Optimum Nutrition ZMA



ZMA by ON is formulated with potent ingredients. If you want to get the most from your hard work in the gym and tip the scales in your favor, then why wait? Get ZMA by Optimum Nutrition today.

Have you ever heard the saying "You don't grow inside the gym, you grow while your sleeping"? Well, that simply saying just happens to be true. During sleep, our bodies release hormones that repair torn and damaged muscle fibers causing us to gain muscle. Due to this very important anabolic growth window, Optimum Nutrition introduces its nighttime recovery formula called ZMA by ON. This formula will move the scales in your favor and get the results you deserve.


Discuss with your physician before taking if you have a medical condition or are taking any prescription medications. Stop use and discuss with your physician if any negative effects occur. Do not exceed the suggested dose. Do not take if pregnant or lactating. Must be 18 years old to use this product. Keep away from children. Do not use if the seal has been tampered with. Store in a cool, dry place.

Supplement Facts

60 servings per container
Serving size
3 capsules
Vitamin B6 (as pyridoxine hydrochloride
10.5 mg
Magnesium (as magnesium aspartate, magnesium oxide)
450 mg
Zinc (as zinc aspartate, zinc monomethionine, zinc oxide)
30 mg

Percent Daily Values are based on a 2,000 calorie diet.

Other Ingredients: Gelatin, Microcrystalline Cellulose, Magnesium Stearate.

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Take 2 or 3 capsules daily on an empty stomach 30-45 minutes before bedtime. For best results, men should use 3 capsules daily. The recommended dosage for women is 2 capsules per day. Avoid taking with dairy or other calcium-containing foods or supplements.

Additional information

Weight 3.2 oz
Dimensions 8 × 6 × 6 in