the first clinical trial

May 2nd is international scurvy awareness day.

Here's a bit of history about limes, scurvy and the British navy.

Also the first clinical trial. 

Lind's major contribution to science was the first controlled clinical trial. In 1747, aboard the HMS Salisbury, Lind took twelve sailors suffering from scurvy and divided them into six pairs. Each pair received a different scurvy treatment. The two men who were given citrus fruit became well within six days and even helped to care for the other sailors. All of the other men remained ill.

https://library.missouri.edu/exhibits/food/lind.html