DESCRIPTION/FUNCTION

• Quercetin is classified as a bioflavonoid. It can be formed from rutin when the carbohydrate component of rutin (rutinose) is removed.

DRI (RDA or AI for Adults)

• None.

MAJOR SOURCES

• Apples, berries, broccoli, grapes (purple and red), onions, red wine, tea (black and green).

MAINTENANCE/THERAPEUTIC RANGE

• 100 mg to 1,500 mg.

POSSIBLE THERAPEUTIC APPLICATIONS

• Allergies
• Bruising
• Cancer (many kinds)
• Cataracts
• Coronary heart disease
• Diabetes (neuropathy, retinopathy)
• Inflammation
• Prostatitis

COMMENTS

• Quercetin is not soluble in water. Combining with bromelain, an enzyme from pineapples, may increase its absorption. Rutin is more soluble.

CAUTIONS

• None significant.