One of them is saw palmetto and that is used by some men to stop prostate enlargement, which I understand happens as men get older, their prostate enlarges and it becomes quite uncomfortable and difficult to urinate.

NPR: Slate's Medical Examiner: Doubts on Supplements

"At this stage then it becomes acutely difficult, if not quite impossible, to set a budget and precept which is acceptable without causing a severe level of disappointment within the police service, difficulties amongst our partners and anger from the public that we exist to serve, " Mr Michael said.

BBC: Alun Michael