Green beans are available fresh all year long, so you can enjoy this Green Bean Salad all year long!   And once you hear how good they are for you; you will want to eat them ALL YEAR LONG. A one cup serving of green beans has 30 calories and 3.4 grams of fiber! They also contain anti-oxidants also known as catechins.  These catechins are known to improve heart health and help prevent cancer and help manage/prevent diabetes. Green beans are a good source of potassium, and folate, and are an excellent source of protein, iron, and zinc. If you are looking to boost your immune system look no further, green beans are a great source of vitamin C.