Side effects of taking too many vitamins

While vitamins are important for good health, consuming too much can have negative effects. Nausea is a common side effect, along with stomach cramps and diarrhea. Certain vitamins can cause more severe symptoms, like dizziness and liver damage. Vitamin D can lead to weakness and kidney stones. Vitamins B6 and B3 can damage nerves and the liver, respectively. Excessive iron intake can cause nausea and organ damage.