1- sugar: low density sugar, high iron, low calorie. Such as apples, tomatoes, citrus, papaya, cherries, peaches, pears, grapefruit, sugar-free juice and diet coke.
2- protein class: low lipoprotein. Such as low-fat yogurt, skim milk, sugar-free soybean milk, peas, soybeans and so on.
3- Oil: Unsaturated fatty acid. Such as fish oil, olive oil and rapeseed oil.
There are many healthy foods in Keke cuisine. You can go there and have a look.