A random sample of 828 participants aged 18–64 years were recruit- ed from the selected workplaces (workplace A: 100 (70% response rate), workplace B: 224 (70% response rate), workplace C: 392 (60% response rate), workplace D: 112 (91% response rate)). The number of employees recruited per workplace reflected the difference in company size. The sample was powered to detect a decrease in BMI by 1 kg/m2 and a 2 g average fall in dietary salt intake between the control and intervention groups post-delivery of the interventions. Eligible employees were permanent, full-time employees who purchased and consumed at least one daily meal at work. A wide variety of hot and cold meal options were available for employees during working hours. Many food options were served using a buffet-style so employees' managed the frequency and quantity of their own food items.