Abstract: The dietetic food concentrate is a pourable powder containing soy protein, honey and at least 50% by weight of albumin so that it is easily digestible. It is made by mixing ⅓ to 6 percent by weight of lecithin with a protein-containing starting material to obtain an intermediate mixture, which is then mixed with 25 to 30 percent by weight of honey to obtain the product. The food concentrate powder contains 30 to 50 percent by weight soy isolate and an animal-protein-containing material, preferably a milk powder. During mixing in of the honey the temperature is preferably kept below 40° C. to avoid denaturing proteins. A method of treating a diabetic to reduce blood sugar level includes daily administration of an effective amount of the food concentrate powder. The product is also useful for reducing fat tissue and for treating amino acid deficiency illnesses.