Nutritional supplements
Learning Center
Thyroid disease: Can it affect a person's mood?
Thyroid disease can affect mood, but those symptoms are rarely the only evidence of thyroid disease.
Too much vitamin C: Is it harmful?
Vitamin C is an essential nutrient, but too much carries its own risks.
Uncircumcised penis: Is special care needed?
Know how to wash and care for your child's uncircumcised penis.
Unusual COVID-19 symptoms: What are they?
COVID-19 can cause a wide variety of symptoms, some more common than others. Learn about how COVID-19 can make you feel.
Vaginal dryness after menopause: How to treat it?
Low-dose estrogen therapy, vaginal moisturizers and vaginal lubricants are among treatments for this condition and the discomfort it causes.
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.
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 the difference between the two.
Vulvar varicosities during pregnancy: What can you do?
Vulvar varicosities can cause discomfort during pregnancy. Understand what causes this form of varicose veins and learn how to get relief.
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.
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