 <unk> , which are potentially carcinogenic in humans , are believed to be present in a substance used to improve elasticity in latex condoms . A 2001 review stated that humans regularly receive 1 @,@ 000 to 10 @,@ 000 times greater <unk> exposure from food and tobacco than from condom use and concluded that the risk of cancer from condom use is very low . However , a 2004 study in Germany detected <unk> in 29 out of 32 condom brands tested , and concluded that exposure from condoms might exceed the exposure from food by <unk> to 3 @-@ fold . 
