In the present study, it is aimed to consider the advantages and disadvantages of plants containing flavonoids and saponins and the effects that may arise from the use of these ingredients in feed raw materials and to regulate their rations accordingly. For this purpose, the proportions found in different feed ingredients will be shown in a table and their effects on animals will be revealed. In terms of animal nutrition, the problems that may arise in case of excessive use of plants containing flavonoid and saponin vary depending on the species, physiological condition of the animal, the structure and amount of the grain. Treatment with synthetic and natural antioxidants is applied as a standard process so that flavonoids can be stored for a long time without spoiling. Both the nutritional protection properties of these compounds and their ability to act as antioxidants after entering metabolism and protect the cell against oxidizing agents are known. The most important functions of saponins are; by acting on the hypothalamus, it can be counted as appetite enhancing, ammonia binding, inhibiting urease activity, lowering surface tension in intestinal epithelial cells, anti-protozoal, antibacterial, anti-fungal and antioxidant properties. In many plants such as legumes, alfalfa, spinach, and beets, saponins from 0.5 g / kg to 87 g / kg of DM can be found and from 5% to 18%. Although there is a difference in the literature on the usage rates, it is suggested that 1500 ppm Yucca Schidigera (YS) and 30 g / day tea saponin can be used in ruminant diets.