Participants
Twenty six adults from 13 families, two from each including the usual cook, were recruited from each community for outcome evaluation. Eligible people were aged between 18 and 75 years and were home cooks and family members who ate homemade meals at least four times every week. If more than one family member in a family agreed to participate in the outcome assessments, the spouse of the home cook or a family member of the opposite sex to the home cook would be selected first. Participants resided in the community for more than six months and had no relocation plans for the next 24 months. We excluded anyone who was pregnant or lactating or could not collect or refused to collect 24 hour urine.