Homeopathy

For example, when you chop an onion, your eyes water and your nose runs. According to the logic of homeopathy; when a person whose eyes are watering and nose is running due to a cold or allergy is given a homeopathic "remedy" obtained from an onion and diluted billions of times, the body's immune system is stimulated to overcome these symptoms.

Because homeopathic medicines are diluted to the point where not even a single molecule of the main substance remains inside, modern medical and scientific circles argue that this is a "Placebo Effect" and has no chemical therapeutic property. However, the World Health Organization (WHO) defines homeopathy in the category of "Traditional and Complementary Medicine" practices, and it is used as a supportive treatment in many countries.