PlainVitamins

Zma

by Optimum Nutrition · capsule · 180 capsules

  • On the market (NIH)
  • UPC 7 48927 02171 4
  • DSLD label 57570
  • Serving 3 capsules
  • 60 servings

Zma by Optimum Nutrition lists 3 ingredients, 3 with an amount per serving of 3 capsules, such as 10.5 mg of vitamin B6, 450 mg of magnesium and 30 mg of zinc. Its current label entered the NIH Dietary Supplement Label Database on March 24, 2016.

What is in Zma?

Each row as the label prints it, per serving of 3 capsules. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Zma: Supplement Facts rows against the market (DSLD label 57570, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin B6as Pyridoxine HydrochlorideVitamin B6 (Form: as Pyridoxine HCl)10.5 mg525%Vitamin B6 in ZMA against 15,277 products10.5 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg10.5 mg

Higher than 65% of 15,277 products listing vitamin B6 (median 6 mg). Per day at the most servings: 31.5 mg.

Magnesiumas Magnesium AspartateMagnesium (Form: as Magnesium Aspartate)450 mg113%Magnesium in ZMA against 14,003 products450 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg450 mg

Higher than 95% of 14,003 products listing magnesium (median 86 mg). Per day at the most servings: 1,350 mg. 3.9 times the adult UL a day.

Zincas Zinc Aspartate, Zinc MonomethionineZinc (Form: as Zinc Aspartate, and Zinc Monomethionine)30 mg200%Zinc in ZMA against 13,186 products30 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg30 mg

Higher than 90% of 13,186 products listing zinc (median 11 mg). Per day at the most servings: 90 mg. 2.3 times the adult UL a day.

Source: NIH ODS Dietary Supplement Label Database, label 57570 (entered March 24, 2016), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • At 3 servings a day, the most its directions give, the label lists 1,350 mg of magnesium, 3.9 times the adult Tolerable Upper Intake Level.
  • At 3 servings a day, the most its directions give, the label lists 90 mg of zinc, 2.3 times the adult Tolerable Upper Intake Level.

The NIH database records 2 to 3 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

6 products list the very same ingredients; the nearest amounts come first.

  • ZmaPrecision Engineered · off the market same ingredients
  • ZMA Mineral Support FormulaGood 'N Natural · off the market same ingredients
  • ZmaScientific Nutrition For Advanced Conditioning SNAC · off the market same ingredients
  • ZMA With OptizincPrecision Engineered same ingredients
  • ZmaSci-Fit same ingredients
  • Max ZMAMM Sports Nutrition same ingredients

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
SUGGESTED USE: MEN: Take 3 capsules before bed. WOMEN: Take 2 capsules before bed.
Warnings
WARNING: CONSULT YOUR PHYSICIAN BEFORE USING THIS PRODUCT IF YOUR ARE TAKING ANY MEDICATIONS OR ARE UNDER A PHYSICIAN'S CARE FOR MEDICAL CONDITION. NOT FOR USE BY THOSE UNDER THE AGE OF 18 OR WOMEN THAT ARE PREGNANT, TRYING TO GET PREGNANT, OR NURSING.
NOT FOR USE BY THOSE UNDER THE AGE OF 18 OR WOMEN THAT ARE PREGNANT, TRYING TO GET PREGNANT, OR NURSING.
Storage
STORE IN A COOL, DRY PLACE.

Source: label statements in DSLD label 57570.

What else is on the label?

Other ingredients: Gelatin, Microcrystalline Cellulose, Magnesium Stearate, Magnesium Oxide, Zinc Oxide.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): MANUFACTURED IN THE USA This product contains ingredients of international and domestic origin.

How many labels does Zma have?

2 labels are on file under this name since March 24, 2016: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 57570 (current) Entered March 24, 2016 · on the market · 180 capsules · UPC 7 48927 02171 4
  2. Label 57567 Entered March 24, 2016 · on the market · 90 capsules · UPC 7 48927 02482 1

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names OPTIMUM NUTRITION (manufacturer), Aurora, IL. All Optimum Nutrition products.

Where next?