Melatonin

What is Melatonin?

Melatonin is a hormone your brain releases as darkness falls, your body’s internal “it’s nighttime” signal. It does not knock you out like a sedative; it tells your circadian clock that sleep is coming. Supplemental melatonin is a lab-made copy sold over the counter as tablets, gummies, and liquids, in doses that range absurdly wide, from a tiny 0.3 mg up to 10 mg or more.

What does Melatonin claim to do?

Claims include falling asleep faster, beating jet lag, resetting a shifted sleep schedule (for shift workers or night owls), and, more speculatively, antioxidant and anti-aging effects, since natural melatonin declines with age. Some market it as a general “longevity” supplement.

Why do people use Melatonin?

Melatonin is the default DIY sleep aid: cheap, available everywhere without a prescription, and seen as natural and non-addictive. It has become a cultural staple, with gummies on every pharmacy shelf. Frequent travelers swear by it for jet lag, and the aging-related decline in natural melatonin gives the longevity crowd a tidy rationale for topping it up.

What does the science actually say about Melatonin?

Melatonin’s real strength is specific and worth understanding: it is a circadian timing signal, not a sedative. It works best for problems of timing rather than general insomnia. The human evidence is strong that melatonin is associated with faster sleep onset and is genuinely helpful for jet lag and for shifting a misaligned body clock. That is where it shines. For ordinary “I just can’t sleep” insomnia, the effect is real but modest: studies show it helps people fall asleep somewhat faster, with a smaller effect on total sleep.

A crucial and underappreciated point: more is not better, and may be worse. Lower doses (around 0.3–1 mg) often work as well as or better than the 5–10 mg products that dominate shelves, because the lower dose better mimics your body’s natural levels. High doses can leave people groggy and may blunt the timing signal. Timing matters too, taken at the wrong hour, melatonin can shift your clock the wrong way.

Antioxidant and anti-aging claims rest mostly on lab and animal research; direct human longevity evidence is thin. And independent testing has repeatedly found over-the-counter products containing far more (or less) melatonin than the label claims, which is a real quality concern.

How do people use Melatonin?

For most uses, people take a low dose of 0.3–1 mg about 30–60 minutes before the desired bedtime. For jet lag, the common approach is a small dose timed to the destination’s evening for the first few nights. Extended-release versions exist for those who wake in the night. Because it is a timing signal, consistency of timing matters more than size of dose.

Is Melatonin safe? Risks and who should skip it

Melatonin is generally safe for short-term use. Side effects include grogginess, vivid dreams, headache, and next-morning drowsiness (more common at high doses). It can interact with blood thinners, blood pressure medication, and sedatives, and may affect blood sugar. Because it is a hormone, its long-term and developmental effects are not fully mapped, many experts urge caution in children despite popular gummies. Check with your doctor if you are pregnant, nursing, on medication, or considering it for a child.

The bottom line on Melatonin

For jet lag and resetting a shifted sleep schedule, melatonin is one of the best-supported tools in this book, but use it as a low-dose timing signal, not a high-dose knockout pill. For routine insomnia it helps modestly. The anti-aging hype is not yet backed by human evidence.