For its world-class care, the famed Mayo Clinic attracts patients from all around the world. Similarly, its website is a trusted, expert-driven resource that millions of people look to for health and medical information.

A symptom tracker, well-organized disease and condition information, medical and health suggestions, and the latest in medical science and research can all be found here. Unlike many other symptoms tracker websites, the Mayo Clinic provides sober, research-backed information that is less likely to cause worry than others.

Detailed information:

Focus: Medical and health info

Twitter: @MayoClinic

Website: mayoclinic.org

Facebook: facebook.com/MayoClinic

This is the American Heart Association's site for anything related to cardiovascular health. Heart.org, run by the American Heart Association (AHA), provides research-backed resources for people with heart disease and everyone interested in heart care. Heart.org addresses all aspects of heart care, including medicine, food, fitness, and lifestyle advice.

Quick-view pages like the heart attack and stroke symptoms page are a must-have resource, while more in-depth articles, recipes, workout routines, and disease-specific topics are informative, authoritative, and worth bookmarking for anyone experiencing or concerned about heart disease and other cardiac conditions.

Detailed information:

Focus: Heart health

Twitter: @American_Heart

Website: heart.org

Facebook: facebook.com/AmericanHeart

The National Institutes of Health, or NIH.org, is operated by the United States Department of Health and Human Services and is a reliable source for medical news and health updates.

The National Institutes of Health (NIH) is a terrific place to stay up to date on essential information from the CDC and other official channels, but it also has more practical resources, such as wellness checklists and health recommendations, that are backed up by the most recent research and medical expertise.

Detailed information:

Focus: Medical and health news

Twitter: @NIH

Website: nih.gov

Facebook: facebook.com/nih.gov

Dr. Andrew Weil is a well-known and recognizable voice in integrative and natural medicine. The smiling white-bearded face on the cover of his several best-selling books is the same face that greets you on his website, where you'll find an extensive library of health and wellness articles written in Dr. Weil's characteristic approachable style.

Dr. Weil's website covers almost every aspect of health, but he's especially good for identifying natural foods and vitamins to help with common ailments like headaches, flu, and gastrointestinal issues.

Detailed information:

Focus: Natural medicine and wellness

Twitter: @DrWeil

Website: drweil.com

Facebook: facebook.com/DrWeil

Psychology Today has been the leading journal for mental health news and information since 1967. The magazine's contributors are all psychologists, psychiatrists, academicians, and specialists in their fields, but it is aimed at a general audience and includes reader-friendly articles, advice blogs, and techniques that cover the vast area of mental health.

You should also look into Psychology Today's Find a Therapist directory, which can help you find licensed and experienced psychologists and psychiatrists in your region.

Detailed information:

Focus: Holistic health

Twitter: @PsychToday

Website: psychologytoday.com

Facebook: facebook.com/psychologytoday