Glycols (group): Used as a humectant (emulsifier/moisturizer), that
can be from animal or vegetable, natural or synthetic.
In most cases it is used as a cheap glycerine substitute.
Propylene glycol did cause liver abnormalities and
kidney damage in laboratory animals. Diethylene
glycol and carbitol are considered toxic. Ethylene
glycol is a suspected bladder carcinogen. The FDA
cautions manufacturers that glycols may cause adverse
reactions in users. They have been shown to be carcinogenic,
mutagenic, and toxic.
