Symptoms vary depending on the specific vitamin involved. For instance, hypervitaminosis A can cause symptoms such as nausea, dizziness, blurred vision, and even liver damage. In severe cases, it can lead to increased intracranial pressure and coma. On the other hand, symptoms of hypervitaminosis D include hypercalcemia, which can result in nausea, weakness, and kidney stones. Chronic toxicity can lead to calcification of soft tissues and renal failure.
