The "loss of youth" or ageing process is responsible for increasing the risk of individuals to many diseases including cancer, Parkinson's, Alzheimer's, and others. As a result, in recent years, many high net worth individuals have donated large amounts of their money towards initiatives towards scientific research into the ageing process itself or therapies to slow or reverse the ageing process.[14] These people include Jeff Bezos, Ray Kurzweil, Peter Thiel,[15] Aubrey de Grey, Larry Ellison, Sergey Brin, Dmitry Itskov, Paul Gallen,[16] and Mark Zuckerberg.[17]