Mayo Clinic offers award-winning medical and health information and tools for healthy living.

The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, physics, botany and zoology. The collections stand at 5 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. Housed within the Library is one of the world's finest medical history collections of old (pre-1914) and rare medical texts, manuscripts, and incunabula.

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Dependable irritable bowel syndrome (IBS) causes, symptoms, support and treatment for sufferers, family and friends since 1987. An IBS community providing characteristics for diagnosis of symptoms and treatment, forums and chat rooms to talk about ibs, blogs, resource links, brochures, medical tests, book list, penpals, meetings, research studies and a list of medications.

Irritable bowel syndrome treatments described and reviewed, from drugs to alternative therapies. All written by irritable bowel syndrome sufferers, for irritable bowel syndrome sufferers.

Extensive knowledge base of medical information on symptoms, diagnosis, and misdiagnosis of more than 20,000 medical conditions. Research causes of your symptoms or research treatments for diseases.