In one embodiment, this invention utilizes radio frequency identification (RFID) tag with nutrition information for each kind of food in a restaurant, institutional cafeteria, in food delivery to hospital patients, in hospice, in old age home residents or elsewhere. The food plate is placed on a coaster with an RFID reader and miniature built-in scale. The scale is used to measure the weight of a particular food placed on the plate. In addition, the RFID reader reads the nutritional information from an RFID tag in the serving bin of the cafeteria or the food distribution point. With the nutritional information of each food and the amount of the food that is added to the plate, the nutritional intake of a customer or patient can be calculated. With this the nutrition information now available, the nutritional information, including the amount of vitamins, calories, sugars, carbohydrates, and grams (g) of fat, can be obtained and tracked.