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Cells

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chili peppers

HOT STUFF  Capsaicin, the stuff that gives chili peppers their heat, relieves pain by a previously unknown process.

Wisdom Teeth

Stem cells from the pulp of extracted wisdom teeth, like those above, could provide a viable therapy for corneal blindness, researchers posit.

blood donor

ROLL IT UP  It can take months to get iron levels up to par after donating blood, but supplements help.

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