Accepted manuscript Purified diet reduces intestinal IgA and alters the microbiota accordingly Published online by Cambridge University Press: 17 December 2025 Show author details Masao Goto* Affiliation: Division of Food Function Research, Institute of Food Research, NARO, Tsukuba, Japan Jun Watanabe Affiliation: Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan Motoi Tamura Affiliation: Division of Food Function Research, Institute of Food Research, NARO, Tsukuba,...