Fiber is anything but valueless - it does good to you when dieting, lowers both the cholesterol and the blood sugar, and decreases the risk of cancer, heart diseases, diabetes and many inflammations. Also, it absorbs sugars and fats while slowing down the food digestion.

Neutral is each food that combines pretty well with all other types of products, such as non-starchy vegetables with the exception of green peas, rice, soya, potatoes, white and broad beans, lentil plus all kinds of vegetable oils, mushrooms, sprouts and others. 

Carbs percentage in several foods per 100 g.

List of protein-rich foods and protein content per 100 g.