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Abstract
Majumdar, S. and Moudgal, R.P. 1994 Effect of tannic acid on activities of certain digestive enzymes and alkaline phosphatase in intestine and glucose absorption in adult chickens. J. Appl. Anim. Res., 6: 105–112.
The effect of dietary fortification with tannic acid at 100, 200 and 300 mg/day/bird on the activities of lipase (EC 3.1.1.3), trypsin (EC 3.1.21.4), amylase (EC 3.2.1.1) and alkaline phosphatase (EC 3.1.3.1) in the epithelial cells of intestine, glucose absorption across the intestine and feed intake (gm/bird/day) were studied in adult White Leghorn females. Low concentration of tannic acid (100mg/day) did not change the feed intake but further increase in the concentration of tannic acid reduced the intake. Tannic acid elevated the glucose absorption rate and uptake peak was noticed in the birds fed on 300 mg/day of tannic acid after 10 min post-injection of glucose solution. Low concentration of tannic acid did not influence the activities of amylase, lipase and trypsin. Increase in the concentration (200 and 300mg/day) enhanced the activities of these enzymes. However, alkaline phosphatase activity was gradually increased with the increase in the tannic acid concentration. The evidence gathered from this study revealed that tannic acid in the above concentrations create some favourable conditions in the intestine for better nutrient digestion and uptake.