PlainVitamins

Ultra-Mag

by Source Naturals · tablet or pill · 120 tablets

  • On the market (NIH)
  • UPC 0 21078 00803 3
  • DSLD label 272958
  • Serving 1 to 2 tablets; amounts per 2 tablets
  • 60 servings

Ultra-Mag by Source Naturals lists 2 ingredients, 2 with an amount per serving of 2 tablets, such as 30 mg of vitamin B6 and 400 mg of magnesium, beside 2 Nutrition Facts rows (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on August 23, 2022.

What is in Ultra-Mag?

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

Ultra-Mag: Supplement Facts rows against the market (DSLD label 272958, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories10 Calories
Total Carbohydrates1 g1%Carbohydrate in Ultra-Mag against 21,979 products1 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.1 g

74% of 21,979 products listing carbohydrate give more (median 3 g).

Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl)30 mg1,765%Vitamin B6 in Ultra-Mag against 15,277 products30 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg30 mg

Higher than 82% of 15,277 products listing vitamin B6 (median 6 mg).

Magnesiumas Magnesium Citrate, Magnesium Glycinate, Magnesium Malate400 mg95%Magnesium in Ultra-Mag against 14,003 products400 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg400 mg

Higher than 92% of 14,003 products listing magnesium (median 86 mg). 1.1 times the adult UL a day.

Sodium5 mg1%Sodium in Ultra-Mag against 14,514 products5 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.5 mg

89% of 14,514 products listing sodium give more (median 55 mg).

Source: NIH ODS Dietary Supplement Label Database, label 272958 (entered August 23, 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:

  • At 1 serving a day, the most its directions give, the label lists 400 mg of magnesium, 1.1 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.

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: 1 or 2 tablets daily 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, preservatives, or artificial color, flavor or fragrance.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 272958.

What else is on the label?

Other ingredients: Stearic Acid, Acacia, modified Cellulose Gum, Magnesium Stearate, Silica.

How many labels does Ultra-Mag have?

6 labels are on file under this name since April 25, 2017: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 296335 Entered September 25, 2023 · off the market July 6, 2022 · 120 tablets · UPC 0 21078 00803 3
  2. Label 296334 Entered August 23, 2023 · off the market July 6, 2022 · 240 tablets · UPC 0 21078 00033 4
  3. Label 272958 (current) Entered August 23, 2022 · on the market · 120 tablets · UPC 0 21078 00803 3
  4. Label 78684 Entered January 25, 2018 · off the market December 22, 2021 · 120 tablets · UPC 0 21078 00803 3
  5. Label 78681 Entered September 21, 2017 · on the market · 60 tablets · UPC 0 21078 00802 6
  6. Label 72987 Entered April 25, 2017 · on the market · 240 tablets · UPC 0 21078 00033 4

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?