Effect of a Fermented Dairy Food With Probiotics on Mental Performance

Inclusion Criteria: * Men and women aged 18-60 years. * Individuals with a diagnosis of mild-moderate stress according to the Cohen's perceived stress scale perceived stress scale (PSS-10). * Subjects with poor adherence to the Mediterranean diet according to the PREDIMED questionnaire (value below 9 points)\*. * BMI between 19 and 30 kg/m2. Exclusion Criteria: * Present chronic and/or acute digestive pathologies that may interfere in the absorption of nutrients (inflammatory intestinal diseases, inflammatory bowel absorption of nutrients (inflammatory intestinal diseases, etc.), etc.) * Intake of probiotics and/or prebiotics in the four weeks prior to the inclusion in the study. * Individuals who are on antibiotic treatment or have completed an antibiotic treatment during the 30 days prior to inclusion in the study. * Vegan diet. * Being taking any type of supplementation that interacts with cognitive level in the 2 weeks prior to the start of the study. * Individuals who had taken or were taking any medications or supplementation for stress management, mood, or to induce sleep in the 2 weeks prior to the start of the study. * A history of allergic hypersensitivity or poor tolerance to any component of the products under study. * Consumption of 2 or more Standard Drink Units (UBE) daily or 17 weekly in women, or consume 4 or more UBE daily or 28 weekly in men. * Smoking and non-smoking subjects who have modified their nicotinic habits in the last 3 months. * Pregnant or lactating women. * Been participating or have participated in another clinical trial in the 2 months prior to the study to the study. * Unwillingness or inability to comply with the procedures of the clinical trial. * Subjects with any diagnosed psychiatric disorder. * Subjects whose condition makes them ineligible for the study in accordance with the criteria of the investigator.