The invention provides a food supplement comprising chromium and the five amino acids leucine, isoleucine, valine, threonine and lysine, wherein leucine, isoleucine, valine, threonine and lysine are the only amino acids present in the food supplement, and wherein the sum content of the five amino acids is from 1.75 to 3.5 g per dose of the food supplement, and wherein the content of chromium is from 4.5 to 61 μg per dose of the food supplement. A food composition comprising the food supplement, as well as the five amino acids for use in a method of treating, controlling or preventing diseases or conditions related to the metabolic syndrome, treating or controlling diabetes, treating, controlling or preventing obesity, promoting satiety, promoting weight loss, or promoting maintenance of a healthy bodyweight, by lowering postprandial glycaemia, and preferably also by lowering postprandial insulin secretion, are also provided.
