Some foods naturally contain disease-fighting, health promoting properties, while others contain elements that may hinder your health goals.
Fennel
Fennel contains the antioxidant flavonoid quercetin. This herb is anticarcinogenic and can be useful for cancer patients undergoing chemotherapy or radiation. Fennel can be useful for indigestion and spasms of the digestive tract. It also helps 
expel phlegm from the lungs.
Kohlrabi
Kohlrabi, which belongs to the cabbage family, is an excellent source of vitamin C and potassium and is high in fiber. Kohlrabi helps to stabilize blood sugar and is therefore useful hypoglycemia and diabetes. It can also be effective against edema, candida and viral conditions.
Jicama
Jicama is low in sodium and high in potassium. It has a slightly sweet flesh that's on the order of water chestnuts, but crunchier. Due to their high carbohydrate content, they should be used sparingly.
Kale
Kale eases lung congestion and is beneficial to the stomach, liver and immune system. It contains lutein and zeaxanthin, which protect the eyes from macular degeneration. It also contains indole-3-carbinol, which may protect against colon cancer. Kale is an excellent source of calcium, iron, vitamins A and C, and chlorophyll.
Green Beans
Fresh beans contain vitamin A, B-complex vitamins, calcium and potassium. Green beans are diuretic and may be used to treat diabetes. A fresh bean should snap crisply and feels velvety to the touch.
