1. Modified food product or food product containing edible polymer hydrogel. 2. A modified food product or food product according to claim 1, characterized in that said edible polymer hydrogel has a swelling coefficient of 40 or more. A modified food product or food product according to claim 1, characterized in that said edible polymer hydrogel has a swelling coefficient of 80 or more. A modified food product or food product according to claim 1, characterized in that said edible polymer hydrogel has an elastic modulus of at least 200 Pa. 5. A modified food product or food product according to claim 1, characterized in that said edible polymer hydrogel has a viscosity of at least 15 s. 6. A modified food product or food product according to claim 1, characterized in that the food product or food product contains carbohydrates, and said edible polymer hydrogel replaces at least a portion of the carbohydrate content with respect to the corresponding ordinary food product or food product. A modified food product or food product according to claim 6, characterized in that said food product or food product contains carbohydrates from grain, cereals or starchy vegetables. Modified flour containing an edible polymer hydrogel selected from edible polymer hydrogels formed by crosslinking a hydrophilic polymer with polycarboxylic acid and edible polymer hydrogels. 9. Modified flour according to claim 8, characterized in that1. Модифицированный пищевой продукт или продукт питания, содержащий пригодный в пищу полимерный гидрогель.2. Модифицированный пищевой продукт или продукт питания по п. 1, отличающийся тем, что указанный пригодный в пищу полимерный гидрогель имеет коэффициент набухания 40 или больше.3. Модифицированный пищевой продукт или продукт питания по п. 1, отличающийся тем, что указанный пригодный в пищу полимерный гидрогель имеет коэффициент набухания 80 или больше.4. Модифицированный пищевой продукт или продукт питания по п. 1, отличающийся тем, что указанный приг
