Water-soluble heme-polypeptide composite nutritional iron enhancer and preparation method thereof

The invention discloses a water-soluble heme-polypeptide composite nutritional iron enhancer and a preparation method thereof, and belongs to the field of food processing. The preparation method comprises the following steps: carrying out acid hydrolysis on porcine hemoglobin, adjusting the pH value, washing, drying and precipitating to obtain porcine heme powder, dissolving the porcine heme powder with a sodium carbonate solution, mixing with a whey protein solution, adjusting the pH value of the mixed solution to be neutral, centrifuging or filtering to remove a small amount of insoluble parts, and drying to obtain the porcine heme powder. And freeze-drying or spray-drying to prepare powder to obtain the water-soluble heme-polypeptide composite nutrient iron enhancer. The fortifier can well supplement the iron element required by the human body, the whey protein has the physiological functions of regulating immunity, regulating lactose absorption and the like, and the water-soluble heme-polypeptide composit