School age children may be an important part of bringing down stroke rates, as first ever research in China published in the BMJ today shows that an app can help families cut salt consumption, which is tied to poor cardiovascular health. Researchers found that adult participants saw an 8 percent decline in salt consumption, accompanied by a positive fall in systolic blood pressure. These results are contextually noteworthy given their significant public health learnings: it was conducted in a real-world setting; it can be scaled up; and the overall difficulty of changing dietary salt behavior. Broader research indicates that salt reduction at those levels would avert 250,000 stroke and heart events per year in China alone.