A randomized-controlled trial was conducted in adult 18-70 years old with hypertensive patients (SBP\>130 mmHg) in Uthaithani. Participants were randomized to intervention groups (education, reformulation, environmental change and used salt meter) and control group (standard education and treatment). Trial was followed up for 12 weeks. The primary objective was change in 24-hour urinary sodium excretion between groups and secondary objectives was change in systolic and diastolic blood pressure.
