Mag'C
by Intensive Nutrition · capsule · 90 vegetarian capsules
- Off the market since October 2023 (NIH)
- DSLD label 23696
- Serving 2 to 6 capsules; amounts per 1 capsule
Mag'C by Intensive Nutrition lists 4 ingredients, 4 with an amount per serving of 1 capsule, such as 726 mg of magnesium ascorbate, 50 mg of magnesium, 726 mg of vitamin C and 160 mg of ascorbyl palmitate. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2013.
What is in Mag'C?
Each row as the label prints it, per serving of 1 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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Magnesium Ascorbate | 726 mg | ||
| MagnesiumMagnesium Note: elemental | 50 mg | 14% | 59% of 14,003 products listing magnesium give more (median 86 mg). |
| Vitamin Cas Vitamin C AscorbateVitamin C (Form: as Vitamin C Ascorbate) | 726 mg | 1,200% | Higher than 91% of 18,583 products listing vitamin C (median 100 mg). |
| Ascorbyl Palmitate | 160 mg |
Source: NIH ODS Dietary Supplement Label Database, label 23696 (entered July 25, 2013), 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:
- Its 886 mg of vitamin C (2 rows of the label added together) is higher than 91% of the 18,583 vitamin C products that print an amount; 1,729 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?
3 products list the very same ingredients; the nearest amounts come first.
- Asc2P 500 mgSuperSmart · off the market same ingredients
- Asc2PSuperSmart · off the market same ingredients
- Magnesium AscorbateIntensive Nutrition · off the market same ingredients
- Magnesium Ascorbate 1000 mgSource Naturals 2 shared, 63% alike
- Dyno-Mins Magnesium 250 mgNature's Plus · off the market 2 shared, 61% alike
- Cal/Mag AscorbateDouglas Laboratories · off the market 3 shared, 51% alike
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: 2-6 capsules daily between meals or as directed by your health professional
- Warnings
- Caution: Keep the bottle closed in a cool, dry place and out of the reach of children
- Allergens and what it does not contain
- FREE OF YEAST, SUGAR, STARCH,EGG, GLUTEN, CORN, MILK, ARTIFICIAL COLORS, SWEETENERS OR PRESERVATIVES.
Source: label statements in DSLD label 23696.
What else is on the label?
Other ingredients: Magnesium Stearate.
How many labels does Mag'C have?
One label is on file, entered on July 25, 2013.
- Label 23696 (current) Entered July 25, 2013 · off the market October 4, 2023 · 90 vegetarian capsules
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Intensive Nutrition Inc. (manufacturer), San Leandro, CA. All Intensive Nutrition products.