Nutritional supplements
Learning Center
Phantosmia: What causes olfactory hallucinations?
Phantosmia is often due to a head injury or upper respiratory infection.
Hypertensive crisis: What are the symptoms?
A sudden rise in blood pressure over 180/120 mm Hg is considered a medical emergency, or crisis. It can lead to a stroke. Know the symptoms.
Thin skin? Added protection helps
Fragile or thin skin is a fairly common problem, especially in older adults.
Lack of sleep: Can it make you sick?
Lack of sleep can affect your immune system. Here's what you need to know.
What is thirdhand smoke, and why is it a concern?
Tobacco smoke creates toxic residue that clings to walls, carpets, clothes and other surfaces.
Tinnitus causes: Could my antidepressant be the culprit?
Ringing in the ears, also known as tinnitus, has many possible causes, such as taking antidepressants.
Rheumatoid arthritis: Can it affect the eyes?
Although rheumatoid arthritis is primarily a joint disease, it occasionally affects the eyes.
Too much vitamin C: Is it harmful?
Vitamin C is an essential nutrient, but too much carries its own risks.
High-dose flu vaccines: How are they different from other flu vaccines?
High-dose flu vaccines are flu vaccines for older people.
Probiotics and prebiotics: What you should know
Probiotics are foods or supplements that contain 'good' bacteria that might help treat or prevent illness. Should they be part of your diet?
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