Pistachios are unique in the nut family in that they contain nutrients called carotenoids. Dietary carotenoids provide health benefits to the body. They decrease the risk of disease, particularly certain cancers and eye disease. These compounds are found in the cornea and retina of the eyes, and it's believed that incorporating these into your diet can provide your body with essential nutrients to rebuild damaged cells in the eyes. Higher levels of carotenoids may also help reduce the risk of degenerative eye diseases, such as cataracts and macular degeneration. The antioxidants found in pistachios may also play a role in the healthy regrowth of optical cells.

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