non-nutrient/non-botanical

Flavonoid supplements

Half of the 2,343 flavonoid supplements in the NIH label database that print an amount list 50 mg or less per serving; the middle half list 25 mg to 100 mg (DSLD version 9.4.0, January 2026). The 30 products whose only supplement ingredient is flavonoid list a median of 1,000 mg.

Products listing it: 2,9232,343 print an amount; 579 list it inside a blend without an amount
Median per serving: 50 mgmiddle half 25 mg to 100 mg

How much flavonoid do supplements contain?

The median product lists 50 mg per serving. One in ten lists 10 mg or less, one in ten 250 mg or more. The amount printed most often is 100 mg (372 products).

Products by amount of flavonoid per serving

2,343 products, log scale; extreme 0.2% at each end left out of the drawing.

The amounts printed most often
Amount per serving	Products	For example
100 mg	372	Green Source (Radiance); Ultra Preventive Beta With Copper & Iron (Douglas Laboratories); Ultra Preventive Beta With Copper (Douglas Laboratories)
25 mg	317	Iron Free Daily Multiple 50+ (Sundown Naturals); Mega Vita-Min (Radiance); Men's Multiple (Radiance Select)
50 mg	293	Bilberry Extract Plus (Earth Wise Vitamins & Supplements); Maximum Anti-Oxidant Formula (Radiance); Teen Multiple (FemTeen Symmetry)
20 mg	113	Cell Protector (GNC Preventive Nutrition); Men's (Rexall Sundown Naturalist); Active Woman's Multi (Vitabase)
200 mg	106	Ester-C 500 mg With Citrus Bioflavoinds Timed Release (American Health); Ester-C 1000 mg (Vitabase); Natural Source Super C-1000 With Rose Hips, Citrus Bioflavonoids, Rutin, Hesperidin Complex And Acerola (Windmill)
10 mg	100	Memorall (GNC Preventive Nutrition); Chewable C 500 mg Raspberry-Cherry (VitaCeutical Labs); Malic Acid + Magnesium Tablets (Douglas Laboratories)
60 mg	92	Life Multi Complete (VitaCeutical Labs); Your Life Multi Green Souce (Nature's Bounty); Green Source Multivitamin & Minerals (Vitamin World)
30 mg	91	Mega Vita-Gel (Vitamin World); Mega Vita Gel (Radiance); Mega Multi Vitamin (Indiana Botanic Gardens)
250 mg	73	Ester-C 500 Plus Bioflavonoids (Bluebonnet); Pomegranate Fruit Extract 250 mg (Basic Organics); Flavomax (Shaklee)
500 mg	72	Grape Seed Extract 50 mg (Nature's Bounty); Bio C Complete (VitaCeutical Labs); C Extra 500 mg Plus 500 mg Bioflavonoids (Natural Factors)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most flavonoid?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

Citrus Bioflavonoid Complex 1000 mgVitabase1,000 mg
Citrus Bioflavonoids 1000 mgBronson1,000 mg
Citrus Bioflavonoids Complex 1000 mgMartin Avenue Pharmacy1,000 mg
Citrus Bioflavonoids 1000 mgVitamin World1,000 mg
Flavonoid 1,000DaVinci Laboratories Of Vermont1,000 mg
Citrus Bioflavonoid Complex 1000 mgSolgar1,000 mg
Quiet EarIndiana Botanic Gardens1,000 mg
Bioflavonoids 1,000 mgNature's Life1,000 mg

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 25 mg; those entered in 2025, 75 mg.

