Beauty has become remarkably good at dealing with the morning after.

There is a cream for tired-looking eyes, a mask for dullness, something cooling for puffiness and a concealer specifically designed to make four hours look suspiciously like eight. Some of them are very good.

None of them changes the night before.

Sleep shows.

Not always dramatically. Not equally on everyone. And certainly not because one late night has suddenly aged you.

But there is evidence that when sleep is restricted, the face notices.