The replies varied from pragmatic to puzzling, but few contained evidence.
Lembit Opik argued - in an admirably bold deviation from accepted medical practice - that taxpayers should pay for treatments until they are shown to fail, rather than the other way around. "The onus is less on homeopathy to prove itself than on its detractors to prove it necessarily does not work," he said.
Harry Cohen joined him at the more eccentric end of the spectrum by implying that conventional medical treatments were improperly tested (he would not say which ones) and referring to Prince Charles as someone "who has made a very strong case" for homeopathy.
Some emails bounced and fewer than half the MPs replied. However, many responses were perfectly reasonable. John Hemming spoke for many when he said: "Even if you take the perspective that it only acts like a psychological treatment, then it is effective."