Method for obtaining antioxidants, diet fiber, and other nutrients from plant by-products

A method for obtaining nutraceutical products rich in antioxidants and dietary fiber from apples, pears, and blackberry by-products, comprising the steps of:

• i. crushing about 10 Kg to 20 Kg of apple by-products, about 3.5 Kg to 7.0 Kg of pear by-products, and about 1.5 Kg to 3.0 Kg of blackberry by-products, thus obtaining a first mixture of a first solid phase and a first liquid phase;
• ii. separating said first liquid phase and said first solid phases of said first mixture, preserving the first liquid phase for its ulterior use;
• iii. carrying out only one step of fermentation with a yeast on said first solid phase under anaerobic conditions to achieve about 2°Brix, thereby obtaining a fermented first solid phase;
• iv. stopping the fermentation by adding a yeast inhibitor to the fermented first solid phase, and mixing, thereby forming a second mixture of a second solid phase and a second liquid phase;
• and
• v. separating said second solid phase and said second liquid phases of said second mixture and recovering said second solid phase and said second liquid phase separately, said recovered second solid phase and said recovered second liquid phase comprising said nutraceutical products rich in antioxidants and dietary fiber.