One trial found it to have an effect above placebo.

A single trial of vitamin D did not find benefit.

On May 3, 2005 the last trial ended with no one found guilty of the bombing.

For example, a 1982 trial of 175 patients found tumor size had increased in all but one patient.

However, two large clinical trials found no benefits at all.

A smaller trial from Canada with 318 women found similar results.

The trial also found a high incidence of side effects, including nausea and back pain.

A similar trial with elderly humans also found significant cognitive improvement.

A "special trial" conducted in May 2012 found the ship fit for the deployment.