Purple beans can be found in all common bean growing regions, thriving in the long warm days of the summer months throughout temperate regions of the Americas, Asia and Europe. These gorgeous beans are a treat for the palate and a reminder of what a classic green bean should taste like. When it comes to their nutritional profile, there are only about 44 calories in an entire cup of them, not to mention that they are a great source of vitamin C, vitamin K, vitamin A, manganese, potassium and iron. These beans also contain high levels of riboflavin, calcium, phosphorus, omega-3 fatty acids and niacin. As a matter of fact, it has been said that this vegetable is good for colon health because of the beta-carotene and vitamin C it contains. On a side note, Baby Purple French bean's pods lose their intense color during cooking.