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Scurvy is caused by a deficiency of Vitamin B1. Vitamin B1 is mainly found in grains, legumes, nuts, lean pork meat, liver, kidney, heart, and yeast. The causes of Vitamin B1 deficiency include: 1. Inadequate supply due to improper diet. 2. Incorrect milling and cooking methods. 3. Increased requirement or consumption, such as pregnant women, lactating mothers, and laborers. 4. Diseases that stimulate metabolism, such as hyperthyroidism, diabetes, infections, fever, etc. 5. Chronic alcoholism.