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Tests & Procedures

Vitamin D and MS: Is there any connection?

Some research suggests that vitamin D may reduce the risk of multiple sclerosis (MS).

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Vitamin D deficiency

What are the risks of not having enough of this vitamin?

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Vitamin D deficiency: Can it cause high blood pressure?

Too little vitamin D is bad for the bones, but what about the heart? Learn…

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Vitamin D for babies: Are supplements needed?

A Mayo Clinic specialist explains why, when and how to give your baby vitamin D.

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Vitamin D toxicity: What if you get too much?

Understand the risks of taking high doses of this vitamin in supplement form.

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Vitamin deficiency anemia

A lack of folate and vitamin B-12 can cause red blood cells to become too…

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Vitamin E

Find out how this supplement might affect brain health and the possible risks of taking…

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Vitamins and supplements for fatty liver disease (MASLD)

Certain vitamins and supplements may help manage MASLD, also called NAFLD or fatty liver disease.…

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Vitamins for MS: Do supplements make a difference?

Can vitamin supplements improve MS symptoms?

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Vitiligo

Learn more about this condition in which your skin loses pigment cells, resulting in very…

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VLDL cholesterol: Is it harmful?

Like LDL cholesterol, this cholesterol is considered a type of "bad" cholesterol.

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Vocal cord dysfunction: Is it a type of asthma?

Vocal cord dysfunction and asthma cause similar symptoms, but they're not the same. Find out…

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Vocal cord paralysis

Find out more about this condition that happens when nerve signals that control the voice…

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Voice disorders

Learn more about the causes of common voice disorders, such as laryngitis and granuloma, and…

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Vomiting blood

Vomiting blood can be a symptom of a number of serious conditions. Find out what…

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Von Willebrand disease

Learn more about the symptoms, causes, diagnosis and treatment of this inherited bleeding condition that…

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Vulvar cancer

Learn about this rare cancer that forms on the skin that surrounds the urethra and…

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Vulvar varicosities during pregnancy: What can you do?

Vulvar varicosities can cause discomfort during pregnancy. Understand what causes this form of varicose veins…

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vulvodinia

Learn about pain, burning and irritation of the vaginal area that doesn’t have a clear…

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Waldenstrom macroglobulinemia

Learn about this rare type of white blood cell cancer. Treatments include chemotherapy, targeted therapy,…

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Walking: Is it enough for weight loss?

Walking and a healthy diet can put you on the path to weight management.

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Walking: Make it count with activity trackers

If walking is your main form of physical activity, see how activity trackers can help…

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Walking pneumonia: What does it mean?

Walking pneumonia is a mild bacterial infection that resembles a cold. It usually does not…

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Walking: Trim your waistline, improve your health

Walking can be an ideal low-impact exercise. Get the most from your walking routine.

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Warfarin diet: What foods should I avoid?

Certain foods and drinks may affect how the blood thinner warfarin works. Know which foods…

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Warfarin side effects: Watch for interactions

This common treatment for blood clots may cause concerning side effects. Know which medicines interact…

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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.

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Warrior 1

Try this simple yoga pose.

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Water after meals: Does it disturb digestion?

Drinking plenty of water helps keep your digestive system on track.

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Water breaking: Understand this sign of labor

Learn how to tell this sign of labor and what do next.

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