What causes secondary lactase deficiency? Do dairy products have to be completely avoided?
What will be an ideal response?
Secondary lactase deficiency can be caused by injury to the small bowel, such as from an acute infection. The underlying condition should be treated, and often the elimination of lactose from the diet is not necessary at all, but milk products should definitely be resumed once the underlying condition has resolved. The concern with both primary and secondary lactase deficiency is to avoid the total elimination of dairy products from the diet when it may not be necessary, as these foods are important sources of calcium, vitamin D, and other nutrients.
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