Could some people with insomnia be low in serotonin?
Article in life-enhancement.com writes …
“Serotonin production declines with age, and at any age its abundance can be compromised further by stress. Low levels of serotonin are most commonly manifested by depressed mood, anxiety, and insomnia.”
This is due to the metabolic pathway that converts tryptophan to 5-HTP to serotonin to melatonin. Serotonin naturally decreases with age because this pathway may no longer be as efficient or there is less raw ingredients available. So that may explain why older people have more insomnia than younger people.
It may also explain why supplements like trytophan, 5-HTP, and melatonin may improve sleep. However, be careful with taking such supplements. They are not right for everyone. Research them and check with your doctor first.