Now you may ask, what kind of person would willingly inject a non-biodegradable rubber particle into their face so that collagen might form around it? Surely the idea of that is absurd now, as it probably will also be similarly noted in future generations. Just as we think Victorians were insane to utilise mercury, lead and arsenic in their cosmetics, future generations will brand our era in a similar way for the widespread use of silicones. There are also silicones mixed with bovine and pig collagen as part of dermatologic practices that can cause severe reactions, such as necrosis (death) of the skin. This happens because human DNA does not recognise the foreign DNA of other species such as bovine (cow) and pig and non-biodegradable materials such as silicone and the body's immune system treats it as a foreign body, and this begins the long process of side effects that could ultimately end up with infected or deadened skin tissue. However, toxic treatments of this variety are a multi-billion dollar business around the world and most doctors are not warning patients of the dangers of these types of cosmetic treatments due to the global marketing of these products as beauty enhancers.