 Linear programming, LP, was used to develop dietary guidelines for First Nation communities in Canada. LP is a mathematical technique that combines economic and cultural factors into one model to optimise dietary intake while keeping costs low. However, LP did not allow for complete achievement of all nutrients, suggesting that supplementation may be necessary. Furthermore, LP diets were not feasible without additional measures such as reducing market food costs or supporting First Nation people in traditional food harvesting. This article was authored by Louise Johnson Down, Noreen Willows, Tiffany Kenny and others.