The aim of the study is to investigate the effect of liquid versus semi-solid meals on the regulation of energy balance in healthy young adults.The main questions it aims to answer are: * Does a protein-rich liquid meal result in less satiety and therefore higher ad libitum energy intake at the next meal than an isocaloric oatmeal with the same macronutrient ratio? * Is the consumption of a protein-rich liquid meal as a beverage in addition to an ad libitum oatmeal less compensated within the meal and at the next meal and provides thus a higher ad libitum energy intake than an isovolumetric noncaloric soft drink in addition to an ad libitum oatmeal? Researchers will compare a protein-rich liquid meal to an isocaloric oatmeal with matched macronutrient composition to answer the first question. Researchers will compare a protein-rich liquid meal + oatmeal to a noncaloric softdrink (water with sucralose and flavoring) + oatmeal to answer the second question. Participants will: * spend 4 intervention days in a metabolic chamber (whole room indirect calorimeter) * consume pre-definied preloads for breakfast and ad libitum lunch meals on 4 intervention days
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ad libitum energy intake
Timeframe: for 9 hours after the consumption of the preloads