Potato samples and meal preparation
MAY
The iron-biofortified potato clone CIP311623.75 and the nonbiofortified commercial potato variety Peruanita were grown in Paucartambo, Pasco, Peru. The potatoes were harvested in May 2021 and were transported to Lima where they were prepared in June.Briefly, the potato tubers were washed under running water and boiled in 6 kg batches, completely covered in water, for 60 min after which the potatoes were peeled and mashed. The mash was stored at –20C° in plastic bags until the COVID restrictions allowed us to start the intervention. The potato meals were transported frozen from Lima to Huancavelica in 3 batches.The night before the consumption of test meals, the frozen potato meals were taken out of the freezer, left at room temperature (2°C) overnight, and warmed in a microwave oven before being served to the participants.