The article is devoted to the rationale for the use of water-based rosebay willowherb extract in canned milk technology in order to increase nutritional value. The article presents the data on the nutrient composition of water-based rosebay willowherb leaves, and calculations of daily requirements for vitamins and minerals when consuming skimmed milk with sugar, produced with the addition of the water-based rosebay willowherb extract. It was found that adding water-based rosebay willowherb extract to the formula of skimmed condensed milk with sugar will give the product functional properties by increasing the content of manganese, calcium and vitamin B6.