Final answer:
Some vitamins, especially fat-soluble vitamins, can accumulate in the body when taken in excessive amounts, leading to toxic effects on the body.
Step-by-step explanation:
Vitamins can have a toxic dose disease because some vitamins, especially fat-soluble vitamins, can accumulate in the body when taken in excessive amounts. When these vitamins accumulate to toxic levels, it can lead to various health issues.
For example, an excessive intake of vitamin A can be toxic to the liver, causing symptoms such as blurred vision, hair loss, and skin rash. Similarly, too much niacin can result in a peptic ulcer, hyperglycemia, dizziness, and gout.