Flavonoids
by Intensive Nutrition · capsule · 100 vegetarian capsules
- Off the market since October 2023 (NIH)
- DSLD label 23666
- Serving 1 to 6 capsules; amounts per 1 capsule
Flavonoids by Intensive Nutrition lists 2 ingredients, 2 with an amount per serving of 1 capsule, such as 39 mg of total bioflavonoids and 95 mg of quercetin. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2013.
What is in Flavonoids?
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 |
|---|---|---|---|
| Total Bioflavonoidsas Enocitrin, Flavonols, Flavonones | 39 mg | 60% of 2,343 products listing flavonoid give more (median 50 mg). | |
| Quercetin | 95 mg | 51% of 1,548 products listing quercetin give more (median 100 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 23666 (entered August 23, 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?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
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 Flavonoids's, rare ingredients counting for more.
- Quercetin 250 mgBIOVEA 2 shared, 81% alike
- Super Vitamin CNature's Lab 2 shared, 81% alike
- Quercetin ComplexNatrol 2 shared, 81% alike
- Quercetin with Citrus BioflavonoidsNATURELO Premium Supplements 2 shared, 81% alike
- Vitamin C with QuercetinIntegrative Therapeutics 2 shared, 69% alike
- Bioflavonoid ComplexKlaire Labs 2 shared, 64% 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
- Directions: 1 - 6 capsules with meals or as directed by your health professional.
- Warnings
- Caution: Keep the bottle closed in a cool, dry place and out of the reach of children.
- Allergens and what it does not contain
- FREE OF YEAST, SUGAR, STARCH, EGG, GLUTEN, CORN, MILK, ARTIFICIAL COLORS, SWEETENERS OR PRESERVATIVES.
Source: label statements in DSLD label 23666.
What else is on the label?
Other ingredients: Magnesium Stearate, Orisil.
How many labels does Flavonoids have?
One label is on file, entered on August 23, 2013.
- Label 23666 (current) Entered August 23, 2013 · off the market October 4, 2023 · 100 vegetarian capsules
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Intensive Nutrition Inc. (manufacturer), San Leandro, CA. All Intensive Nutrition products.