*3.1. Global Evolution Trend*

From 1960 to 2019, more than 110,000 studies related to medicinal plants have been published. Figure 2 shows the trend in research in this field. Overall, it can be said that there was a continuous increase from 1960 to 2001, with just over 1300 published studies. From here, the trend increases faster until 2011, when it reaches a maximum of just over 6200 publications. After this period, publications stabilize at just over 5000 per year. These three periods identified are highlighted in Figure 2.
