Diet plans
Learning Center
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Blood pressure: Does it have a daily pattern?
Like many body functions, blood pressure has a daily pattern. Find out more.
Omega-6 fatty acids: Can they cause heart disease?
This essential fatty acid is found in certain foods and is recommended as part of a healthy diet.
Hand swelling during exercise: A concern?
This condition is a common problem, but rarely serious enough to disrupt your routine.
Mold allergy
Coughing, sneezing and itchy eyes often accompany this common allergy. Find out how to treat this condition and help keep it under control.
Swimmer's ear
The moist environment from water remaining in your ear after swimming or bathing can lead to this infection in the outer ear canal.
Cluster headache
These painful headaches cause severe pain on one side of the head and tend to occur in bouts called cluster periods.
Secondary infertility: Why does it happen?
Second pregnancies don't always come easily. Learn about possible causes for secondary infertility and when to seek professional help.
Sinus infection and toothache: Any connection?
Sometimes the cause of a toothache isn't a tooth problem, but a sinus problem.
Semen allergy: A cause of infertility?
Semen allergy, also called seminal plasma hypersensitivity, is a rare condition that can be easily misdiagnosed. Learn about symptoms and possible treatments.
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