Assessment of Reward Responses to Erythritol Using Flavor Preference Learning

Inclusion Criteria: * Healthy normal weight participants with a body-mass index (BMI) of 19.0-24.9 kg/m2 * Age 18-55 years * Stable body weight (±5%) for at least three months * Able to give informed consent as documented by signature * 3 drinks rated as neutral and novel (from the flavor preference learning) Exclusion Criteria: * Non-taster (deficits of taste and smell) or supertaster * Fructose intolerance * Shift worker * Pre-existing regular consumption of erythritol and/or sucralose and/or aspartame (\>1/week) * Substance abuse (more than 1 glass wine/beer per day; consumption of cannabis, cocaine, heroin, etc.) * Regular intake of medications, except contraceptives * Chronic or clinically relevant acute infections * Pregnancy: although no contraindication, pregnancy might influence metabolic state. * Participation in another study with investigational drug within the 30 days preceding and during the present study * Pre-existing diet (vegetarian, vegan, sugar free) * Inability to follow procedures due to psychological disorders or insufficient knowledge of project language (German) * Calculated dose of erythritol outside the range of 30-60g (per 300mL) (from the sweetness matching)