A pacifier is presented including a nipple configured to receive a plurality of breath and saliva samples from a user, a base portion configured for attachment to the nipple, and an output mechanism attached to the base portion and configured for displaying different nutritional information values. The output mechanism may include one or more removable strips. The plurality of breath and saliva samples received from the user via the nipple are analyzed for nutritional information, preferably, continuously and in real-time, and the nutritional information includes at least one of carbohydrates, fats, minerals, protein, fiber, vitamins, water, salt, sugar, sodium, antioxidants, and phytochemicals.