The objective of the study is to evaluate the cognitive performance of 4 chocolate milk drinks.

Subjects will make a total of 4 visits. Four visits in which they will drink a chocolate milkshake at each visit.

At each visit the subjects will have to come fasting, and they will have to perform the cognitive test at the time when they have their peak glycemic level.

Inclusion Criteria:

• Subjects of both sexes (10 men and 10 women).
• Subjects aged between 20 and 35 years.
• Subjects with a body mass index between 20 and 25 kg/m2.

Exclusion Criteria:

• Subjects suffering from diabetes mellitus or any chronic disease.
• Subjects with medical problems or a diagnosed psychiatric disorder.
• Subjects with alcohol abuse or excessive alcohol consumption (>3 glasses of wine or beer/day).
• Subjects consuming any pharmacological medication that may affect memory.
• Participation in another clinical trial in the three months prior to the study.
• Unwillingness or inability to comply with clinical trial procedures.
• Subjects whose condition does not make them eligible for the study according to the investigator's criteria.
• Pregnant or lactating women.