Nutritional supplements
Learning Center
Vicks VapoRub: An effective nasal decongestant?
Find out why you should not use this ointment to ease a stuffy nose during a cold.
Vitamin D and MS: Is there any connection?
Some research suggests that vitamin D may reduce the risk of multiple sclerosis (MS).
Vitamin D deficiency
What are the risks of too little vitamin D?
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Vitamins for MS: Do supplements make a difference?
Can vitamin supplements improve MS symptoms?
Warm-mist versus cool-mist humidifier: Which is better for a cold?
Warm-mist and cool-mist humidifiers are equally effective in humidifying the air.
Weightlifting: Bad for your blood pressure?
Although beneficial in the long term, weightlifting can cause temporary, sometimes dramatic, increases in blood pressure.
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.
Wheezing in children: Could it be asthma?
Wheezing in children may be a sign of asthma — but not always.
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