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Inadequate secretion of intrinsic factor, resulting from lesions that destroy the gastric mucosa (which can be caused by ingestion of corrosives, extensive tumors, and conditions associated with gastric atrophy, such as multiple sclerosis, certain endocrine disorders, iron deficiency, and subtotal gastrectomy) Structural lesions leading to vitamin B 12 deficiency, including regional ileitis, ileal reactions, and malignancies Competition for vitamin B 12 by intestinal parasites or bacteria
Additionally, vitamin D plays a crucial role in modulating the immune response, and maintaining sufficient levels can help prevent infections and autoimmune diseases
Nonetheless, it retains some biological activities associated with HGH, such as stimulating cartilage metabolism and potentially influencing chondrocyte function
Levels should be in the normal or high-normal range if supplementation is adequate
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