11 Sep 2018 --- Shifting to a healthy diet is not only good for us, but it also saves a lot of precious fresh water, according to a new study by the JRC published in Nature Sustainability. Compared to existing diets, the water required to produce our food could be reduced by between 11 percent and 35 percent for healthy diets containing meat, 33 percent and 55 percent for healthy pescetarian diets and 35 percent and 55 percent for healthy vegetarian diets.