date:Feb 25, 2014
al studies and seven controlled trials.
Observational studies show what happens when people have chosen their own diets and stuck with them, often for years, Yokoyama said. Controlled trials are different - a diet is given to people who had not tried it before, and that will show the effect of beginning a new way of eating.
Together the studies included close to 22,000 people.
The researchers found that in the observational studies, people who had been eating a vegetarian diet had an average