A device for monitoring food intake by a user to whom the device is attached includes at least one camera to acquire a series of images of at least a partial view of a manipulable limb of the user. A processor is configured to apply a probabilistic model to determine based on the series of images if a motion of the limb corresponds to at least one predetermined gesture that is indicative of taking a bite. A recorded sequence of events is updated when the motion is determined to correspond to a predetermined gesture. A signaling unit is operable by the processor to produce a signal that is sensible by the user, the signal being indicative of the updating of the sequence of events.
