There is also some laboratory evidence that vitamin E deficiency can cause male infertility.

However, there are two additional cases with less laboratory evidence being reported by local investigators.

Although clinical features resembled a drug overdose, some of the laboratory evidence suggested hypoglycemia.

Still, there is a body of laboratory evidence that vitamin D may have tumor-thwarting potential.

Among cases to be studied were three high-profile convictions, including one for murder, based on faulty laboratory evidence.

In 2001, researchers Anderson and Green claimed to have found laboratory evidence of suppression.

"Our experience - and the laboratory evidence is abundant - is that humans have a limited capacity for attention," he says.

But over the past 20 years or so, some laboratory evidence has suggested that vitamin D may block the growth of malignant tumors.

Prof Carter described the laboratory evidence as really dramatic but said it is too early to say whether the same effect can be produced in patients.

I had been optimistic, based on the laboratory evidence, that suppression of inflammation would be useful in Alzheimer's patients.