Discussion
We developed a set of community based salt reduction interventions targeting home cooks and family members. This cluster randomised controlled trial showed that the intervention package not only effectively reduced the urinary sodium excretion by 336.8 mg/day (0.9 g/day salt reduction) but also lowered systolic blood pressure by 1.98 mm Hg and diastolic blood pressure by 1.05 mm Hg within one year. Salt related knowledge, attitude, and behaviours also improved significantly.Population level multicomponent salt reduction activities have the potential to reduce dietary salt intake.