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MedlinePlus is a service of the National Library of Medicine (NLM), the world's largest medical library, which is part of the National Institutes of Health (NIH). It was built as an online health information resource for patients and their families and friends.

MedlinePlus presents high-quality, easy to understand, relevant health and wellness information that is trusted.

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Vitamin E - National Library of Medicine

Vitamins are substances that your body needs to grow and develop normally. Vitamin E is an antioxidant. It plays a role in your immune system and metabolic processes. ...

Smoking - National Library of Medicine

... much tobacco as an entire pack of cigarettes. E-cigarettes often look like cigarettes, but they work ... They are battery-operated smoking devices. Using an e-cigarette is called vaping. Not much is known ...

Hepatitis - National Library of Medicine

... viruses -- hepatitis viruses A, B, C, D, and E. In the United States, A, B, and C ... is viral hepatitis spread? Hepatitis A and hepatitis E usually spread through contact with food or water ...

Antioxidants - National Library of Medicine

... Lutein Lycopene Selenium Vitamin A Vitamin C Vitamin E Vegetables and fruits are rich sources of antioxidants. ... lung cancer in smokers. High doses of vitamin E may increase risks of prostate cancer and one ...

Anemia - National Library of Medicine

If you have anemia, your blood does not carry enough oxygen to the rest of your body. The most common cause of anemia is not having enough iron. Your body ...