Does it slow down ageing? Or are we being exploited by a multi-billion pound industry?

Could her comments instil a new sense of confidence in those using the drugs and quieten the critics?

It follows a meeting between the families and Baroness Amos, who will chair the review.

Manufacturers who do not make products healthier within 18 months may face action, the government says.

So you think you eat enough fibre? You probably don't. Here's what to do about it.