PlainVitamins

Zma

by Swanson Ultra · capsule · 90 capsules

  • Off the market since December 2023 (NIH)
  • UPC 0 87614 21006 3
  • DSLD label 181104
  • Serving 3 capsules
  • 30 servings

Zma by Swanson Ultra lists 3 ingredients, 3 with an amount per serving of 3 capsules, such as 9 mg of vitamin B6, 429 mg of magnesium and 27 mg of zinc. Its current label entered the NIH Dietary Supplement Label Database on September 21, 2018.

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 181104, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl) Note: USP9 mg529%Vitamin B6 in ZMA against 15,277 products9 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg9 mg

Higher than 54% of 15,277 products listing vitamin B6 (median 6 mg).

Magnesiumas Magnesium Aspartate, Zinc AspartateMagnesium (Form: covalently bound from Zinc Aspartate, Magnesium Aspartate)429 mg102%Magnesium in ZMA against 14,003 products429 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg429 mg

Higher than 95% of 14,003 products listing magnesium (median 86 mg). 1.2 times the adult UL a day.

Zincas Magnesium Aspartate, Zinc Aspartate, Zinc Aspartate L-OptiZincZinc (Form: as Zinc L-Monomethionine, Zinc Aspartate L-OptiZinc, and covalently bound Zinc Aspartate, Magnesium Aspartate)27 mg245%Zinc in ZMA against 13,186 products27 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg27 mg

Higher than 90% of 13,186 products listing zinc (median 11 mg).

Zma2.4 g

Source: NIH ODS Dietary Supplement Label Database, label 181104 (entered September 21, 2018), 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 1 serving a day, the most its directions give, the label lists 429 mg of magnesium, 1.2 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.

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: As a dietary supplement, men should take three capsules 30–60 minutes before bedtime with water; women take two capsules 30–60 minutes before bedtime with water. For best results, avoid taking with foods or supplements containing calcium.
Warnings
Do not use if seal is broken.
Keep out of reach of children.
For best results, avoid taking with foods or supplements containing calcium.
Warning: If you are pregnant, nursing, have an autoimmune disease or are taking any prescription drugs, consult your healthcare provider before using.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 181104.

What else is on the label?

Other ingredients: Microcrystalline Cellulose, Gelatin.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Guaranteed purity & potency.

How many labels does Zma have?

One label is on file, entered on September 21, 2018.

  1. Label 181104 (current) Entered September 21, 2018 · off the market December 5, 2023 · 90 capsules · UPC 0 87614 21006 3

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

Who makes it?

The label names Swanson Health Products (distributor), Fargo, ND. All Swanson Ultra products.

Where next?