PlainVitamins

Ester-C

by Kala Health · tablet or pill · 60 tablets

  • On the market (NIH)
  • UPC 8 719322 754523
  • DSLD label 311297
  • Serving 1 tablet
  • 60 servings

Ester-C by Kala Health lists 3 ingredients, 3 with an amount per serving of 1 tablet, such as 790 mg of ascorbic acid, 90 mg of calcium and 100 mg of citrus bioflavonoids. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2024.

What is in Ester-C?

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).

Ester-C: Supplement Facts rows against the market (DSLD label 311297, January 2026 release)
IngredientAmount% DVAmong products listing it
Ester-Cas Calcium Ascorbatemetabolites1,000 mg
Ascorbic Acidas Vitamin C790 mg990%Vitamin C in Ester-C against 18,583 products790 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg790 mg

Higher than 90% of 18,583 products listing vitamin C (median 100 mg).

Calciumas Calcium Ascorbate90 mg11%Calcium in Ester-C 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).

Citrus Bioflavonoids100 mgFlavonoid in Ester-C against 2,343 products100 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.100 mg

Higher than 62% of 2,343 products listing flavonoid (median 50 mg).

Source: NIH ODS Dietary Supplement Label Database, label 311297 (entered July 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:

  • Its 790 mg of ascorbic acid (filed by NIH under vitamin C) is higher than 90% of the 18,583 vitamin C products that print an amount; 1,793 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.

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
Recommended dosage: Adults take one tablet per day, or as recommended. For children adapt dosage according to body weight. Best taken with meals. Do not exceed the recommended dosage. Do not take if product has expired.
Warnings
Do not exceed the recommended dosage. Do not take if product has expired.
Storage: Store in a cool, dark, dry place, out of reach of children.
A food supplement should not be used as a substitute for a varied diet.
Allergens and what it does not contain
Free of: Sugar, yeast, starch, gluten, artificial flavors, colors or preservatives.

Source: label statements in DSLD label 311297.

What else is on the label?

Other ingredients: Vitamin C, Microcrystalline Cellulose, Rice Extract, Rice Concentrate, Hydroxypropyl Methylcellulose, Stearic Acid, Glycerin, Carnauba Wax.

How many labels does Ester-C have?

One label is on file, entered on July 25, 2024.

  1. Label 311297 (current) Entered July 25, 2024 · on the market · 60 tablets · UPC 8 719322 754523

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

Who makes it?

The label names Kala Health BV- NL (manufacturer). All Kala Health products.

Where next?