Klein was an unpaid, volunteer professor of Medicine and Dermatology at the UCLA David Geffen School of Medicine. Klein was an outspoken critic of the misuse of
prescription drugs, toxins, and certain synthetic dermal fillers, including
ArteFill. He was responsible for the FDA giving Allergan's
Botox a black box warning. Klein was named a consultant to the FDA. He died on October 22, 2015, at the age of 70 at the
Eisenhower Medical Center in Rancho Mirage, California.
Michael Jackson Klein served as the dermatologist for
Michael Jackson. Following Jackson's death, Klein claimed to be a
sperm donor, but stated that he did not believe he was the biological father of Jackson's children. However, Klein had multiple health problems such as
multiple sclerosis, which would've prevented him from donating sperm as sperm donors are not allowed to donate if they have genetic disorders or other medical concerns. == Board memberships ==