Personalized healthy diet

INTERVENTION: A healthy diet personalized to the subject based on individual measurements for nine weeks and a diet based on the general recommended French dietary guidelines. CONDITION: Healthy diet, Phenotypic flexibility, Resilience ; ; PRIMARY OUTCOME: The composite biomarker representing “metabolic age” measured at all timepoints during the PhenFlex drink test day (t=0, 30, 60, 120, 240 min). SECONDARY OUTCOME: Metabolic stress markers measured at all timepoints during the PhenFlex drink test day (t=0, 30, 60, 120, 240 min) ; ; ; ; The additional effect of personalizing the advice compared to general advice ; and control, on all markers. INCLUSION CRITERIA: Males and females aged between =25 and =70 years at day 1 of the study (limits included); 2. Apparently healthy as assessed by the Health and Lifestyle questionnaire; 3. Body mass index 20‐35 kg.m‐2 (limits included) (preferably BMI range 25‐35 will be included first when possible); 4. Non restrained eater, based on the Three Factor Eating behavior Questionnaire (TFEQ)(15) 5. Able to use online technology on smartphone and a PC/laptop which has good access to the internet; 6. Appropriate veins and circulation for blood sampling according to Biofortis; 7. Good general and mental health according to the investigator: no clinically significant and relevant abnormalities of medical history or physical examination; 8. Able and willing to voluntary participate to the study by complying with the protocol procedures as evidenced by his dated and signed informed consent for