Nutritional supplements
Learning Center
Zinc for colds: The final word?
Everyone's heard of taking zinc for colds. But does it really work?
Wrist blood pressure monitors: Are they accurate?
Devices that measure blood pressure at the wrist may be an option for some people. Know how to position a wrist monitor properly.
What is wheatgrass? Why is it in my drink?
Wheatgrass is a popular addition to smoothies and other drinks. While it's a rich source of nutrients, it's not a disease cure-all.
What is reflexology?
Reflexology is gaining popularity as a stress reliever, but does it work?
What is meant by the term "heart age"?
Heart age is a way to understand your risk of a heart attack or stroke. By making healthier lifestyle choices, you can lower your heart age and your risk.
What is hot yoga?
Hot yoga, also known as Bikram yoga, is an intense form of yoga performed in a heated studio.
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Vitamin D deficiency: Can it cause high blood pressure?
Too little vitamin D is bad for the bones, but what about the heart? Learn how a low vitamin D level may affect blood pressure.
Vitamin D deficiency
What are the risks of too little vitamin D?
Valerian: A safe and effective herbal sleep aid?
Valerian — Can this sleep aid help you sleep better?
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