evidence: Salt has long been vilified as the harbinger of hypertension. However, as research into the condition has delved deeper, it is becoming clear that the story is more complex. The latest study in this arena goes some way toward absolving sodium. [...] However, a new batch of studies are bringing this guideline into question, and researchers are now asking whether the relationship between hypertension and salt is so clear cut. [...] As more studies conclude that sodium’s role in hypertension is less vital than once thought, dietary recommendations are sure to change in line with the findings. This changing field of nutrition science is one to watch.