Introduction<br />Vitamins are essential for the body's health, but exceeding the normal limit may cause serious harm, especially when taken as dietary supplements without medical supervision.<br />When Do Vitamins Become Harmful?<br />Fat-soluble vitamins (A, D, E, K) are stored in the body, and their accumulation may lead to toxicity.<br />Water-soluble vitamins (like B and C) are excreted in urine, but high doses can also cause side effects.<br />Examples of Overdose Harm:<br />Vitamin A: Causes headaches, dry skin, and liver problems.<br />Vitamin D: Leads to high calcium levels and kidney damage.<br />Vitamin B6: May cause nerve damage.<br />Vitamin C: Causes diarrhea and kidney stones when overused.<br />Tips to Avoid Harm:<br />Do not take supplements without need.<br />Stick to the recommended daily dose.<br />Consult your doctor when using vitamins for extended periods.<br />Conclusion<br />Vitamins are beneficial when needed, but excess can cause real harm. Moderation is the key to health.<br />AL_mustaqbal University is the first university in Iraq