Redken Extreme Anti-Snap Leave-in Treatment - reviewed and rejected
One of the culprits could be Arginine HCl. Arginine is an amino acid, but arginine hydrochloride is listed in the Cosmetic Database as a neurotoxin (although I couldn't find the studies cited) and, according to the Material Safety Data Sheet, is hazardous if in contact with the skin (this is at a pure concentration). Polyacrylamide is a polymer that is formed from units of acrylamide, a known neurotoxin. However, Polyacrylamide itself is not considered to be toxic, but is a controversial ingredient because of its potential ability to secrete acrylamide, according to Wikipedia. Although allowed by the FDA, concentrations used in cosmetics are limited.
There are several laureths in this product. The number (eg laureth-230 refers to the level of viscocity. However, there is some research that suggests that the higher the number, the more likely it is to cause irritation. Oleth-10 can be an irritant, increase the penetration of other products and be contaminated with carcinogens. Then there is a couple of parabens and phenoxyethanol at number three in the ingredients list.
The few good things - wheat amino acids, taurine (an antioxidant) and soy protein - don't really stand a chance.
Water (aqua), Cyclopentasiloxane, Phenoxyethanol, Polyacrylamide, Dimethiconol, C13-14 Isoparaffin, Laureth 23, Laureth 4, Laureth 7, Methylparaben, Disodium EDTA, Ethylparaben, PPG-5-Ceteth-20, Hydrolyzed Soy Protein, Wheat Amino Acids, Arginine HCl, Taurine, Oleth 10, Disodium Cocoamphodipropionate, Lecithin, Hydroxypropyl Trimonium Hydrolyzed Wheat Protein, Phosphoric Acid, 2 Oleamido 1, 3 Octadecanediol, Trehalose.