Ready-to-use diet food composition to reduce low-grade inflammation and stabilize weight loss in the long term in an obese or overweight patient comprising, as a proportion of the total weight of the composition:50% to 80% by weight of protein；2% to 20% by weight of carbohydrates； and,2% to 15% by weight of lipids；said lipids including 0.25% to 2% by weight of docosahexaenoic acid (DHA) relative to said weight of lipids.The invention also concerns ready-to-use portions of diet food, a kit comprising a food portion and DHA capsules as well as the use of DHA to prepare a food composition or food portions according to the invention.
