With the abundance of energy-dense foods that are designed for ease of consumption in the current environment, it is of importance to better understand the factors that may undermine the control of energy intake at healthy levels.

One of the factors that is potentially important in response inhibition is caffeine.

The aim is to assess the direct effects of caffeine on response inhibition, using a No Go/Go-task. We will also assess whether the presentation of food cues, i.e. as words or as pictures, modulate response inhibition different in restrained vs. non-restrained eaters.

In a blinded, randomized cross-over design, participants will receive either a capsule with caffeine or placebo at two separate occasions whereupon study tasks will be performed.

Inclusion Criteria:

• Only males
• 18 ≤ 35 years
• Healthy (self rated)
• Used to drink caffeine
• Used to eat breakfast regularly (≥ 5 times a week).
• Non-smokers

Exclusion Criteria:

• BMI outside the range of 18,5 ≤ 25
• hypersensitivity for the ingredients of the foods under study
• being a vegan or vegetarian. Participants reported not using products that are artificially sweetened, nor sugar in coffee and/or tea
• Presence of any chronically disease and/or treatment with medication