The study was funded by Merck & Co. and Miller has received consulting fees from drug company Pfizer Inc.
The authors will be releasing comparable data for women in the near future, they said.
When to start panicking over hair loss? Miller counsels men who lose more than 50 hairs a day (as counted in the 60-second period) to check with their physician.
"The hair acts like a window to the inside of the body," he said. "If there's something going on inside the body that is not right, for example, low thyroid output or low iron, your hair can react by shedding more. So if you notice that you're shedding a lot of hair on the 60-second hair count, it would be worthwhile to be evaluated by physician to rule out underlying medical causes."
Sudden changes in the amount of hair you lose should also be evaluated, he said.
More information
Visit the American Academy of Family Physicians for more on hair loss.
SOURCES: Jeffrey J. Miller, M.D., department of dermatology, Penn State College of Medicine, Hershey, Penn.; Doris Day, M.D., attending physician in dermatology, Lenox Hill Hospital, New York City; June 2008, Archives of Dermatology
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