Top offenders include hormone and endocrine disruptors (parabens, phthalates, chemical sunscreens like avobenzone and
oxybenzone), suspected and known carcinogens (certain preservatives, formaldehyde releasers), and «fragrance,» the most opaque «ingredient» of all,
since it is basically a blanket term under which companies can hide any other ingredients they wish, without ever disclosing what they are (in the US this is perfectly legal).