Summer suitable for middle-aged and elderly people what are the agricultural by-products

Cauliflower, lettuce and so on. Summer suitable for middle-aged and elderly agricultural by-products are cauliflower, lettuce, etc., cauliflower, is a common summer vegetable, nutritional value is also very high, which a variety of vitamins, minerals, dietary fiber, etc., often eat to promote appetite, digestive, enhance immunity. Lettuce is very refreshing, vitamins, trace elements, dietary fiber, etc., are also very rich, but also has a high content of folic acid, also known as the "gold dish", high nutrition.