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Content: Studies consistently shows that only about one in three people worldwide can digest lactose beyond seven or eight years of age. Celiac.com Sponsor (A12): Celiacs who eat gluten can become lactose intolerant after the villi and microvilli in their small intestine become damaged, and can no longer intercept and break down lactose molecules. However, most people recover on a gluten-free diet. Once the damaged villi and microvilli to grow back, and the gut heals, the sensitivity to lactose often disappears. This can take time. In most people, full gut healing takes between six months and a year. In some cases the villi and microvilli damage can take up to two years to heal fully. In any case, once the gut heals, lactose intolerance issues should disappear. Also, most people who are lactose intolerant can eat goat and sheep products, such as milk, yogurt and cheeses, such as feta and pecorino Romano, without any problems.