In vitro impact of condensed tannins on the caecal metabolites of chickens

Tannins are a diverse group of plant phenolic compounds. Condensed tannins (CTs) represent major subgroup and were extracted from tilia (Tilia L.) flowers black locust (Robinia pseudoacacia) leaves. These extracts examined for their effects on the metabolic profile chicken caeca. By using in vitro, nuclear magnetic resonance (1H-NMR), which was combined with multivariate statistics, current study applied first time to investigate how three different CT compositions, procyanidins (PC) and/or prodelphinidins (PD) units influenced end-products caecal contents chickens. In presence tannins, glutamate, leucine, lysine, pyroglutamate, phenylalanine, proline, sarcosine significantly decreased. fermentation, increasing concentrations some fatty acids such as acetate, butyrate, propionate whereas. contrast, lactate decreased between treatments. This identified key structural features CTs that contain either high molar proportions PD or PC, might be useful improve efficiency feed utilization