Study I: A randomised controled meal test study aimed at studying the acute effect of the alginate-containing beverage on appetite sensation and spontaneous calorie intake (and safety i.e. nausea, well-being etc) in normal to overweight healthy subjects. Here, a placebo beverage or the alginate-containing beverage will be administered as a pre-load before a standardised breakfast meal. Subjective appetite sensation will be measured with Visual Analogue Scale (VAS) every 30 minutes four up to 5 hours. An additional beverage will be administered prior to an ad libitum lunch meal, where spontaneous water and energy intake will be registered.