Why are so many medicinal plants are discovered in the rainforest of the world rather than in other biomes?

Rainforests are home to a vast biodiversity, with complex ecosystems that support a wide variety of plant species, many of which have not been thoroughly studied. The dense canopy and humid environment create ideal conditions for unique biochemical compounds to evolve, which plants may use for defense against pests and diseases. Additionally, the rich soil and microclimates in rainforests contribute to the growth of plants with medicinal properties, making them more likely to be discovered there compared to other biomes. This biodiversity, coupled with limited exploration, makes rainforests a prime source for new medicinal plants.