Green beans are an important source of both carotenoids and flavonoids. Green bean carotenoids include lutein, beta-carotene, violaxanthin, and neoxanthin. Green bean flavonoids include quercetin, kaemferol, catechins, epicatechins, and procyanidins Green beans are an excellent source of free radical-scavenging vitamin C and manganese, and bone-building vitamin K.
They are also a very good source of immune-supportive, vitamin A; heart-healthy dietary fiber, potassium, and folate; and energy-producing iron. In addition, green beans are a good source of bone-building magnesium, calcium, phosphorus, and copper; energy-producing thiamin, riboflavin, and niacin; muscle-enhancing protein; and anti-inflammatory omega-3 fatty acids. Green beans have also been shown to contain valuable amounts of the mineral silicon, and in a form that makes it easier for us to absorb this bone-supportive and connective tissue-supportive nutrient.