Kanna is a plant that is found in South Africa. It is also known as Sceletium tortuosum. Many people think that Kanna is a drug, but actually it is one of the main ingredients in medication that some people think treats depression and anxiety. Certain doctors believe that Kanna contains serotonin. Serotonin is found in many antidepressant and anxiety medications.
Therefore, that is why Kanna is thought to lower anxiety and depression. Even though it is believed that this ingredient that is found in many drugs is safe, there is not enough evidence or research to support that. Instead, many doctors believe that they would not use or recommend Kanna for use in treating depression, but would use a safer medicine.