Impact of Omega 3 in Alcohol Use Disorder

Inclusion Criteria: * Diagnosis of alcohol use disorder (≥ 4 DSM-5 criteria) * Patient at the hospital for a 3 week alcohol withdrawal program * Gender : male and female * Age : between 18 and 70 years old * Language : french * Alcohol consumption less than 48 jours before admission Exclusion Criteria: * Presence of another addiction, except for smoking and cannabis use * Presence of a psychiatric comorbidity (axis 1 DSM-5) * Current or recent use (\< 2 months) of antibiotics, probiotics, fibre supplements * Current or recent (\< 2 months) use of omega-3 supplements * Current or recent (\< 2 months) use of oral anti-coagulants drugs * Current or recent (\< 2 months) double anti-platelet therapy * Coagulation disorders * Current or recent (\< 1 month) use of non-steroidal anti-inflammatory drugs and glucocorticoids * Morbid obesity : body mass index \> 35 kg.m-2 * Bariatric surgery * Type I diabetes and type II diabetes not stabilised (i.e. glycated haemoglobin \> 7.2 and unstable drug treatments) * Chronic inflammatory diseases * Cancer (less than 5 years before admission) * Presence of cirrhosis (Fibroscan® = F4 and echodoppler performed as part of clinical routine on patient admission) * Known allergy to fish and seafood * Any other comorbidity that would be a contraindication to the study in the judgement of the principal investigator