Reduced Carbohydrates + Ketogenic Supplement on Energy Metabolism

Inclusion Criteria: * Older men or women in a senior residence; * Understand, read and write French; * Have sufficient visual and hearing acuity to pass cognitive tests; * Available during the intervention period Exclusion Criteria: * Body mass index \< 20; * T1 diabetic; * T2 insulin-dependent diabetic; * MMSE \< 20; * Weight loss \>10% in the last 6 months involuntary or voluntary; * Known and uncontrolled hypoglycemia; * Moderate to severe digestive illnesses that can be aggravated by dietary changes; * Severe dysphagia; * Supplementation with MCT oil, ketone salts, ketone esters, adherence to the ketogenic diet, reduced carbohydrate diet, intermittent fasting or other diet or supplements that can significantly increase ketones in the last month; * Participation in other interventional research projects on nutrition or aimed at metabolic change simultaneously. * Medical condition that could prevent the participant from completing the study in the opinion of the doctor