Ester-C Bio
by Klaire Labs · capsule · 100 vegetarian capsules
- Off the market since February 2025 (NIH)
- UPC 8 28054 00215 9
- DSLD label 264871
- Serving 1 capsule
- 100 servings
Ester-C Bio by Klaire Labs lists 3 ingredients, 3 with an amount per serving of 1 capsule, such as 50 mg of citrus bioflavonoids, 75 mg of rutin and 3 mg of pycnogenol. Its current label entered the NIH Dietary Supplement Label Database on July 21, 2022.
What is in Ester-C Bio?
Each row as the label prints it, per serving of 1 capsule. 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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Ester-Cas Vitamin C | 540 mg | 600% | |
| Ester-Cas Calcium | 60 mg | 5% | |
| Citrus Bioflavonoidsas Citrus aurantium, Citrus aurantium | 50 mg | 46% of 2,343 products listing flavonoid give more (median 50 mg). Per day at the most servings: 100 mg. | |
| Rutinas Japanese Pagoda Tree Bud Extract | 75 mg | Higher than 82% of 1,232 products listing rutin (median 25 mg). Per day at the most servings: 150 mg. | |
| Pycnogenolas French Maritime Pine Bark Extract | 3 mg | 89% of 215 products listing maritime pine give more (median 50 mg). Per day at the most servings: 6 mg. |
Source: NIH ODS Dietary Supplement Label Database, label 264871 (entered July 21, 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:
- 89% of the 215 products that print an amount of maritime pine list more than its 3 mg of pycnogenol (filed by NIH under maritime pine) (median 50 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 Ester-C Bio's, rare ingredients counting for more.
- Pycnogenol 30 mgNature's Bounty 2 shared, 69% alike
- Pycnogenol 30 mg With 300 mg BioflavonoidsNOW · off the market 2 shared, 69% alike
- Pycnogenol 60 mgVitamin World 2 shared, 69% alike
- Ultimate Pycnogenol ComplexNatural Goal · off the market 2 shared, 69% alike
- Pycnogenol 30 mgNOW 2 shared, 69% alike
- PycnogenolNOW 2 shared, 69% alike
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: 1 capsule, 1 to 2 times daily with food or as directed by a healthcare professional.
- Warnings
- Do not use if shrinkwrap is broken or missing.
- Caution: If you are pregnant, nursing, have a medical condition, or taking prescription drugs, consult your physician before using this product.
- Keep out of reach of children.
- Allergens and what it does not contain
- Free of the following common allergens: Milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, and soybeans. Contains no artificial colors, flavors, or preservatives.
- Storage
- Store in a cool, dry place (59 degrees F - 85 degrees F) away from direct light.
Source: label statements in DSLD label 264871.
What else is on the label?
Other ingredients: Vegetarian Capsule, Stearic Acid, Microcrystalline Cellulose, Silicon Dioxide.
How many labels does Ester-C Bio have?
One label is on file, entered on July 21, 2022.
- Label 264871 (current) Entered July 21, 2022 · off the market February 18, 2025 · 100 vegetarian capsules · UPC 8 28054 00215 9
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names SFI USA (manufacturer), Reno, NV. All Klaire Labs products.