PlainVitamins

Ultimate Ascorbate C 1,000 mg

by Source Naturals · tablet or pill · 100 tablets

  • On the market (NIH)
  • UPC 0 21078 00832 3
  • DSLD label 272974
  • Serving 2 tablets
  • 50 servings

Ultimate Ascorbate C 1,000 mg by Source Naturals lists 11 ingredients, 11 with an amount per serving of 2 tablets, such as 2,000 mg of vitamin C, 2 mcg (80 IU) of vitamin D3, 145 mg of calcium and 98 mg of magnesium, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on September 22, 2022.

What is in Ultimate Ascorbate C 1,000 mg?

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).

Ultimate Ascorbate C 1,000 mg: Supplement Facts rows against the market (DSLD label 272974, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories15 Calories
Total Carbohydrates3 g1%Carbohydrate in Ultimate Ascorbate C 1,000 mg against 21,979 products3 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.3 g

47% of 21,979 products listing carbohydrate give more (median 3 g). Per day at the most servings: 6 g.

Vitamin Cas Calcium Ascorbate, Magnesium Ascorbate, Manganese AscorbateVitamin C (Form: as Calcium Ascorbate, Potassium Ascorbate, Magnesium Ascorbate, Zinc Ascorbate, & Manganese Ascorbate)2,000 mg2,222%Vitamin C in Ultimate Ascorbate C 1,000 mg against 18,583 products2,000 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg2,000 mg

Higher than over 99% of 18,583 products listing vitamin C (median 100 mg). Per day at the most servings: 4,000 mg. 2 times the adult UL a day.

Vitamin D3as Cholecalciferol2 mcg (80 IU)11%Vitamin D in Ultimate Ascorbate C 1,000 mg against 14,175 products2 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg2 mcg

96% of 14,175 products listing vitamin D give more (median 15 mcg). Per day at the most servings: 4 mcg.

Calciumas Calcium Ascorbate145 mg11%Calcium in Ultimate Ascorbate C 1,000 mg against 17,831 products145 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg145 mg

Higher than 57% of 17,831 products listing calcium (median 115 mg). Per day at the most servings: 290 mg.

Magnesiumas Magnesium Ascorbate, Magnesium Citrate, Magnesium Oxide98 mg23%Magnesium in Ultimate Ascorbate C 1,000 mg against 14,003 products98 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg98 mg

Higher than 51% of 14,003 products listing magnesium (median 86 mg). Per day at the most servings: 196 mg.

Zincas Zinc Ascorbate23 mg209%Zinc in Ultimate Ascorbate C 1,000 mg against 13,186 products23 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg23 mg

Higher than 84% of 13,186 products listing zinc (median 11 mg). Per day at the most servings: 46 mg. 1.1 times the adult UL a day.

Copperas Copper SebacateCopper Sebacic Acid Complex500 mcg56%Copper in Ultimate Ascorbate C 1,000 mg against 6,468 products0.5 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg0.5 mg

68% of 6,468 products listing copper give more (median 1 mg). Per day at the most servings: 1 mg.

Manganeseas Manganese AscorbateManganese Ascorbic Acid Complex5 mg217%Manganese in Ultimate Ascorbate C 1,000 mg against 7,016 products5 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg5 mg

Higher than 80% of 7,016 products listing manganese (median 2 mg). Per day at the most servings: 10 mg.

Potassiumas Potassium AscorbatePotassium Ascorbic Acid Complex99 mg2%Potassium in Ultimate Ascorbate C 1,000 mg against 11,614 products99 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg99 mg

49% of 11,614 products listing potassium give more (median 99 mg). Per day at the most servings: 198 mg.

Citrus Bioflavonoid Complex250 mgFlavonoid in Ultimate Ascorbate C 1,000 mg against 2,343 products250 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.250 mg

Higher than 88% of 2,343 products listing flavonoid (median 50 mg). Per day at the most servings: 500 mg.

Hesperidin30 mgHesperidin in Ultimate Ascorbate C 1,000 mg against 552 products30 mg per serving; the middle half of products list 10 mg to 50 mg, the median 20 mg.30 mg

Higher than 61% of 552 products listing hesperidin (median 20 mg). Per day at the most servings: 60 mg.

Rutin30 mgRutin in Ultimate Ascorbate C 1,000 mg against 1,232 products30 mg per serving; the middle half of products list 10 mg to 50 mg, the median 25 mg.30 mg

Higher than 63% of 1,232 products listing rutin (median 25 mg). Per day at the most servings: 60 mg.

Source: NIH ODS Dietary Supplement Label Database, label 272974 (entered September 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:

  • At 2 servings a day, the most its directions give, the label lists 4,000 mg of vitamin C, 2 times the adult Tolerable Upper Intake Level.
  • 96% of the 14,175 products that print an amount of vitamin D list more than its 2 mcg (80 IU) of vitamin D (median 15 mcg (600 IU)).
  • At 2 servings a day, the most its directions give, the label lists 46 mg of zinc, 1.1 times the adult Tolerable Upper Intake Level.

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 Ultimate Ascorbate C 1,000 mg'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
Suggested Use: 2 tablets 1 to 2 times daily; for short term, high potency use, do not exceed 8 tablets daily.
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.

Source: label statements in DSLD label 272974.

What else is on the label?

Other ingredients: Stearic Acid, Microcrystalline Cellulose, Hydroxypropylcellulose, modified Cellulose Gum.

How many labels does Ultimate Ascorbate C 1,000 mg have?

3 labels are on file under this name since September 21, 2017: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 272974 (current) Entered September 22, 2022 · on the market · 100 tablets · UPC 0 21078 00832 3
  2. Label 78725 Entered September 21, 2017 · off the market December 22, 2021 · 100 tablets · UPC 0 21078 00832 3
  3. Label 78719 Entered September 21, 2017 · on the market · 50 tablets · UPC 0 21078 00831 6

DSLD also links this label to: UC-II 40 mg (package size difference, same product), UC-II 40 mg (package size difference, same product), UC-II 40 mg (package size difference, same product).

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?