PlainVitamins

Ultra Potent-C 1000

by Metagenics · tablet or pill · 90 tablets

  • On the market (NIH)
  • UPC 7 55571 03061 0
  • DSLD label 295870
  • Serving 1 tablet
  • 90 servings

Ultra Potent-C 1000 by Metagenics lists 11 ingredients, 11 with an amount per serving of 1 tablet, such as 1,000 mg of vitamin C, 70 mg of niacin, 40 mg of calcium and 33 mg of L-lysine, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on August 23, 2023.

What is in Ultra Potent-C 1000?

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).

Ultra Potent-C 1000: Supplement Facts rows against the market (DSLD label 295870, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin C1,000 mg1,111%Vitamin C in Ultra Potent-C 1000 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). Per day at the most servings: 2,000 mg.

Niacin70 mg438%Niacin in Ultra Potent-C 1000 against 12,413 products70 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg70 mg

Higher than 85% of 12,413 products listing niacin (median 20 mg). Per day at the most servings: 140 mg. 4 times the adult UL a day.

Calcium40 mg3%Calcium in Ultra Potent-C 1000 against 17,831 products40 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg40 mg

79% of 17,831 products listing calcium give more (median 115 mg). Per day at the most servings: 80 mg.

Sodium10 mg1%Sodium in Ultra Potent-C 1000 against 14,514 products10 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.10 mg

78% of 14,514 products listing sodium give more (median 55 mg). Per day at the most servings: 20 mg.

L-Lysine33 mgLysine in Ultra Potent-C 1000 against 1,250 products33 mg per serving; the middle half of products list 148.25 mg to 996.25 mg, the median 500 mg.33 mg

91% of 1,250 products listing lysine give more (median 500 mg). Per day at the most servings: 66 mg.

Citrus Bioflavonoid Complex32 mgFlavonoid in Ultra Potent-C 1000 against 2,343 products32 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.32 mg

62% of 2,343 products listing flavonoid give more (median 50 mg). Per day at the most servings: 64 mg.

full spectrum Bioflavonoids45%14.4 mg
Tetrasodium Pyrophosphate14 mg
Alpha D-Ribofuranose13 mgRibose in Ultra Potent-C 1000 against 199 products0.013 g per serving; the middle half of products list 0.5 g to 5 g, the median 2 g.0.013 g

94% of 199 products listing ribose give more (median 2 g). Per day at the most servings: 0.026 g.

Xylitol9 mgXylitol in Ultra Potent-C 1000 against 220 products0.009 g per serving; the middle half of products list 1 g to 2.5 g, the median 2 g.0.009 g

99% of 220 products listing xylitol give more (median 2 g). Per day at the most servings: 0.018 g.

L-Cysteine8 mgCysteine in Ultra Potent-C 1000 against 516 products8 mg per serving; the middle half of products list 30 mg to 200 mg, the median 85 mg.8 mg

89% of 516 products listing cysteine give more (median 85 mg). Per day at the most servings: 16 mg.

L-Glutathione5 mgGlutathione in Ultra Potent-C 1000 against 717 products5 mg per serving; the middle half of products list 10 mg to 200 mg, the median 50 mg.5 mg

85% of 717 products listing glutathione give more (median 50 mg). Per day at the most servings: 10 mg.

Source: NIH ODS Dietary Supplement Label Database, label 295870 (entered August 23, 2023), 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.
  • At 2 servings a day, the most its directions give, the label lists 140 mg of niacin, 4 times the adult Tolerable Upper Intake Level.
  • 91% of the 1,250 products that print an amount of lysine list more than its 33 mg of L-lysine (filed by NIH under lysine) (median 500 mg).
  • 94% of the 199 products that print an amount of ribose list more than its 0.013 g of alpha D-ribofuranose (filed by NIH under ribose) (median 2 g).
  • 99% of the 220 products that print an amount of xylitol list more than its 0.009 g of xylitol (median 2 g).
  • 89% of the 516 products that print an amount of cysteine list more than its 8 mg of L-cysteine (filed by NIH under cysteine) (median 85 mg).

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?

The products whose ingredient lists overlap most with Ultra Potent-C 1000's, rare ingredients counting for more.

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 up to two times daily or as directed by your healthcare practitioner.
Warnings
Caution: keep out of the reach of children.
Practitioner exclusive
Allergens and what it does not contain
This product is non-GMO, gluten-free and vegetarian.
Certified Gluten Free GFCO.org (Gluten-Free Certification Organization)
Storage
Storage: keep tightly closed in a cool, dry place.

Source: label statements in DSLD label 295870.

What else is on the label?

Other ingredients: Calcium Carbonate, Niacinamide Ascorbate, Ascorbic Acid, Sodium Ascorbate, Magnesium Ascorbate, L-Lysine Hydrochloride, Ascorbyl Palmitate, Citrus Bioflavonoid Complex, Potassium Ascorbate, Tetrasodium Pyrophosphate, Alpha D-Ribofuranose, L-Cysteine Hydrochloride, Xylitol, L-Glutathione, Microcrystalline Cellulose, Croscarmellose Sodium, Silica, Magnesium Stearate, Stearic Acid, Hypromellose, Medium Chain Triglycerides, Hydroxypropylcellulose.

How many labels does Ultra Potent-C 1000 have?

5 labels are on file under this name since November 25, 2013: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 295870 (current) Entered August 23, 2023 · on the market · 90 tablets · UPC 7 55571 03061 0
  2. Label 265106 Entered May 19, 2022 · off the market September 7, 2022 · 90 tablets · UPC 7 55571 03061 0
  3. Label 216592 Entered March 24, 2020 · off the market October 1, 2021 · 90 tablets · UPC 7 55571 03061 0
  4. Label 209492 Entered November 21, 2019 · off the market December 20, 2019 · 90 tablets
  5. Label 27759 Entered November 25, 2013 · off the market July 24, 2018 · 90 tablets · UPC 7 55571 03061 0

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

Who makes it?

The label names Metagenics (manufacturer), Gig Harbor, WA. All Metagenics products.

Where next?