Final answer:
Celiac disease damages small intestine microvilli, impairing nutrient absorption, and leading to vitamin deficiencies.
Step-by-step explanation:
Individuals with celiac disease often struggle with vitamin deficiencies due to a B)reduced absorption of nutrients in their small intestine. This happens because celiac disease triggers an immune response to gluten - a protein found in wheat, barley, rye, and some other grains. The immune reaction causes damage to microvilli in small intestines.
These microvilli are tiny, finger-like projections that increase the surface area of the small intestine and aid in the absorption of nutrients. However, when damaged, these microvilli cannot properly absorb nutrients, causing deficiencies.
The impaired nutrient absorption leads to problems like malnutrition, cramping, diarrhea, and, in the case of insufficient vitamin D and calcium absorption, potentially conditions like rickets in children and osteomalacia in adults.
Learn more about Celiac Disease and Nutrient Absorption