I t is known that human beings used only natural medicines until 1800 in the treatment of diseases. Compounds obtained through isolation from natural sources since the beginning of 1800 have been synthesized in the laboratory environment since 1830 [1]. In recent years, the belief that natural remedies are safer than synthetic drugs have led to an increase in people's use of natural products such as herbs, phytotherapeutics and phytopharmaceuticals. Therefore, researchers conduct various studies on the biological significance of plant extracts [2, 3]. However, there is no regulatory system that determines the safety and required dose of natural products, or even commercially sells them. The most widely used of these natural products are herbs. Unfortunately, most of those who use these herbs therapeutically do not have adequate knowledge or training in the safe use of the products. For these reasons, many studies are required to standardize natural plant products and evaluate possible risks such as undesirable side effects, overdose and toxicity [4].Tribulus terrestris L. is known in Turkey as "deve çökerten", "çoban çökerten" and "çarık dikeni". These names were given to the plant because its fruit has horn-shaped spikes (Figure 1