 Each participant will undergo 2 study days min.7 days apart and they will eat 2 types of porridge in a random order. Allocation of the order of the porridge meals will be done before the participants are recruited onto the study, using an online randomizer. On one occasion participants will consume porridge made from milled oats and on the other occasion porridge made from flaked oats. Participants will undergo 9 MRI scans of the stomach over a 3h post ingestion period, and after each scan a 4 ml blood sample will be collected via an intravenous cannula. Feelings of satiety will be assessed using a short VAS questionnaire at 9 intervals during the study day. 