string beans
string beanscontain pigments that give vegetables their red, yellow and orange colors, called carotenoids, all function as antioxidants. String beans contain three carotenoids: beta-carotene, lutein and zeaxanthin. Beta-carotene is converted into retinol, which is the form of vitamin A essential for normal night vision. Lutein and zeaxanthin absorb blue light, … Read More