Virtually all commercial sources of urea are synthesized from synthetic ammonia, which is synthesized from from air (aerial nitrogen) and natural gas or air and petroleum distillates.http://www.materials.addr.com/nitrogen.shtmlhttp://www.materials.addr.com/urethane.shtml
Diazolindinyl urea and Imidazolidinyl urea are common ingredients in cosmetics, emmoliants, hair care products. I don't know what they are except that they are other chemicals compounded with urea. Urea is produced in enormous quantities for making plastics, and plant food. I could easily spread 10 pounds of urea on a 2000 square foot garden so imagine how much farmers might use on 1000 acres. Only tiny amounts of diazolindinyl urea would be used in cosmetics.
Urea is naturally present in the urine of all mammals. Birds produce uric acid, instead. Urea is a waste product of protein metabolism. It is dumped into the blood, then separated out by the kidneys. It is the characterisitc protein of urine, discovered by someone taking a hard look at urine, and therefore named after urine. 100 years ago, urine was the source of urea. After that, Haber Process ammonia became the starting point for producing commercial urea. The fact that it was named after urine does not mean that commercial urea is made from urine. It is not. Nor is lactic acid made from milk, as Peta would have you believe. It just isn't. It can be, but it isn't. Unless you are talking about the lactic acid that gives sour cream its tart taste. But since that is naturally present in sour cream, it would not be listed as an ingredient of sour cream.
Basicly what that means is if you see the word urea in the ingredient list of a product, it would be made from air and fossil fuel. If you bought a pound a kidney pie, it would contain natural urea, but you would not see the word urea in the ingredient list, because the urea would be a natural constituent of the kidney, rather than an ingredient used in making the pie, and therefore would not be be listed separately from "kidney."
Peta has people all confused about this. Yes, urea in your product could be from a natural source -- but if it was, it wouldn't be on the ingredient list. They have people thinking that if it is listed in the ingredient list, it could be from either natural or synthetic sources. This is simply not true. If you see it in the ingredient list, it came from air and fossil fuels.
Jen's right, they can either be animal derived or synthetic.
Yes, Jen is right, it can
be either animal derived or synthetic, but as a practical matter, it never seems to be animal derived. There is just no reason for manufacturers to save animal urine and chemically extract urea from it, if (nearly odorless) urea obtained from synthetic ammonia is astonishing plentiful and cheap.