Emerging research highlights the effectiveness of melatonin for specific sleep disorders while raising concerns over its use in children. Experts advise seeking medical guidance for persistent sleep problems and caution against excessive doses or unsupervised use, especially among minors.
Poor sleep is not just an inconvenience. Over time, sleep deprivation has been linked with higher risks of high blood pressure, obesity and diabetes, which is why persistent insomnia should be assessed by a doctor rather than managed solely with over-the-counter remedies. According to the lead article’s reporting, supplements are sometimes useful for short-term or mild sleep problems, but they do not replace proper diagnosis or treatment when symptoms are severe or ongoing.
Melatonin tends to be the better-known option, and evidence compiled by the Sleep Foundation and the Mayo Clinic suggests it is most useful when the body clock is out of sync, such as with jet lag, delayed sleep phase disorder or shift work. It works by reinforcing the body’s natural sleep signal as darkness falls, helping some people fall asleep earlier and sleep for longer. The article cites a 2024 analysis linking 2 mg to 4 mg taken about three hours before the desired bedtime with better sleep onset and duration, although experts caution that timing matters and that doses above 5 mg should not be used without medical advice. The Mayo Clinic also notes that melatonin can cause headaches, dizziness and drowsiness and may interact with anticoagulants and other medicines.
The question of melatonin use in children is more sensitive. The lead article says paediatric doses should be limited to no more than 1 mg a day and only on a paediatrician’s advice. It also refers to US data showing more than 260,000 melatonin exposures among children and teenagers between 2012 and 2021, with most cases accidental rather than due to prescribed use. JAMA’s discussion of the same CDC findings highlighted a sharp rise in severe poisonings and hospitalisations as melatonin products became more common in homes.
Magnesium, by contrast, has a thinner evidence base. Healthline and sleep specialists quoted in the lead article suggest it may help with minor sleep complaints, particularly in older adults or people whose poor sleep may be linked to stress or low magnesium levels, but it is not recommended in guidelines as a standard insomnia treatment. The article cites Michael Grandner of the University of Arizona as saying that the effects are usually modest, and that 250 mg of magnesium glycinate or bisglycinate in the evening is a reasonable way to try it. For people with long-term sleep problems, the clearest message remains the same: seek medical advice first, because the right treatment depends on the cause.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
