| Therapeutic Dosages | Therapeutic Uses | Safety Issues
Quercetin belongs to a class of water-soluble plant coloring
substances called Bioflavonoids have strong effects when they
are studied in the test tube, and this is the basis for some of
the health claims attached to them. However, growing evidence
suggests that bioflavonoids do not in fact act as antioxidants
in human beings. Nonetheless, as widely available plant
substances, they are considered possible semi-nutrients,
substances that are not essential for life but might help
promote optimal health. Quercetin is not an essential nutrient.
It is found in red wine, grapefruit, onions, apples, black tea,
and, in lesser amounts, in leafy green vegetables and beans.
However, to get a therapeutic dosage, you'll have to take a
supplement. Quercetin supplements are available in pill and
tablet form. A typical dosage is 200 to 400 mg 3 times daily. A
special type of quercetin, quercetin chalcone, is claimed to be
absorbed better, but there is little reliable e