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NEW YORK - SEPTEMBER 27: French fries are displayed on a table in a McDonald's restaurant September 27, 2006 in New York City. The city health department is considering a ban on artificial trans fatty acids in the city's restaurants. (Photo illustration by Chris Hondros/Getty Images)

Going a little thin up top fellas? Rockin’ that baseball hat?  Time to hit the drive-thru.

Japanese researchers say a chemical they put in the oil to cook the french fries at McDonalds has promoted hair growth in mice.

Newsweek says it’s called dimethylpolysiloxane and it’s used to keep the oil from frothing.

Source: Newsweek