A friend complains of blurred vision, cravings for sweets, weakness, and excessive thirst and urination. These symptoms are suggestive of:

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The symptoms described are classic signs of diabetes. Blurred vision can occur due to high blood sugar levels affecting the eyes, while excessive thirst and urination are symptoms of high glucose levels. Weakness may also be present due to the body's inability to use glucose for energy. Cravings for sweets may be the body's way of trying to increase blood sugar levels. Lactose intolerance and fasting do not typically cause these symptoms. Hypoglycemia (low blood sugar) may cause weakness and excessive thirst, but not blurred vision and cravings for sweets.

A Friend Complains of Blurred Vision, Cravings for Sweets, Weakness