In folk medicine, rosemary has been associated for centuries with having a good memory. But is it worth investigating whether it really has any powers, asks Dr Chris Van Tulleken. In scientific terms there are different kinds of memory.
There's past memory - your experiences and what you learned at school. There's present memory, which is your working minute-to-minute memory. And there's future memory or "remembering to remember".
This is for many of us the trickiest one. When it fails bad things happen - we forget to take our vital heart medicine or worse still to buy our spouse's birthday presents. It's the reason letters decompose in my back pocket over months even though I cycle past a postbox every day.
There are plenty of examples of people who have enormously improved their past memories, committing decks of cards to memory or whole new languages. But remembering to remember is more complicated. Like most people I would do almost anything for an improved future memory.