String beans are an excellent source of free radical-scavenging vitamins A and C.
They contain bone-building vitamin K and are a good source of energy-producing iron, vitamin B1, and niacin; bone-building calcium, phosphorus, and copper.
They provide muscle-enhancing protein; and anti-inflammatory omega-3 fatty acids and are rich in the mineral silicon which is important for bone heath and healthy formation of connective tissue.
They are also rich in potassium, fibre and antioxidant flavanoids and carotenoids.
