Fitness basics
Learning Center
Valerian: A safe and effective herbal sleep aid?
Valerian — Can this sleep aid help you sleep better?
High cholesterol treatment: Does cinnamon lower cholesterol?
Can cinnamon lower cholesterol?
Do infrared saunas have any health benefits?
How is an infrared sauna different from a traditional sauna? Light provides the heat.
High-dose vitamin C: Can it kill cancer cells?
High-dose vitamin C has been touted by some as an effective alternative cancer treatment.
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
Natural remedies for depression: Are they effective?
For some people, certain herbal and dietary supplements seem to help with depression, but more studies are needed on their effectiveness and side effects.
L-arginine: Does it lower blood pressure?
This supplement may help some people lower their blood pressure. Learn who might benefit and who should stay away from it.
Probiotics and prebiotics: What you should know
Probiotics are foods or supplements that contain 'good' bacteria that might help treat or prevent illness. Should they be part of your diet?
Brain AVM (arteriovenous malformation)
Tangled blood vessels in the brain affect typical blood flow in this rare condition. Learn more.
Candida cleanse diet: What does it treat?
Candida cleanse diets that replace processed food with fresh foods improve health but don't necessarily stop yeast overgrowth.
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