Potato samples and meal preparation
MAY
The regular non-biofortified commercial potato variety “Amarilla” (yellow) and the zinc-biofortified yellow potato CIP311623.75 were grown in Cacara, Paucartambo, Pasco, Perú. The potatoes were harvested in May 2021 and were transported to Lima where the test meals were prepared in June–July.For the preparation of the potato meals, the potatoes were washed and scrubbed using a brush to remove any earth that might contaminate the potato. The potatoes were boiled for ∼60 min, after that those potatoes were peeled (including removal of the eyes), mashed, and homogenized. Portions of 250 g were aliquoted into labeled plastic bags. This procedure was undertaken before the beginning of the study and all the prepared cooked potato meals were stored at −18°C in individually labeled packets. Finally, the frozen, prepared potatoes were transported from Lima to Huancavelica.