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Harvard Health Letter

What is normal?

Published: November, 2008

The shifting boundaries of normal and healthy cholesterol levels, blood pressure, and other health indicators.

It seems that the definitions of normal, healthy levels of blood pressure, cholesterol, and other health indicators keep changing, so that increasing numbers of people are classified as being at risk and therefore in need of treatment. Yesterday's normal becomes today's needs-to-be-treated.

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Daily Health Tip

Memorize the warning signs of a stroke

The acronym FAST can help. F: Face drooping. Can the person smile? Is the smile uneven? A: Arm weakness. Is one arm weak or numb? If the person raises both arms, does one drift down? S: Speech difficulty. Is the person's speech slurred? Can they repeat simple sentences you give them? T: Time to call 911. If the person shows any of these symptoms, even if the symptoms go away, call 911. Check the time so you know when the symptoms began.

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What is normal?

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