The deep fried chocolate bar is a snack that the international community strongly associates with Scotland. It has previously been cited as being "a symbol of all that is wrong with the high-fat, high-sugar Scottish diet". Despite the snack's reputation, no medical research has been performed to examine the effects of consuming a deep fried chocolate bar on the human body.

In contrast to the deep fried chocolate bar, porridge has been shown to reduce the risk of cardiovascular disease, but its effect on cerebral blood flow has yet to be directly assessed.

This study will focus on the potential (patho)physiological cerebrovascular effects of the deep fried chocolate bar and porridge. The research question to be addressed in this study is "Does eating a deep fried chocolate bar or bowl of porridge induce changes in cerebral blood flow and cereborvascular reactivity in healthy adults?"

To assess the acute effects on eating either food on blood flow through the largest artery in the brain, the investigators will give healthy volunteers one regular-sized deep-fried chocolate bar or a bowl of porridge. Blood flow through the largest artery in the brain will be assessed using simple ultrasounds tests. The investigators aim to recruit 24 volunterrs who will visit twice, consuming a different food on each visit.

Inclusion Criteria:

• BMI between 18 and 30
• No regular medication
• Able to provide informed consent

Exclusion Criteria:

• Distaste for or contraindication to deep-fried chocolate bar or porridge ingestion
• inability to perform breath-hold