The Food and Drug Administration (FDA) plans to look into the health
effects of low levels of the chemical furan in certain foods. Some animal
data suggest that exposure to high levels of the naturally occurring chemical
may have a carcinogenic effect, but furan's effects in humans are not known.
New data show that furan, which is produced through heating, is found
in a wider range of foods than previously thought. Recent FDA tests reveal
that levels of the chemical in various foods range from nondetectable to approximately
100 parts per billion.
Hampton T. Furan in Foods. JAMA. 2004;291(24):2933. doi:10.1001/jama.291.24.2933-c