A system and method for generating meal suggestion messages using an expert system and then pushing those suggestions to users. Meal suggestions are tailored to users based on their tastes and preferences. Users specify preferences related to a diet plan, food preferences, meal time preferences, and meal preparation preferences. An expert system considers each user's preferences and nutritional data to generate meal suggestion messages consistent with the user's preferences and dietary goals. Meal suggestions are pushed to the user according to the user's preferred time for eating each meal. The user can accept or reject the suggested meal or one or more foods within a suggested meal. For rejected meal suggestions, a meal substitution message is generated and sent. The expert system uses accepted and rejected meal suggestions to determine if certain foods or entire meals should no longer be recommended to individual users or to system users as a whole.