PlainVitamins

Ultimate Ascorbate C Powder

by Source Naturals · powder · 4 ounces

  • On the market (NIH)
  • UPC 0 21078 00090 7
  • DSLD label 296328
  • Serving 1.35 g (1/4 heaping Teaspoon)
  • 84 servings

Ultimate Ascorbate C Powder by Source Naturals lists 6 ingredients, 6 with an amount per serving of 1.35 g, such as 1,000 mg of vitamin C, 34 mg of calcium, 32 mg of magnesium and 3 mg of zinc, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on September 25, 2023.

What is in Ultimate Ascorbate C Powder?

Each row as the label prints it, per serving of 1.35 g. 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 Powder: Supplement Facts rows against the market (DSLD label 296328, January 2026 release)
IngredientAmount% DVAmong products listing it
Total Carbohydrates1 g1%Carbohydrate in Ultimate Ascorbate C Powder 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 Cas Calcium Ascorbate, Magnesium Ascorbate, Manganese Ascorbate1,000 mg1,670%Vitamin C in Ultimate Ascorbate C Powder 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 Ascorbate34 mg3%Calcium in Ultimate Ascorbate C Powder against 17,831 products34 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg34 mg

83% of 17,831 products listing calcium give more (median 115 mg).

Magnesiumas Magnesium Ascorbate32 mg8%Magnesium in Ultimate Ascorbate C Powder against 14,003 products32 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg32 mg

74% of 14,003 products listing magnesium give more (median 86 mg).

Zincas Zinc Ascorbate3 mg20%Zinc in Ultimate Ascorbate C Powder against 13,186 products3 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg3 mg

84% of 13,186 products listing zinc give more (median 11 mg).

Manganeseas Manganese Ascorbate1 mg50%Manganese in Ultimate Ascorbate C Powder against 7,016 products1 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg1 mg

70% of 7,016 products listing manganese give more (median 2 mg).

Potassiumas Potassium Ascorbate86 mg2%Potassium in Ultimate Ascorbate C Powder against 11,614 products86 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg86 mg

57% of 11,614 products listing potassium give more (median 99 mg).

Source: NIH ODS Dietary Supplement Label Database, label 296328 (entered September 25, 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.

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 heaping 1/4 measuring teaspoon mixed in water or juice as desired, preferably with a meal.
Warnings
Note: If you are pregnant, may become pregnant, or breastfeeding, consult with 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
Suitable for Vegetarians and Hypoallergenic: Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

Source: label statements in DSLD label 296328.

How many labels does Ultimate Ascorbate C Powder have?

4 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 296328 (current) Entered September 25, 2023 · on the market · 4 ounces · UPC 0 21078 00090 7
  2. Label 78615 Entered September 21, 2017 · on the market · 16 ozs · UPC 0 21078 00092 1
  3. Label 78614 Entered September 21, 2017 · on the market · 8 ozs · UPC 0 21078 00091 4
  4. Label 78612 Entered September 21, 2017 · off the market July 6, 2022 · 4 ozs · UPC 0 21078 00090 7

DSLD also links this label to: Ultra Bone Balance (package size difference, same product), Ultra Bone Balance (package size difference, same product), Ultra Bone Balance (package size difference, same product), Ultra Bone Balance (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?