The Effect of an Edible Algal Extract (Ulva Lactuca) on the Component of Depression in Healthy Volunteers With Anhedonia

Inclusion Criteria: * Men or women aged between 18 and 65 years * Presenting a anhedonia with a score ≥5 on the SHAPS Scale * Declaring feeling low for at least 4 weeks characterised by a component of depression evaluated on the QIDS-SR * Being able to apprehend and fill in the evaluation scales Exclusion Criteria: * Subject with a major depressive episode as per the DSM V scale, with a HAM D \> 8, already on anxiolytic, antidepressor, neuroleptic or any other medicinal treatment liable to influence mood (e.g. benzodiazepines) in the last 30 days or using illegal psychotropic substances, or a with daily alcohol intake of more than three glasses of wine * Presenting a psychiatric disorder or in state of post-traumatic stress or having had an electroconvulsive therapy in the last 6 months * Female subject pregnant or breast-feeding or of childbearing age and not using effective means of contraception * subject suffering from an allergy or intolerance to seafood products (fish, shellfish and seaweed)