Quercetin inhibits the aldose reductase enzyme, which converts glucose into sorbitol. Sorbitol build up in the lens
of the eye (secondary to diabetes and hyperglycemia) is involved in the development of cataracts.
Elevated sorbitol may also contribute to the development of diabetic neuropathy and retinopathy. Thus, Quercetin
may be beneficial in diabetes management for a number of reasons.13,14 Animal studies reveal that Quercetin
ef ectively delays the onset of cataracts in diabetic animals.14