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Optimum Nutrition Generic ZMA Capsules Review

ZMA is a dietary supplement containing Zinc, Magnesium, and Vitamin B6, designed to support muscle recovery, enhance sleep quality, and boost athletic performance by aiding metabolic and hormonal functions.

Product Focus: Hormone Balance for MenAlso covers:Sexual health
Tier ⓘ
Members
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
Members
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
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Biohacker Mentions
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Cost per month
$15
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Study, Trial or Testing Result SummaryMembersHuman studies

Magnesium is at a dose here, the daily limit, so members can take . In one trial, men who were sedentary or trained in tae kwon do took magnesium daily for 4 weeks, and their free and total testosterone rose, so in those who exercised. …

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Review Totals and SummaryMembers2,080 reviews
2,080 reviews · Amazon 1,124 · IHerb 425 · Hyugalife 292 · Jymsupplementscience 232 · Scitron 7

Feedback for Generic ZMA Capsules across popular online platforms, such as Amazon, iHerb, and Hyugalife, generally skews , with users sharing favorable experiences. A recurring theme in user reviews is their with the product's perceived effectiveness. …

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Biohacker SummaryMembersWhat our biohacker panel says

The common reason is sleep, with taking or suggesting 400 mg before bed, while others cite its role in body reactions, heart , mood, bone and testosterone. For forms, the panel favors glycinate and threonate for sleep, and one panelist calls the oxide form the worst because of absorption. …

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RAL SummaryMembersThe tier and why

The tier rests on a pooled review of 31 trials in which -dose vitamin B6 prolactin, together with reviews. It one tier because 5 of our biohacker panel against or stopped it. …

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More DetailsMembersBody systems · Combine with · Possible side effects

Body systems: Endocrine system, Reproductive system. Combine with and possible side are for members.

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Supplement FactsVitamin B6 10 mg · Magnesium 435 mg · Zinc 28 mg
Supplement Facts
Serving Size 3 Capsules
Servings Per Container 60
Amount Per Serving% Daily Value
Vitamin B6 (as pyridoxine hydrochloride)10 mg588%
Magnesium (as magnesium aspartate, magnesium oxide)435 mg104%
Zinc (as zinc aspartate, zinc monomethionine, zinc oxide)28 mg255%

Directions: Typically 3 capsules for men or 2 for women, taken 30-60 minutes before bedtime.

Barcode (UPC) 748927021714 · Label source: the brand's label · Report a label change

Where to BuyOptimum Nutrition
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Graded October 24, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.