Nutritional evaluation and bioactive compounds of flours of unconventional edible roots

Abstract

The bakery sector has increasingly sought flour alternatives, such as unconventional edible root flours, with technologically viable characteristics for industrial production, with greater nutritional value and pleasing consumers in their sensory aspects. So, this work aims to evaluate the nutritional value and bioactive compounds of unconventional edible root meals: purple yam (Dioscorea alata), Jerusalem artichoke (Helianthus tuberosus) and ariá (Calathea allouia). Moisture, protein and ash were determined by standardized bromatological methods, lipids by the Bligh-Dyer method, total crude fiber (TGF) by means of the Fiber Analyzer-Ankom 220 device and carbohydrates by difference. The determination of the total phenolic compounds and tannins in the samples were performed using colorimetric analysis methods. A significant variation (p<0.05) was observed between all samples for the humidity (8.31 to 9.37%); proteins (7.47 to 8.93%); ash (3.15 to 4.42%); lipids (0.13 at 1.76%); fiber (0.92 to 4.85%) and carbohydrates (71.52 to 78.18%). For the bioactive compounds, the variation of total phenolics was from 7.35 to 100.77 mg EAG/100g, and for the tannins 0.28 to 1.41 mg EAT /100g. The study showed that the analyzed samples have significant nutritional value, as well as bioactive compounds that can be used in food product formulations.