Median flavonoid per serving by the year the label entered DSLD (years with 20+ products)
Year	Products	Median per serving
2011	86	25 mg
2012	259	55 mg
2013	236	50 mg
2014	87	50 mg
2015	121	50 mg
2016	146	50 mg
2017	134	50 mg
2018	78	50 mg
2019	70	55 mg
2020	193	50 mg
2021	199	60 mg
2022	151	50 mg
2023	199	37 mg
2024	213	60 mg
2025	171	75 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing flavonoid by DSLD product type

Brands listing it most: Douglas Laboratories (185), Nature's Way (92), Nature's Plus (83), Rainbow Light (43), NOW (38), Country Life (34), VitaCeutical Labs (33), Vitamin World (30), Puritan's Pride (30), Vitamer Laboratories (28).

Every product listing flavonoid

2,923 products, A to Z by name (page 10 of 59), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

C-1000 CapsPhysician's Preference · off the market100 mg
C-1000 Caps With 100 mg BioflavonoidsNOW100 mg
C-1000 Caps With 100 mg Of BioflavonoidsNOW · off the market100 mg
C-1000 Caps With Bioflavonoids & RutinProtocol For Life Balance100 mg
C-1000 ComplexThe Vitamin Shoppe55 mg
C-1000 ComplexBiophix250 mg
C-1000 Complex 1000 mgThe Vitamin Shoppe100 mg
C-1000 mgVitamin World25 mg
C-1000 mgPuritan's Pride25 mg
C-1000 mg & BioflavonoidsBluebonnet500 mg
C-1000 mg plus BioflavonoidsBluebonnet500 mg
C-1000 mg with BioflavonoidsPuritan's Pride15 mg
C-1000 mg With Protective BioflavonoidsVitamin World30 mg
C-1000 mg With Protective Bioflavonoids And Wild Rose HipsVitamin World25 mg
C-1000 Mineral AscorbatesNOW200 mg
C-1000 PlusProgressive Professional from Progressive Laboratories1,000 mg
C-1000 TrMBi Nutraceuticals25 mg
C-1000 With 100 mg Of BioflavonoidsNOW100 mg
C-1000 with Citrus BioflavonoidsPhysioLogics · off the market15 mg
C-1000 with Rose Hips & BioflavonoidsNOW25 mg
C-1500 Complex 1500 mgThe Vitamin Shoppe15 mg
C-2000 Complex 2000 mgThe Vitamin Shoppe160 mg
C-3000 ComplexMBi Nutraceuticals125 mg
C-500 Calcium Ascorbate-CNOW10 mg
C-500 ComplexNOW100 mg
C-500 ComplexThe Vitamin Shoppe139 mg
C-500 Complex 500 mgThe Vitamin Shoppe250 mg
C-500 Complex With Bioflavonoids, Acerola & Rose HipsNOW100 mg
C-500 mgPuritan's Pride25 mg
C-500 mg & BioflavonoidsBluebonnet250 mg
C-500 mg Plus BioflavonoidsBluebonnet · off the market250 mg
C-500 mg Timed ReleasePuritan's Pride25 mg
C-500 mg with Bioflavonoids and Wild Rose HipsPuritan's Pride25 mg
C-500 mg With Protective Bioflavonoids And Wild Rose HipsVitamin World25 mg
C-500 PlusAltrum10 mg
C-500 with Rose Hips and Bioflavonoids Delicious Berry FlavorWindmill Natural Vitamins · off the marketin a blend
C-Ascorbs Sustained ReleaseNaturesPlus400 mg
C-Bioflav 1000NuMedica500 mg
C-Complex 1000 mgGood 'N Natural · off the market100 mg
C-Complex 1000 mgVitamin World100 mg
C-GramsAdvoCare100 mg
C-MaxBio-Tech Pharmacalin a blend
C-PlexKaruna250 mg
C-Plex PowderDouglas Laboratories250 mg
C-Time 1000 Timed ReleasePuritan's Pride25 mg
C.F.S. Support FormulaDouglas Laboratories · off the market100 mg
C.V. Support FormulaDouglas Laboratories75 mg
Cal-AceDouglas Laboratories · off the market150 mg
Calcium BlendSuperNutrition · off the market67 mg
Calcium Blend Iron-FreeSuperNutrition · off the market67 mg