zinc and magnesium rather than the compound weights, since those are what you are actually getting. Second, the number of capsules per serve, because ZMA doses are commonly split across two to four capsules and per-capsule figures can look lower than they are.

ZMA or a Standalone Magnesium Supplement

A ZMA formula makes sense if you want zinc and magnesium together in one product and are taking it primarily around training and recovery. If magnesium is your main reason for supplementing, a dedicated magnesium product will generally give you a higher dose in a better-absorbed form. Our Magnesium Glycinate range is the gentlest option on digestion, and the full Magnesium Supplements range covers every form and format we stock.

How and When to Take ZMA

ZMA is usually taken 30 to 60 minutes before bed, often on an empty stomach. Calcium can interfere with zinc absorption, so it is generally suggested you avoid taking ZMA at the same time as a dairy-based shake or a calcium supplement. Serving sizes differ between products and some brands list separate doses for men and women, so follow the directions on your label rather than assuming a standard dose.

A Note on the Evidence

ZMA has a long history in sports nutrition and is often promoted for its effect on hormone levels and strength. It is worth being straight about this: while zinc and magnesium each have well-established roles in muscle function, immunity, and energy metabolism, peer-reviewed research on ZMA as a combination formula has produced mixed results, particularly around testosterone. Where it makes the clearest sense is topping up two minerals that active people commonly fall short on.

Popular ZMA Supplements

• ZMA+ by Musashi
• ZMA Pro by Genetix Nutrition
• Z-Mag by ATP Science
• Zinc Magnesium Vitamin B6 by BSc Supplements
• Z Force by Dymatize

The Science of Zinc and Magnesium

Peer-reviewed evidence supports the roles of magnesium and zinc in energy metabolism, muscle function, and exercise contexts.

• Exercise and performance – review of magnesium status, supplementation and exercise performance, Nutrients, 2017.
• Supplementation protocols – randomised trial comparing acute versus chronic magnesium supplementation in resistance exercise, Journal of the International Society of Sports Nutrition, 2015.
• Absorption and bioavailability – review of intestinal absorption and the factors influencing magnesium bioavailability, which concluded that dose and individual magnesium status matter more than the specific form used, Current Nutrition and Food Science, 2017.
• Australian reference values – government summary of recommended dietary intakes for magnesium by age and sex, HealthDirect.

Why Shop ZMA Supplements at Nutrition Warehouse

• 120+ Stores Australia Wide – Find your store now
• Click & Collect from any of our stores
• Same Day Supps – Get your order within 2 hours with same-day delivery
• Australia's most trusted brands
• Expert team support online and in store
• Free delivery on qualifying orders
• Backed by the 5 Scoop Guarantee – complete peace of mind
• Best Price Guarantee – Find a lower-priced identical stocked item that's in stock with a competitor in Australia (even if it's on sale), we will not only match it, WE'LL BEAT IT BY $1, plus you get a FREE SHAKER valued at $8.95.