Vaseline, my favorite Petroleum Jelly

Is it really necessary to have a preferred brand of Petroleum Jelly? For me, yes because not all Petroleum Jelly products are created equal! Some really cheap and unknown Petroleum Jelly brands are not purified down to the core, and may contain traces of carcinogenic substances such as Polycyclic Aromatic Hydrocarbons or PAHs-better safe than poisoned! :p I did an extensive research on and