Scientific studies have proven that Cissus quadrangularis can increase the levels of serotonin.As a neurotransmitter, serotonin has the following functions:1) Mood Regulation2) Maintain Bone Health3) Healthy Bowel Movements4) Sleep5) Blood Clotting Lower levels of this hormone are associated with behavioral and emotional disorders like OCD, anxiety, and depression. Cissus supplements help in supporting overall wellbeing by maintaining healthy levels of serotonin.