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.

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).

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.

In which products and brands?

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 41 of 59), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Pro-Equalizer Protein CapsulesDouglas Laboratories · off the marketin a blend
• Pro-Equalizer Protein PowderDouglas Laboratoriesin a blend
• Probiotic Defense+ Natural Citrus Punch FlavorNatrol0.025 mg
• ProFemaPure Essence400 mg
• ProGI Soothe French VanillaNuMedica · off the market250 mg
• ProGI Soothe Vanilla FlavorNuMedica250 mg
• ProJoba Super DailyProJoba International75 mg
• Prolonged Release Iron Free Ultimate OneVitamer Laboratories · off the market58 mg
• ProMulti-PlusBiotics Research Corporation20 mg
• Propolis Raw ResinBee Magicin a blend
• Prosta-Pro Support PackDouglas Laboratories50 mg
• Prosta-Support FormulaDouglas Laboratories100 mg
• ProstaCaidecoNugenicsin a blend
• Prostate HealthNutrilite33.3 mg
• Protease IFCTransFormation Professional Protocolin a blend
• Proteo PlusNutura300 mg
• Proteozyme ForteDouglas Laboratories125 mg
• ProtoSorb C 500Protocol For Life Balance100 mg
• Provex-PlusMelaleuca100 mg
• Provex-PlusVitality For Lifein a blend
• Pure Adrenal SupportShape by HIT Nutrition · off the market225 mg
• Pure Way C 500 mg with 100 mg BioflavonoidsRon Teeguarden Nutraceuticals100 mg
• Pure-C Bio 600Maxi Health600 mg
• Pure-C-Bio CapsulesMaxi Health400 mg
• PurePals (with Iron) Natural Cherry FlavorPure Encapsulations5 mg
• PurePals Natural Cherry FlavorPure Encapsulations5 mg
• PureWay-CSwanson Ultra · off the market100 mg
• PureWay-C 1,000 mgVitamin Discount Center · off the market100 mg
• PureWay-C 1,000 mg Vitamin C with BioflavonoidsSwanson Ultra · off the market200 mg
• PureWay-C 1000 mg Caps with 100 mg BioflavonoidsNewflower Farmers Markets100 mg
• PureWay-C 500 mgVitamin Discount Center · off the market200 mg
• PureWay-C 500 mg with 200 mg BioflavonoidsNewflower Farmers Markets200 mg
• PureWay-C Capsules 500 mgVitamin Discount Center · off the market100 mg
• PureWay-C Sustained Release Vit. CDoctor's Best · off the market50 mg
• PurWay-CVitabase100 mg
• PycnogenolNOW600 mg
• Pycnogenol 30 mgNature's Bounty300 mg
• Pycnogenol 30 mgNOW600 mg
• Pycnogenol 30 mg With 300 mg BioflavonoidsNOW · off the market600 mg
• Pycnogenol 60 mgVitamin World300 mg
• Pycnogenol OPC Complex 300 mgPatient One 1 MediNutritionals50 mg
• Pycnogenol SupremeSource Naturals50 mg
• Pyruvate - F.R.I.Douglas Laboratoriesin a blend
• QuercetinNatrol · off the market66 mg
• Quercetin 250 mgNatrol · off the market100 mg
• Quercetin 250 mgBIOVEA25 mg
• Quercetin 500 mgNatrol · off the market100 mg
• Quercetin 500 PlusVitabase100 mg
• Quercetin 500 PlusNewflower Farmers Markets100 mg
• Quercetin 500 PlusVitamin Discount Center · off the market100 mg

Where next?

• Check an amount of flavonoid
• Labels above the upper limit
• All ingredients