“A must-read for parents, teachers and any healthcare provider for children, Let Them Eat Dirt takes you inside the inside tract of a child’s gut, and shows you how to give kids the best immune start early in life.”—William Sears, M.D, co-author, The Baby Book Our over-sanitized world threatens children’s health, but parents can change their environment into one where they’ll thrive. Babies and young kids are being raised in surroundings that are increasingly cleaner, more