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The Hidden Risks of Overdosing on Vitamins


Updated: May 24, 2025 18:02

Image Source: Times of India
While vitamins are essential for maintaining good health, excessive intake can lead to unexpected side effects. Many people assume that more is better, but certain vitamins can cause toxicity when consumed in high doses, leading to serious health complications.  
 
Key concerns  
- Fat-soluble vitamins such as A, D, E, and K are stored in the body and can accumulate to dangerous levels, potentially causing liver damage, bone weakness, and blood clotting issues.  
- Excessive vitamin A intake can lead to dizziness, nausea, and even birth defects in pregnant women.  
- High doses of vitamin D may result in calcium buildup, leading to kidney stones and cardiovascular problems.  
- Overconsumption of vitamin E has been linked to an increased risk of bleeding disorders.  
 
Water-soluble vitamins can also pose risks  
- Vitamin C, often taken in large amounts for immunity, can cause digestive distress and kidney stones when consumed excessively.  
- Vitamin B6 toxicity may lead to nerve damage, causing numbness and difficulty in movement.  
- Excessive niacin (vitamin B3) intake can result in liver damage and severe skin flushing.  
 
Safe supplementation practices  
- Stick to recommended daily allowances and consult a healthcare professional before taking high-dose supplements.  
- Be mindful of fortified foods, as they can contribute to excessive vitamin intake.  
- Understand that a balanced diet often provides sufficient nutrients without the need for additional supplementation.  
 
Sources: Healthline, WebMD, Verywell Health, EatingWell

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