…However,it is now known that their beneficial or detrimental properties depend upon their chemical structure (generally associated with the plant origin) and dosage, besides other factors such as animal species,the physiological state of the animal and composition ofthe diet. More recent evidence suggest that moderate tannin level is able to improve both nutrition and health status in monogastric animals…
…The use of plant extracts appears as an attractive alternative to the use of antimicrobial growth promoter factors. These natu- ral products do not leave residues in poultry-derived products. Also, plant extracts are complex substances with many bioactive principles that would have fewer chances to induce resistance in microorganisms…
然而, 现在知道单宁的有利或有害的性质取决于他们的化学结构 (通常与植物来源相关)、 剂量、 其他因素如动物种类、动物生理状态和动物膳食的组分。最近的证据表明适量度的单宁水平能够改善营养和单胃动物的健康状况。