Fast-C With Dihydroquercetin
by Life Extension · tablet or pill · 120 vegetarian tablets
- On the market (NIH)
- UPC 7 37870 17171 3
- DSLD label 58930
- Serving 1 vegetarian tablet
Fast-C With Dihydroquercetin by Life Extension lists 5 ingredients, 5 with an amount per serving of 1 vegetarian tablet, such as 500 mg of vitamin C, 79 mg of calcium, 8 mg of magnesium and 3 mg of bioperine piperine. Its current label entered the NIH Dietary Supplement Label Database on April 22, 2016.
What is in Fast-C With Dihydroquercetin?
Each row as the label prints it, per serving of 1 vegetarian 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 Ascorbic Acid | 500 mg | 833% | Higher than 81% of 18,583 products listing vitamin C (median 100 mg). Per day at the most servings: 1,000 mg. |
| Calciumas Calcium CarbonateCalcium (Form: as Calcium Carbonate) | 79 mg | 8% | 64% of 17,831 products listing calcium give more (median 115 mg). Per day at the most servings: 158 mg. |
| Magnesiumas Magnesium HydroxideMagnesium (Form: as Magnesium Hydroxide) | 8 mg | 2% | 94% of 14,003 products listing magnesium give more (median 86 mg). Per day at the most servings: 16 mg. |
| Bioperine Piperineas Black Pepper extractBioperine Piperine (Form: from Black Pepper extract PlantPart: fruit) | 3 mg | 82% of 203 products listing piperine give more (median 5 mg). Per day at the most servings: 6 mg. | |
| Total Dihydroquercetinsas Grape extractTotal Dihydroquercetins (Form: from Grape extract PlantPart: leaf) | 25 mg |
Source: NIH ODS Dietary Supplement Label Database, label 58930 (entered April 22, 2016), 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:
- 94% of the 14,003 products that print an amount of magnesium list more than its 8 mg of magnesium (median 86 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 Fast-C With Dihydroquercetin's, rare ingredients counting for more.
- Vitamin C with Dihydroquercetin 1000 mgLife Extension 2 shared, 52% alike
- Taxifolin Complex SREndurance Products Company 2 shared, 47% alike
- Taxifolin 10 mgSuperSmart · off the market 1 shared, 43% alike
- Taxifolin 60 mgSuperSmart 1 shared, 43% alike
- Fast-C and Bio-Quercetin PhytosomeLife Extension 4 shared, 40% 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
- Read the entire label and follow the directions carefully prior to use. DIRECTIONS: Take one (1) tablet once or twice daily with or without food, or as recommended by a healthcare practitioner.
- Warnings
- CAUTION: Do not take more than 15 mg per day of Bioperine.
- WARNINGS: ~ KEEP OUT OF REACH OF CHILDREN.
- ~ DO NOT EXCEED RECOMMENDED DOSE. ~ Do not purchase if outer seal is broken or damaged.
- ~When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
- Allergens and what it does not contain
- Non-GMO
- Storage
- Store tightly closed in a cool, dry place.
Source: label statements in DSLD label 58930.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Aqueous Film Coating, Stearic Acid, Croscarmellose Sodium, Vegetable Stearate.
How many labels does Fast-C With Dihydroquercetin have?
2 labels are on file under this name since April 22, 2016: other sizes, label designs and reformulations. The current one leads this page.
- Label 58930 (current) Entered April 22, 2016 · on the market · 120 vegetarian tablets · UPC 7 37870 17171 3
- Label 58928 Entered April 22, 2016 · off the market April 1, 2016 · 120 vegetarian tablets · UPC 7 37870 17171 3
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Quality Supplements and Vitamins, Inc. (distributor), Ft. Lauderdale, FL. All Life Extension products.