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The velvet antler of Korean sika deer has been used to the important resources for human health care with ginseng in Korea and Chinese. For studying on biological function of deer velvet being recorded in many ancient literatures, this experiment was conducted to evaluate the effects of powdered velvet antler on growth, feed intake, feed efficiency and intestinal organ development in growing and adult Sprague-Dawley Rats. Experiments were designed by adding amount of powdered velvet antler such as control (non-supplementation), powdered velvet antler Ⅰ (PVA Ⅰ, recommended dos) and powdered velvet antler Ⅱ (PVA Ⅱ, thrice recommended dose). The recommended dose of powdered velvet in this experiment was calculated with metabolic body weight of rats, which based on the recommended amounts for 70㎏ of human. The growths of growing and adult rats generally appeared advantage in PVA supplementation. The final body weight of control, PVA Ⅰ and Ⅱ were respectively 470±39.00g, 478±3033g and 475±22.72g in growing rats, and 485±38.50g, 521±38.67g and 508±34.44g in adult rats. The average daily feed intake were not significantly influenced but the feed efficiency ratios (feed／gain) were improved by PVA supplementation. The feed／gain ratios of control, PVA Ⅰ and Ⅱ were respectively 5.99, 5.47 and 5.54 in growing rats, and 9.04m 7.73 and 8.18 in adult rats. In case of developments of liver, heart, kidney and stomach, we obtained favorable results in both PAC Ⅰ and Ⅱ, but their results were not significantly different according to amount of PVA supplementation. Because liver and heart are important organs in the circulation of blood, their favorable effects suggest that velvet antler may have factors contributing hematopoiesis. Conclusively, supplementation of that velvet antler may have factors contributing hematopoiesis. Conclusively, supplementation of powdered velvet antler resulted in an improved growth, feed efficiency and development of some intestinal organs in growing and adult rat. Even if further investigation of dose in human health care are should be performed, this experiment appeared the best desirable results in PVA Ⅰ, recommended dose of powdered velvet antler.
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