6. Melatonin supplementation can help blind people
We are all very lucky to have the gift of sight, but not everyone is able to reap the benefits of billions of years of evolution. Sight is one sense that has evolved in many species independently through the eons in what is called convergent evolution, but some people are born blind.
In addition to the obvious drawbacks of not being able to see, blind people also can’t tell whether it’s night or day. This can lead to poor sleep due to a dulled circadian rhythm.
Seeing as melatonin is the hormone responsible for regulating the internal clock of your body, it can make life easier for those who are blind. This is also useful for workers who have night jobs as it can regulate their circadian rhythm even if they get limited exposure to natural sunlight — making it easier for them to sleep during the day.