New York's senior Senator is sounding the alarm on those popular at-home DNA kits.

Chuck Schumer says customers may unknowingly put their genetic information at risk of being sold to third parties.

Companies like My Heritage, 23-and-me, and Ancestry DNA sell kits for people to learn more about their ancestry.

"These are the kits where you swab your cheek or maybe spit into a little vial send it back to a company and in return they're unravel your DNA," Schumer said. "There are no prohibitions and many companies say that they can still sell your information to other companies."

Schumer is calling on the Federal Trade Commission to consider setting privacy standards on companies that produce the kits.

The senator's warning comes days after all three companies slashed prices on the kits for the holiday season.