A new study finds that children are getting sick a lot, thanks to a surprising new source.

Colorful laundry detergent packets, which have grown in popularity in recent years for their convenience, are being increasingly consumed by children, according to a Nationwide Children’s Hospital statement.

The report showed a 17 percent increase from 2013 through 2014 in the number of calls to poison control centers from young children eating the attractively colored but potentially deadly packets. A total of 22,000 children largely under age 3 were exposed to laundry packets.

In some cases, children stopped breathing and went into a coma or cardiac arrest. A total of two children died.

Laundry detergent packets are actually more toxic than more traditional types of detergents. The chemical composition and concentration of detergent is different in packets and may result in a higher toxicity, according to the statement.

Packets with liquid rather than granules are more likely to result in a child being hospitalized if he or she consumes a packet.

“The study, published online today in Pediatrics, found that from January 2013 through December 2014 Poison Control Centers in the U.S. received 62,254 calls related to laundry and dishwasher detergent exposures among children younger than 6 years old,” the statement reads. “The study included calls about both traditional detergent and detergent packets and found that detergent packets accounted for 60 percent of all calls. Almost half (45 percent) of the calls for exposure to laundry detergent packets were referred to a health care facility for evaluation and treatment, significantly more than calls related to exposures to traditional laundry detergent (17 percent), traditional dishwasher detergent (four percent), or dishwasher detergent packets (five percent).”