PlainVitamins

Pure, Buffered Calcium Ascorbate

by NOW · powder · 8 ounces

  • On the market (NIH)
  • UPC 7 33739 00752 0
  • DSLD label 313999
  • Serving 0.25 tsp (approx. 1.12 g)
  • 203 servings

Pure, Buffered Calcium Ascorbate by NOW lists 4 ingredients, 4 with an amount per serving of 0.25 tsp, such as 890 mg of vitamin C and 90 mg of calcium. Its current label entered the NIH Dietary Supplement Label Database on September 25, 2024.

What is in Pure, Buffered Calcium Ascorbate?

Each row as the label prints it, per serving of 0.25 tsp. 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).

Pure, Buffered Calcium Ascorbate: Supplement Facts rows against the market (DSLD label 313999, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin C890 mg989%Vitamin C in Pure, Buffered Calcium Ascorbate against 18,583 products890 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg890 mg

Higher than 91% of 18,583 products listing vitamin C (median 100 mg). Per day at the most servings: 2,670 mg. 1.3 times the adult UL a day.

Calcium Ascorbate1,120 mg
Calciumelemental90 mg7%Calcium in Pure, Buffered Calcium Ascorbate against 17,831 products90 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg90 mg

60% of 17,831 products listing calcium give more (median 115 mg). Per day at the most servings: 270 mg.

Calcium Ascorbate1,120 mg

Source: NIH ODS Dietary Supplement Label Database, label 313999 (entered September 25, 2024), 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 3 servings a day, the most its directions give, the label lists 2,670 mg of vitamin C, 1.3 times the adult Tolerable Upper Intake Level.

The NIH database records 1 to 3 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?

6 products list the very same ingredients; the nearest amounts come first.

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 Usage: Take 1/4 level teaspoon 1 to 3 times daily.
Warnings
Caution: For adults only.
Consult physician if pregnant/nursing, taking medication, or have a medical condition.
Keep out of reach of children.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Allergens and what it does not contain
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients.
Storage
This product is sold by weight not volume. Store in a cool, dry place after opening.

Source: label statements in DSLD label 313999.

What else is on the label?

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Non-GMO; GMP Quality Assured Triangle K (Kosher).

How many labels does Pure, Buffered Calcium Ascorbate have?

3 labels are on file under this name since August 25, 2015: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 313999 (current) Entered September 25, 2024 · on the market · 8 ounces · UPC 7 33739 00752 0
  2. Label 69965 Entered January 25, 2017 · off the market February 12, 2024 · 8 oz. · UPC 7 33739 00752 0
  3. Label 49887 Entered August 25, 2015 · off the market December 5, 2016 · 8 oz. · UPC 7 33739 00752 0

DSLD also links this label to: Calcium Ascorbate (image difference, same product), Calcium Ascorbate (image difference, same product), Calcium Ascorbate (image 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 NOW FOODS (packager), Bloomingdale, IL. All NOW products.

Where next?