Author(s):

Rajesh Dalal and Devvrat Kosti

Abstract: The growing concerns of consumers on the use of antibiotic as a growth promoter in livestock feed have fuelled the interest in alternative products. The future of these phytogenic feed additives depend on the characteristics of herbs, the knowledge on their major and minor constituents, the in-depth knowledge on their mode of action and their value based on the safety to animal and their products. Curcumin stimulates bile production which will be required in emulsification of lipid. Supplementation of turmeric powder is expected to improve liver metabolism and maximize vitellogenin synthesis. Vitellogenin is transported through the circulation to the developing follicles and deposited on the yolk. Turmeric powder can also improve liver function. Besides these properties they are also reported to stimulate feed intake and endogenous secretion and enhance production. Digestibility of crude protein, crude fat, ash and the biological value of protein increased with increasing level of dietary turmeric. Turmeric had positive effect on lowering blood triglycerides, total cholesterol and LDL-cholesterol. Turmeric also improved HDL-cholesterol and might be used as an ingredient in laying hens diet for manipulating egg composition. The decrease of total lipid and cholesterol may be due to the effect of essential oil compounds present in the turmeric on lipid metabolism. Phenolic compounds administration like Curcumin may reduce gut inflammation, improve digestibility of nutrients and metabolism.

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