PlainVitamins

Potassium with Extend-Release Magnesium

by Life Extension · capsule · 60 vegetarian capsules

  • On the market (NIH)
  • UPC 7 37870 23096 0
  • DSLD label 328641
  • Serving 1 vegetarian capsule
  • 60 servings

Potassium with Extend-Release Magnesium by Life Extension lists 2 ingredients, 2 with an amount per serving of 1 vegetarian capsule, such as 250 mg of magnesium and 99 mg of potassium. Its current label entered the NIH Dietary Supplement Label Database on May 21, 2025.

What is in Potassium with Extend-Release Magnesium?

Each row as the label prints it, per serving of 1 vegetarian capsule. 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).

Potassium with Extend-Release Magnesium: Supplement Facts rows against the market (DSLD label 328641, January 2026 release)
IngredientAmount% DVAmong products listing it
Magnesiumas Magnesium Citrate, ZumXR Magnesium Oxide250 mg60%Magnesium in Potassium with Extend-Release Magnesium 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 Chloride99 mg2%Potassium in Potassium with Extend-Release Magnesium 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.

Source: NIH ODS Dietary Supplement Label Database, label 328641 (entered May 21, 2025), 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 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?

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
Directions: Take one (1) capsule once or twice daily, or as recommended by a healthcare practitioner.
Warnings
Read the entire label and follow directions carefully prior to use.
Caution: If taken in high doses, magnesium may have a laxative effect. If this occurs, divide dosing, reduce intake, or discontinue product.
Warnings: Keep out of reach of children.
Do not exceed recommended dose. Do not purchase if outer seal is broken or damaged.
When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
To report a serious adverse event or obtain product information, contact 1-866-280-2852.
Allergens and what it does not contain
Gluten free Non GMO LE Certified
Storage
Store tightly closed in a cool, dry place.

Source: label statements in DSLD label 328641.

What else is on the label?

Other ingredients: Cellulose, Microcrystalline Cellulose, Rice Concentrate, Ethylcellulose, Medium Chain Triglyceride, Oleic Acid, Hydroxypropyl Methylcellulose, Silica.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Non GMO LE Certified.

How many labels does Potassium with Extend-Release Magnesium have?

4 labels are on file under this name since December 22, 2019: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 328641 (current) Entered May 21, 2025 · on the market · 60 vegetarian capsules · UPC 7 37870 23096 0
  2. Label 334872 Entered April 24, 2025 · on the market · 60 vegetarian capsules · UPC 7 37870 23096 0
  3. Label 232470 Entered August 23, 2020 · off the market August 9, 2023 · 60 vegetarian capsules · UPC 7 37870 23096 0
  4. Label 211017 Entered December 22, 2019 · off the market July 14, 2020 · 60 vegetarian capsules · UPC 7 37870 23096 0

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

Who makes it?

The label names Quality Supplements and Vitamins, Inc. (distributor), Ft. Lauderdale, FL. All Life Extension products.

Where next?