I Tried Vitamin D To Help Me Sleep. Does It Work?

This year, I’ll be trying sleeping tricks to see whether they actually improve my insomnia. Check back in on this series, Rest Assured, to see how I get on.

Because I have absolutely no trouble falling asleep, I didn’t realise for years that my 3am wakeups actually constituted a form of insomnia (sleep maintenance insomnia, to be precise). 

On average, I wake up in the middle of the night just under five times a week. I only return to sleep about a quarter of those times. 

So...