This paper by Humphries et al. discusses elasticities of specific foods in Peru with a discussion of micronutrients. Here's the link: https://www.researchgate.net/publication/267873207_Households_across_All_Income_Quintiles_Especially_the_Poorest_Increased_Animal_Source_Food_Expenditures_Substantially_during_Recent_Peruvian_Economic_Growth
Article Households across All Income Quintiles, Especially the Poore...