3. It starts working less when you’re older
One of the drawbacks of using melatonin to aid with regular sleeping schedules is the fact that its efficacy degrades with age. Many studies have shown that the effect that melatonin has on the body becomes less pronounced as people get older. The human body also reduces its natural production of melatonin as you age. This leaves a greater deficiency of melatonin in some.
If you seek to balance the levels of melatonin in your body throughout the course of your life, you can gradually raise the dosage of your melatonin supplements as you get older. Be sure to consult with your doctor before changing dosages to ensure that no adverse effects manifest as a result of excessive levels of melatonin. As the saying goes, too much of a good thing is a bad thing. The same is true for water, vitamin C, and melatonin — among others.