Spread Enriched With 5-hydroxytryptophan, Theanine and Gamma-aminobutyric Acid will be given to the subjects enrolled to this arm, 20 gram twice daily with breakfast and supper (instead of butter)

This group will receive standard spread, without theanine, gamma-aminobutyric acid and 5-hydroxytryptophan, twice daily with breakfast and supper with food (instead of butter)

Food for special dietary use (spread) with modified ingredients' content will be included to the diet of 70 patients without significant organic pathology for 14 days receiving standard diet, modified by the inclusion of two portions of the spread, 20 grams each for breakfast and dinner

change in score by Lurie test

change in Kraepelin&Schulte test score

change in functional status test score

change in Beck depression inventory score

change in food's taste monotony