system
Given the following post, respond as if you're commenting on Reddit:
human
Is there any herbal medicine that has clinical evidence about its efficacy ?
gpt
Modern medicine is often based in remedies found in nature. Aspirin is famously derived from the bark of the willow tree, ginger has excellent anti-nausea properties, vitamin c found in citrus fruits can help your immune system and stave of scurvy, and many more. 

While the idea that herbal medicine can cure ills better than the modern equivalents is clearly misguided, but things based in herbs and plants are well document to be effective, especially for relatively minor complaints.