A randomized, non-blind design with three treatment groups (non-obese) or five groups (obese), including a no-treatment group in each weight stratum. Intervention methods were dietary only, and included sodium restriction, sodium restriction plus potassium supplementation (obese and non-obese), weight reduction, and weight reduction plus sodium restriction (obese only). This was a pilot study with measures of feasibility including recruitment success, dietary adherence, and blood pressure differences among the treatment groups.