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A bottle of melatonin tablets. Melatonin is also available in timed-release and in liquid forms. A prolonged-release 2 mg oral formulation of melatonin sold under the brand name Circadin is approved for use in the European Union in the short-term treatment of insomnia in people age 55 and older. [11] [29] [8]
The popular sleep aid can have side effects.
Melatonin, an indoleamine, is a natural compound produced by various organisms, including bacteria and eukaryotes. [1] Its discovery in 1958 by Aaron B. Lerner and colleagues stemmed from the isolation of a substance from the pineal gland of cows that could induce skin lightening in common frogs.
For example, the chewable sample tested had almost 9 mg of melatonin when it was supposed to contain 1.5 mg. “And in the form of gummy bears, this probably isn’t the most accurate way to dose ...
Melatonin supplements for sleep come with side effects and their use may raise safety concerns, experts say. There's little evidence they help with insomnia.
Large doses of melatonin can even be counterproductive: Lewy et al. [48] provide support to "the idea that too much melatonin may spill over onto the wrong zone of the melatonin phase-response curve." The long-term effects of melatonin administration have not been examined. In some countries, the hormone is available only by prescription or not ...