Device, system and method for caloric intake detection

Device for caloric intake detection due to digestion, said device comprising:

• a respiration input for obtaining a respiration signal indicating the subject's respiration,
• an analysis unit for analyzing the obtained respiration signal by
• determining one or more respiration signal features from the obtained respiration signal
• detecting one or more changes of the one or more determined respiration signal features over time, wherein said changes include changes of the group of changes including
• an increase in respiration frequency,
• an increase of the amplitude of the respiration signal,
• a decrease of the inter-breath interval,
• an increase of the amplitude of the dominant frequency in the frequency spectrum of the respiration signal, and
• a changed in the respiratory variability, and
• detecting a period as a periods of caloric intake due to digestion by the subject if one or more of said changes has been detecting during said period.