PlainVitamins

C-Ultratabs

by Metagenics · tablet or pill · 90 tablets

  • On the market (NIH)
  • DSLD label 26719
  • Serving 1 tablet
  • 90 servings

C-Ultratabs by Metagenics lists 4 ingredients, 4 with an amount per serving of 1 tablet, such as 1,000 mg of vitamin C, 65 mg of calcium, 35 mg of magnesium and 15 mg of potassium, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on October 25, 2013.

What is in C-Ultratabs?

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

C-Ultratabs: Supplement Facts rows against the market (DSLD label 26719, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Vitamin C AscorbateVitamin C (Form: as {Vitamin C} Ascorbate)1,000 mg1,667%Vitamin C in C-Ultratabs 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).

Calciumas Calcium AscorbateCalcium (Form: as Calcium Ascorbate)65 mg7%Calcium in C-Ultratabs against 17,831 products65 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg65 mg

67% of 17,831 products listing calcium give more (median 115 mg).

Magnesiumas Magnesium AscorbateMagnesium (Form: as Magnesium Ascorbate)35 mg9%Magnesium in C-Ultratabs against 14,003 products35 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg35 mg

73% of 14,003 products listing magnesium give more (median 86 mg).

Sodiumas Sodium AscorbateSodium (Form: as Sodium Ascorbate)30 mg1%Sodium in C-Ultratabs against 14,514 products30 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.30 mg

62% of 14,514 products listing sodium give more (median 55 mg).

Potassiumas Potassium AscorbatePotassium (Form: as Potassium Ascorbate)15 mg1%Potassium in C-Ultratabs against 11,614 products15 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg15 mg

91% of 11,614 products listing potassium give more (median 99 mg).

Source: NIH ODS Dietary Supplement Label Database, label 26719 (entered October 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 1,000 mg of vitamin C is higher than 91% of the 18,583 vitamin C products that print an amount; 445 list more.
  • 91% of the 11,614 products that print an amount of potassium list more than its 15 mg of potassium (median 99 mg).

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?

1 product lists the very same ingredients; the nearest amounts come first.

  • Infini-CNatrium Health same ingredients

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 tablet daily or as directed by your healthcare practitioner.
Warnings
CAUTION: Keep out of the reach of children.
Allergens and what it does not contain
Formulated to Exclude: Wheat, gluten, corn protein, soy, animal or dairy products, nuts, tree nuts, fish, crustacean shellfish, colors, artificial sweeteners, and preservatives.
Storage
STORAGE: Keep tightly closed in a cool, dry place.

Source: label statements in DSLD label 26719.

What else is on the label?

Other ingredients: Cellulose, Microcrystalline Cellulose, Stearic Acid, Croscarmellose Sodium, Silica, Coating.

How many labels does C-Ultratabs have?

One label is on file, entered on October 25, 2013.

  1. Label 26719 (current) Entered October 25, 2013 · on the market · 90 tablets

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

Who makes it?

The label names METAGENICS, INC. Makers of Professional Quality Supplements (manufacturer, distributor), San Clemente, CA. All Metagenics products.

Where next?