Nutritional supplements
Learning Center
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
What is hot yoga?
Hot yoga, also known as Bikram yoga, is an intense form of yoga performed in a heated studio.
What is reflexology?
Reflexology is gaining popularity as a stress reliever, but does it work?
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.
Yeast infection in men: How can I tell if I have one?
Yeast infections can occur in men, causing inflammation of the penis (balanitis). Learn what signs and symptoms could mean you have a yeast infection.
Zinc for colds: The final word?
Everyone's heard of taking zinc for colds. But does it really work?
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