Study visit 2,3,4: following the acclimatization visit, participants will attend 3 more study visits separated by a week to test the metabolic response to the following fats: palm olein, interesterified palm olein and soybean oil in random order. Participants will be asked to complete a visual analogue scale questionnaire about their appetite at each time point. Fasting and postprandial plasma glucose, insulin, appetite hormones and lipids will be measured.