PlainVitamins

Magnesium Ascorbate

by Source Naturals · powder · 8 ounces

  • On the market (NIH)
  • UPC 0 21078 00834 7
  • DSLD label 274897
  • Serving 1.25 g (.25 Rounded Teaspoon)
  • 181 servings

Magnesium Ascorbate by Source Naturals lists 2 ingredients, 2 with an amount per serving of 1.25 g, such as 1,000 mg of vitamin C and 68 mg of magnesium. Its current label entered the NIH Dietary Supplement Label Database on November 22, 2022.

What is in Magnesium Ascorbate?

Each row as the label prints it, per serving of 1.25 g. 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 Ascorbate: Supplement Facts rows against the market (DSLD label 274897, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Magnesium Ascorbate1,000 mg1,111%Vitamin C in Magnesium Ascorbate against 18,583 products1,000 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg1,000 mg

Higher than 91% of 18,583 products listing vitamin C (median 100 mg).

Magnesiumas Magnesium Ascorbate68 mg16%Magnesium in Magnesium Ascorbate against 14,003 products68 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg68 mg

55% of 14,003 products listing magnesium give more (median 86 mg).

Source: NIH ODS Dietary Supplement Label Database, label 274897 (entered November 22, 2022), 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:

  • Its 1,000 mg of vitamin C is higher than 91% of the 18,583 vitamin C products that print an amount; 445 list more.

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: A rounded 1/4 teaspoon daily, mixed in water or juice as desired, preferably with a meal.
Warnings
Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.
Do not use if either tamper-evident seal is broken or missing.
Keep out of the reach of children.
Allergens and what it does not contain
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, salt, preservatives, or artificial color, flavor or fragrance.
Storage
Keep dry, away from heat and direct sunlight. Always replace cap. Do not refrigerate.

Source: label statements in DSLD label 274897.

How many labels does Magnesium Ascorbate have?

One label is on file, entered on November 22, 2022.

  1. Label 274897 (current) Entered November 22, 2022 · on the market · 8 ounces · UPC 0 21078 00834 7

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

Who makes it?

The label names Source Naturals, Inc. (distributor), Santa Cruz, CA. All Source Naturals products.

Where next?