CONTENT AND PHYSIOLOGICAL PROPERTIUES OF POLYPHENOLS IN HIGH- AND LOW-TANNINS FABA BEAN SEED APPLIED IN POULTRY DIET

Composition and physiological properties of polyphenol fractions from faba bean with low tannin content (LT), compared with high tannin FB (HT) and soybean meal (SBM) was to investigated. In comparison with HT seeds, in LT ones two times less polyphenols content, higher ABTS and DPPH and but lower FRAP values was determined. Irrespective of the FB type seeds, SBM was characterized by a lower polyphenol content and lower value of ABTS and FRAP. Both types of FB seeds were used as a substitute for SBM at three dietary levels: 10, 20 and 30% of a diet for for growing turkeys. After 8 weeks of experimental feeding, biochemical serum parameters and liver TBA were determined. Differences in the content of polyphenols and antioxidant properties of faba beans seeds had no effect on the analyzed biomarkers, except for lowering effect on blood glucose level caused by low-tannin seeds. Most observed effects, irrespective to the applied dietary dosages, were connected to the dietary substitution of SBM by Vicia faba beans, and as the whole should be regarded as positive changes.