Various studies place the average age of cataract surgery patients at between 70 and 73. More Info: The incidence of cataracts among Americans is relatively high.
Serotonin. Serotonin is an inhibitory neurotransmitter involved in the regulation of mood, anxiety, libido, compulsivity, headaches, aggression, body temperature, eating disorders, social anxiety, phobias, sleep, appetite, memory and learning, cardiovascular function, muscle contraction, and endocrine regulation.
1 Serotonin is a neurotransmitter produced by the body that plays a role in regulating behavior, pain sensation, appetite, movement, body temperature, and function of the heart and lungs. 2  Too little serotonin is associated with depression; too much can cause a potentially fatal condition called serotonin syndrome (SS).