*[[Bisphenol A]] (BPA), [[Bisphenol S]] (BPS), and [[Bisphenol F]] (BPF) - some studies find BPA carcinogenic,<ref>http://blogs.edf.org/health/2014/02/21/is-bpa-a-carcinogen/</ref> others do not.<ref>https://toxnet.nlm.nih.gov/cpdb/chempages/BISPHENOL%20A.html</ref> BPS and BPF are very similar, and so are suspected by some to have similar health effects, if any.