Fish Collagen Peptide Food Supplement on Weight and Body Composition

Inclusion Criteria: * Men in overweight (BMI between 25kg/m² and 30kg/m²) * Aged from 18 and 60 years * Having signed the informed consent form; * Susceptible to follow the constraints generated by the study; Exclusion Criteria: * Subject treated for type 1 or 2 diabetes, or for any other metabolic disorder (severe dyslipidemia: TG\> 3 g / L and total cholesterol\> 2.5 g / L); * Subject with untreated and uncorrected high blood pressure; * Subject with untreated or uncorrected dysthyroidism by drug therapy; * Subject with a serious general illness that may prevent his or her ability to complete the trial or that could bias the results of the study; * Subject consuming antibiotic treatment in the month prior to inclusion; * Subject treated with steroidal anti-inflammatory drugs, anabolic steroids, anticoagulants or corticosteroids; * Subject knowing allergy to fish or fish collagen; * Subject taking any dietary supplement or drug that may interact with the results of the study or that could alter the bioavailability of the product under study; * Subject following or having followed a low-calorie diet (energy intake \<1500 kcal / day) in the 3 months preceding inclusion and / or likely to undertake this diet during the test; * Subject having lost more than 5% of his initial weight during the last 3 months; * Subject following a special diet: eg. vegetarian, macrobiotic diet, high protein diet; * Subject with diagnosed eating disorders (anorexia, bulimia); * Subject with gastrointestinal malabsorption such as celiac disease, Crohn's disease or lactose intolerance; * Subject having undergone bariatric surgery; * Subject with excessive alcohol consumption at more than 3 drinks a day ; * Subject planning to modify his tobacco consumption (eg weaning) or his level of physical activity (significant increase) before the end of the intervention period; * Subject having an aversion to the grapefruit aroma; * Subject unable to understand or adhere to the protocol; * Subject participating in another clinical study or exclusion period from another study;