A method for the preparation of a food grade coagulated potato protein concentrate is disclosed, wherein it comprises the steps of a) separating fibers and starch from a potato pulp, wherein a potato fruit juice containing potato protein is obtained, b) coagulating the potato protein in the potato fruit juice by adjusting the pH to an acidic value and by heating, wherein a coagulated potato protein slurry containing particles of coagulated potato protein is obtained, c) reducing the total glycoalkaloid content in the coagulated potato protein slurry to less than 150 mg/kg protein concentrate, and d) actively reducing the particle size of the of potato protein particles by physical means in such a way that a coagulated potato protein concentrate is obtained in which 90 % of said particles have a particle size of less than 55µm, as well as a food grade coagulated potato protein concentrate produced with said method, use of the food grade coagulated potato protein concentrate in a food product, and a food product for human use comprising said food grade coagulated potato protein product.
