Nutrition in the digital age - How digital tools can help to solve the personalized nutrition conundrum

•Self-learning systems have the potential to improve an individual's health through diet management.•Current apps focus on measuring food intake, which is extremely difficult to achieve.•Combining behaviour and physiological responses into a single entity removes the requirement to measure food intake.•The proposed system enables the user to painlessly map their individualised 'path of least resistance' to specific health outcomes.•Deep scientific understanding, beyond scientifically validated biomarkers, is not necessary in order to optimise individual responses.