Cocoa shells are just one of the examples of by-products with high-value bioactive components and interesting nutritional value that have been discarded, although they could be re-used in many ways.
Considering the growing world population and disappearing raw materials, and a real threat of reduced food sources, it is not surprising that awareness about the needs of preservation and re-usage of materials that are treated as a waste is rising. Today, there are huge quantities of by-products that are discarded, causing enormous economic problems by polluting the environment.
Food industry waste often consists of inedible parts, so-called by-products.
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