For a large fMRI study at the Life & Brain Center of the University of Bonn Medical Center the AG Weber is searching for male participants who are willing to solve simple decision tasks before and after a seven-week intake of a dietary supplement. Interested men should be healthy, between 20 and 60 years old, have a BMI of 25-30 (calculation: weight in kg / (height in m)2), and not have any metal implants. The participants will have to attend an information meeting (2h) and two study appointments (6h each time) with a period of seven weeks in between. As compensation the participant will receive 200€. More detailed information will be provided via mail to any interested person. Please contact Ernaehrung.Studie@uni-bonn.de if you have any questions or would like to take part in the study.