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Stevens, Gretchen A., Ty Beal, Mduduzi N. N. Mbuya, et al. The Lancet Global Health, November 2022

New estimates of the global prevalence of deficiency in at least one of three micronutrients suggest 56 percent of preschool-aged children and 69 percent of non-pregnant women of reproductive age are affected. Three-quarters of these children live in South Asia, sub-Saharan Africa, and East Asia and the Pacific while 57 percent of these women live in East Asia and the Pacific and South Asia.