PlainVitamins

Magnesium & Potassium Aspartate

by NOW · capsule · 120 veg capsules

  • On the market (NIH)
  • UPC 7 33739 01320 0
  • DSLD label 204986
  • Serving 2 veg capsules
  • 60 servings

Magnesium & Potassium Aspartate by NOW lists 3 ingredients, 3 with an amount per serving of 2 veg capsules, such as 250 mg of magnesium, 99 mg of potassium and 100 mg of taurine. Its current label entered the NIH Dietary Supplement Label Database on July 24, 2019.

What is in Magnesium & Potassium Aspartate?

Each row as the label prints it, per serving of 2 veg 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).

Magnesium & Potassium Aspartate: Supplement Facts rows against the market (DSLD label 204986, January 2026 release)
IngredientAmount% DVAmong products listing it
Magnesiumas Magnesium AspartateMagnesium (Form: from Magnesium Aspartate)250 mg60%Magnesium in Magnesium & Potassium Aspartate against 14,003 products250 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg250 mg

Higher than 83% of 14,003 products listing magnesium (median 86 mg). Per day at the most servings: 500 mg. 1.4 times the adult UL a day.

Potassiumas Potassium AspartatePotassium (Form: from Potassium Aspartate)99 mg2%Potassium in Magnesium & Potassium Aspartate against 11,614 products99 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg99 mg

49% of 11,614 products listing potassium give more (median 99 mg). Per day at the most servings: 198 mg.

TaurineTaurine Note: free-form100 mgTaurine in Magnesium & Potassium Aspartate against 2,337 products100 mg per serving; the middle half of products list 110 mg to 1,000 mg, the median 500 mg.100 mg

76% of 2,337 products listing taurine give more (median 500 mg). Per day at the most servings: 200 mg.

Source: NIH ODS Dietary Supplement Label Database, label 204986 (entered July 24, 2019), 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 2 servings a day, the most its directions give, the label lists 500 mg of magnesium, 1.4 times the adult Tolerable Upper Intake Level.

The NIH database records 1 to 2 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?

1 product lists 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 Usage: Take 2 capsules 1 to 2 times daily.
Warnings
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 or tree nut 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 or tree nut ingredients.
Storage
Store in a cool, dry place after opening.

Source: label statements in DSLD label 204986.

What else is on the label?

Other ingredients: Hypromellose, Rice Flour, Stearic Acid, Silicon Dioxide.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Non-GMO Triangle K; GMP Quality Assured.

How many labels does Magnesium & Potassium Aspartate have?

6 labels are on file under this name since October 25, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 204986 (current) Entered July 24, 2019 · on the market · 120 veg capsules · UPC 7 33739 01320 0
  2. Label 72121 Entered April 25, 2017 · off the market December 6, 2018 · 120 veg capsules · UPC 7 33739 01320 0
  3. Label 70618 Entered February 24, 2017 · off the market March 7, 2017 · 120 veg capsules · UPC 7 33739 01320 0
  4. Label 60662 Entered June 24, 2016 · off the market November 30, 2016 · 120 veg capsules · UPC 7 33739 01320 0
  5. Label 51761 Entered November 24, 2015 · off the market March 31, 2016 · 120 capsules · UPC 7 33739 01320 0
  6. Label 14598 Entered October 25, 2012 · off the market September 30, 2015 · 120 capsules · UPC 7 33739 01320 0

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 products.

Where next?