Different types raisins' nutritional value comparative evaluation

The results of a comparative assessment of the nutritional value of colored and light Uzbek raisins purchased through the OZON online store (https://www.ozon.ru) are presented. The macronutrients (the amount of proteins and fats, the profile of organic acids and sugars) of dried grapes were studied, the content of functional ingredients (dietary fibers, flavonoids, resveratrol, vitamins) and macro- and microelements were studied. According to the results of studies of the content of proteins and fats, falsification of light raisins was revealed, since their quantitative characteristics did not correspond to the data indicated on the product label. The study of the profile of organic acids and sugars made it possible to identify the ratio of components specific for each type of raisin. So, in both samples of raisins, tartaric acid prevailed, while in colored raisins, the second place was occupied by malic (2710.2±64.1 mg/dm3), the third - by lactic (2163.1±53.2 mg/dm3) acid, in light raisins, on the contrary, the second place - for milk (3800.2±74.3 mg/dm3), the third - for apple (3593.3±71.2 mg/dm3). The quantitative superiority of acids was found in light raisins: tartaric - by 6.7 %, malic - 32.6, lactic - 75.7, citric - by 22.5 %. The ratio of glucose and fructose in the studied types of raisins was 1:1 with a quantitative predominance of monosaccharides in light raisins by 25 and 30.8 %, respectively. Colored raisins turned out to be richer in the amount of such functional ingredients as insoluble dietary fiber (by 15.2 %), niacin (by 36.0 %), riboflavin (2 times) and thiamine, as well as vital mineral elements - Cu and Mn (by 1.6 times), Mg (by 1.4 times), K (by 24.2 %), Fe (by 21.9 %). Light raisins contained more macroelements - Ca and Na (by 1.5 times), P (by 1.7 times) and the trace element Zn (by 34.6 %). The presence of pyridoxine, flavonoids and resveratrol stilbenoid, characteristic of fresh grapes, was not detected in both samples of raisins.