MedDietAgent is a context-aware mobile computing system aiming at harmonizing one individual’s dietary choises with national dietary guidelines, and more specifically, dietary patterns consistent with the Greek culinary culture, emphasizing the Mediterranean diet. The main innovative element of the MedDietAgent consists in the employment of reinforcement learning techniques, which provide dynamic recommendations by monitoring the user’s environment and targeting at optimizing a reward function. Thus, MediDietAgent acts as an agent which progressively aligns the daily dietary choices to the healthy