Abstract: This invention provides an efficient and feasible method, system and computer program for retrieving total nutrition facts from purchase transaction information including receipt images and other complementary data. The said facts are used to build up the nutrition intake history, provide nutrition intake reports and customized nutrition suggestions based on the users' personal health related information and nutrition intake data. The method initiates from receiving information on a transaction in the format of an image of a receipt, or other itemized input. If the input is a receipt image, an automatic process including image processing, machine learning and text extraction is applied to retrieve the purchased items and quantity, from which total nutrition facts are derived using the nutrition information of each purchased item found in public, or in private and undisclosed vendor and distributor databases that are reconstructed in a preferred embodiment.