Vitamin C 500 mg Plus Grape Seed
by Quest · tablet or pill · 90 tablets
- Off the market since October 2023 (NIH)
- UPC 0 58371 21273 7
- DSLD label 23665
- Serving 1 tablet
Vitamin C 500 mg Plus Grape Seed by Quest lists 4 ingredients, 4 with an amount per serving of 1 tablet, such as 500 mg of vitamin C, 50 mg of citrus bioflavonoids, 16.7 mg of grape seed (vitis vinifera) 60:1 extract and 5 mg of quercetin. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2013.
What is in Vitamin C 500 mg Plus Grape Seed?
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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin Cas Calcium Ascorbate | 500 mg | 556%* | Higher than 81% of 18,583 products listing vitamin C (median 100 mg). |
| Citrus Bioflavonoids | 50 mg | 46% of 2,343 products listing flavonoid give more (median 50 mg). | |
| Grape seed (Vitis vinifera) 60:1 extractGrape seed (Vitis vinifera) 60:1 extract PlantPart: seed Genus: Vitis Species: vinifera Note: equiv. to 1000 mg grape seed | 16.7 mg | 84% of 1,900 products listing grape give more (median 50 mg). | |
| Quercetinas Apple | 5 mg | 95% of 1,548 products listing quercetin give more (median 100 mg). |
* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.
Source: NIH ODS Dietary Supplement Label Database, label 23665 (entered July 25, 2013), version 9.4.0. See the label on DSLD. 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:
- 95% of the 1,548 products that print an amount of quercetin list more than its 5 mg of quercetin (median 100 mg).
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?
The products whose ingredient lists overlap most with Vitamin C 500 mg Plus Grape Seed's, rare ingredients counting for more.
- Quercetin 250 mgBIOVEA 3 shared, 74% alike
- Super Vitamin CNature's Lab 3 shared, 74% alike
- Quercetin ComplexNatrol 3 shared, 74% alike
- Quercetin with Citrus BioflavonoidsNATURELO Premium Supplements 3 shared, 74% alike
- Resveratrol Red Wine ComplexWonder Laboratories 3 shared, 69% alike
- Vitamin C with QuercetinIntegrative Therapeutics 3 shared, 65% 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
- Recommended Use: A factor in the normal development and maintenance of bones, cartilage, teeth and gums. An antioxidant for the maintenance of good health. Recommended Dose (Adults): Take 1 tablet daily with a meal, or as directed by a health care practitioner. Consult a health care practitioner for use beyond 12 weeks.
- Warnings
- KEEP OUT OF REACH OF CHILDREN.
- SEALED FOR FRESHNESS AND POTENCY. DO NOT USE IF SEAL UNDER CAP IS BROKEN.
- Risk Information: Do not use if you are pregnant or breastfeeding.
- Allergens and what it does not contain
- This product does not contain corn, dairy, egg, gluten, shellfish, soy, sulfites, or animal derivatives.
- No artificial colours, flavours or preservatives
- Storage
- STORE IN A COOL, DRY PLACE.
Source: label statements in DSLD label 23665.
What else is on the label?
Other ingredients: Croscarmellose Sodium, Magnesium Stearate, Cellulose, Glycerin, Hypromellose.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): PREMIUM - QUALITY ASSURED; {Recycle}; SunOpta A healthy products company.
How many labels does Vitamin C 500 mg Plus Grape Seed have?
One label is on file, entered on July 25, 2013.
- Label 23665 (current) Entered July 25, 2013 · off the market October 12, 2023 · 90 tablets · UPC 0 58371 21273 7
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names SunOpta Inc. (manufacturer), Acton, ON. All Quest products.