We're bombarded online by adverts for lotions and pills that promise to halt hair loss – or even help to grow it back. For BBC Radio 4's Sliced Bread, presenter Greg Foot tries to get to the ...

It is not my usual habitat. But I was making a Radio 4 documentary on a subject close to my heart: grey hair and why most of us are so keen to cover it up. And I had come to interview the ...