You reached for a stronger dose when the small one did nothing. That is the mistake the label invites. Melatonin is not a sedative. It is a timing signal, a hormone that tells your brain the night has arrived.

It works by binding receptors that read how much is circulating. Those receptors saturate at a low level, the amount your own body makes on an ordinary night. Your natural nighttime peak is tiny, measured in picograms. A dose of three or five milligrams pushes your blood far past anything your body would ever produce.

Past the point where the receptors are full, more does nothing extra for sleep. The excess does not deepen the signal, it just spills over. Where it spills is the problem. Too much melatonin lingers into the morning, and that leftover is the grogginess people blame on poor sleep.

So the high dose does not buy you deeper sleep. It buys you a hangover the next day and a receptor system that dulls to the signal over time.

Does your ear ringing seem to get LOUDER the quieter the room gets?

Especially at night?

If yes, there’s an unusual reason this happens.

And an even more unexpected way researchers are targeting it.

No hearing aids.

No white noise playing beside your bed.

>> See the unexpected approach to nighttime ringing to stop it at the source

The dose question was tested directly. Zhdanova and colleagues, in the Journal of Clinical Endocrinology and Metabolism in 2001, compared a range of melatonin doses.

A low dose near three tenths of a milligram restored sleep as well as the larger ones. The higher doses did not work better, and they raised daytime melatonin, the marker of the morning hangover.

The finding is not obscure. It has been echoed by later work on melatonin as a timing agent rather than a sleeping pill.

Here is the move, unchanged from the earlier issue. Take three tenths of a milligram, half a milligram at most, thirty to sixty minutes before bed. Not three, not five, not ten. The gummy on the shelf is often ten to thirty times the dose you actually want.

Finding the low dose is the hard part, since most products are sold in the high range. Look for a 0.3 or 0.5 milligram tablet, or split a larger one, though splitting is imprecise.

Timing matters more than size past that point. The small dose taken at the right time does more than a large one taken carelessly.

More was never the answer with melatonin. The right answer is less, earlier, and matched to what your body already makes.