On the assessment results of the wheat fiber quality and nutrient composition

The purpose of the study is a comparative assessment of the quality and nutritional value of wheat fiber from different manufacturers. Tasks: to evaluate the physico-chemical and organoleptic quality indicators; study the nutrient and mineral composition of fiber. The object of the study is fiber: "Vitamin Glade" (composition: wheat grain shell, apple fruit, cranberry berry, blueberry berry, lingonberry berry, rosehip fruit) (sample 1); "Large fiber" (composition: wheat fiber) (sample 2). It was established that the physicochemical and organoleptic characteristics of both product samples corresponded to the regulated quality levels. The actual content of macronutrients in both fiber samples deviated from the norm: the amount of protein in sample 1 was 2 times higher than the value declared by the manufacturer, lipids - by 23.3 %; in sample 2, the content of these components was lower than the values by 8.1 and 44.7 %, respectively. The level of dietary fiber in sample 1 was also underestimated by 27.2 %. On the packaging of the same sample, neither the names nor the levels of vitamins contained in it were indicated, which contradicts the name of the product itself and violates the requirements of TR CU 022/2011. The revealed amounts of vitamins in sample 2 were below the norm: thiamine - by 2.8 times, riboflavin - by 4.7 times, niacin - by 4.5 %. In the study of the mineral composition in both product names, 17 mineral elements were identified with a predominance of essential (47 %). Of the elements that are of great physiological importance for the human body, sample 2 contained more Mo (2 times), Zn (by 56.4 %), Mg (by 26.7 %), Cu (by 23 %), from conditionally essential - more than Sr (by 1.6 times), Ni (by 43.6 %) and Si (by 10.6 %). In sample 1, the Pb content was 56 % higher than the MPC established by the requirements of TR CU 021/2011 for bran and dietary supplements mainly based on dietary fiber, which is unacceptable.