Processing of fruits results in high amount of waste materials like peels, seeds, stones, oilseed meals etc. It creates problem that is further provoked by legal restrictions. Thus new aspects relating to the use of these wastes as by-products for additional exploitation on the production of food additives with high nutritional value have gained increasing interest since these are high-value products and may be economically attractive.

The by-products are an important source of sugars, minerals, organic acid, dietary fibre and phenolics. The by-products of citrus fruits may contribute to the maintenance of healthy vision. Apples and grapes may also contribute to the maintenance of heart health.