Cataracts, a leading cause of blindness, occur when the eye’s clear lens becomes cloudy due to free radical damage. Curcumin, the main compound in turmeric, is a natural antioxidant that can neutralize free radicals and reduce their harm. A systematic review published in the European Journal of Integrative Medicine evaluated whether curcumin could prevent or treat cataracts.

The researchers analyzed 17 animal and/or lab-grown cell studies, demonstrating that curcumin prevented or slowed cataract formation by reducing damage to fats in cells and boosting antioxidant enzymes that protect the eye.

Despite these findings, the researchers noted that human clinical trials are needed to confirm these benefits before curcumin can be recommended as a treatment. Additionally, improving curcumin’s absorption, or bioavailability, is crucial to make it effective as medicine.