Is it safe to take two doses of melatonin?

Taking too much melatonin can disrupt your circadian rhythms (sleep-wake cycle). It may also cause other unwanted side effects. So, yes, you can technically overdose on melatonin. However, a melatonin overdose can be hard to define since there isn't an official standard safe dose for everyone. read more

Most commercial melatonin based sleep products contain dosages that cause melatonin levels in your body to rise above naturally produced levels – in effect, they amplify the production of melatonin, so the dosage you take is not a good guide for the amount you will have in your blood after taking the supplement. read more

Perhaps ineffective. It has been suggested to take no more than 3mg. and to skip a few days so that your body does not actually produce less, because it grows accustomed to the supplement. read more

Although synthetic melatonin is "chemically identical" to natural melatonin, commercially available supplements "often contain fillers, inert and other ingredients that may cause effects that would not be expected with natural melatonin," Clete Kushida, a sleep researcher at Stanford University School of Medicine, told HuffPost in an email. read more