I asked 8 researchers why the science of nutrition is so messy. Here’s what they said. – Vox

Why (almost) everything you know about food is wrong

There was a time, in the distant past, when studying nutrition was a relatively simple science. In 1747, a Scottish doctor named James Lind wanted to figure out why so many sailors got scurvy, a disease that leaves sufferers exhausted and anemic, with bloody gums and missing teeth.