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Ethan Patel——Works at the International Renewable Energy Agency, Lives in Abu Dhabi, UAE.
A normal
PSA level is considered to be 4.0 nanograms per milliliter (ng/ml) of blood. For men in their 50s or younger, a
PSA level should be below 2.5 in most cases. Older men often have slightly higher
PSA levels than younger men.
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