PlainVitamins

Zma

by NOW Sports · capsule · 90 veg capsules

  • On the market (NIH)
  • UPC 7 33739 02200 4
  • DSLD label 314526
  • Serving 2 to 3 capsules; amounts per 3 capsules
  • 30 servings

Zma by NOW Sports lists 3 ingredients, 3 with an amount per serving of 3 capsules, such as 15 mg of vitamin B6, 450 mg of magnesium and 30 mg of zinc. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2024.

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 314526, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin B6as Pyridoxine Hydrochloride15 mg882%Vitamin B6 in ZMA against 15,277 products15 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg15 mg

Higher than 68% of 15,277 products listing vitamin B6 (median 6 mg).

Magnesiumas Magnesium Aspartate, Magnesium Oxideelemental450 mg107%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). 1.3 times the adult UL a day.

Zincas Zinc Aspartate, Zinc Mono-L-Methionine, Zinc Oxideelemental30 mg273%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).

Source: NIH ODS Dietary Supplement Label Database, label 314526 (entered July 25, 2024), version 9.4.0. See the label on DSLD or its label image (PDF). 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 1 serving a day, the most its directions give, the label lists 450 mg of magnesium, 1.3 times the adult Tolerable Upper Intake Level.

The NIH database records one serving 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.

  • Xtreme ZMAXPI Xtreme Pharmaceutical Innovations · off the market same ingredients
  • ZmxInnovaPharm same ingredients
  • Zmx2ALLMAX same ingredients
  • 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

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 usage: Take 3 capsules daily (men) or 2 capsules daily (women), preferably on an empty stomach, 30-60 minutes before bedtime. For best results, avoid taking with dairy or other calcium-containing foods or supplements.
Warnings
For best results, avoid taking with dairy or other calcium-containing foods or supplements.
Caution: For adults only.
Consult physician if pregnant/nursing, taking medication, or have a medical condition.
Keep out of reach of children.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Allergens and what it does not contain
Non-GMO
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients.
Storage
Store in a cool, dry, dark place after opening.

Source: label statements in DSLD label 314526.

What else is on the label?

Other ingredients: Hypromellose, Stearic Acid, Silicon Dioxide.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Crescent H (Halal) GMP Quality Assured; Informed Sport We Test You Trust Triangle K (Kosher). Listed with: Informed Sport or Informed Choice (a seal is the label's claim; the certifier's own list confirms it).

How many labels does Zma have?

13 labels are on file under this name since October 1, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 335366 Entered September 25, 2025 · off the market January 21, 2025 · 180 veg capsules · UPC 7 33739 02201 1
  2. Label 314526 (current) Entered July 25, 2024 · on the market · 90 veg capsules · UPC 7 33739 02200 4
  3. Label 314527 Entered June 20, 2024 · off the market January 21, 2025 · 180 veg capsules · UPC 7 33739 02201 1
  4. Label 205534 Entered September 24, 2019 · off the market February 12, 2024 · 90 capsules · UPC 7 33739 02200 4
  5. Label 205537 Entered July 24, 2019 · off the market February 12, 2024 · 180 capsules · UPC 7 33739 02201 1
  6. Label 70921 Entered February 24, 2017 · off the market December 6, 2018 · 180 capsules · UPC 7 33739 02201 1
  7. Label 70918 Entered February 24, 2017 · off the market December 6, 2018 · 90 capsules · UPC 7 33739 02200 4
  8. Label 66041 Entered October 22, 2016 · off the market November 30, 2016 · 180 capsules · UPC 7 33739 02201 1
  9. Label 62431 Entered July 25, 2016 · off the market November 30, 2016 · 90 capsules · UPC 7 33739 02200 4
  10. Label 28470 Entered December 24, 2013 · off the market April 18, 2016 · 180 capsules · UPC 7 33739 02201 1
  11. Label 28468 Entered December 24, 2013 · off the market March 31, 2016 · 90 capsules · UPC 7 33739 02200 4
  12. Label 13521 Entered November 25, 2013 · off the market February 18, 2013 · 180 capsules · UPC 7 33739 02201 1
  13. Label 13519 Entered October 1, 2012 · off the market January 17, 2013 · 90 capsules · UPC 7 33739 02200 4

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

Who makes it?

The label names NOW FOODS (manufacturer), Bloomingdale, IL. All NOW Sports products.

Where next?