Bioflavonoids
Flavonoids: hesperidin, rutin, quercetin and related polyphenols
Vitaminoid and related nutrients
Aliases / common names
Vitamin P (obsolete); citrus bioflavonoids; rutin; hesperidin; quercetin
Natural food sources
Citrus peel/pith, berries, apples, onions, tea, cocoa, buckwheat and colorful plants.
Main wellness functions
Polyphenol antioxidant support; often paired with vitamin C for capillary and vascular wellness wording.
Deficiency signs
No established deficiency disease in humans.
Recommended intake
No official RDA/AI has been established. Follow product labels and professional advice when used for specific goals.
Excess intake effects
High intakes may cause headache, tingling, stomach upset or interact with drug metabolism depending on compound.
Contraindicated / caution groups
Use caution with anticoagulants, antiplatelet medicines, chemotherapy or drugs with narrow therapeutic windows.
Common dosage forms
Capsules, tablets, powders; citrus bioflavonoid complexes, rutin, hesperidin, quercetin.
Common product strengths
Citrus bioflavonoids 100-1,000 mg; quercetin 250-500 mg; rutin 250-500 mg.
Use precautions
Separate from medicines if advised; choose standardized extracts when possible.
Supplement notes
Former “vitamin P” terminology is historical and should not imply essential-vitamin status.
This information is for general nutrition education and product reference only. It does not replace medical diagnosis, treatment or individualized dietary advice.