Michael B. Fossel(born 1950, Greenwich, Connecticut) is a former professor of clinical medicine at Michigan State University and is the author of several books on aging, who is best known for his views on telomerase therapy as a possible treatment for cellular senescence.

Prior to graduating from medical school in 1981, he was awarded a National Science Foundation fellowship and taught at Stanford University.

[citation needed] A magisterial academic textbook by Fossel entitled Cells, Aging, and Human Disease was published in 2004 by Oxford University Press.

In 2015, he published "The Telomerase Revolution", which was lauded by both the Wall Street Journal and The London Times as one of the best science books of the year.

However, he is careful to qualify his advocacy of telomerase therapy as being a potential treatment for these conditions rather than a "cure for old age" and a panacea for age-related medical conditions, albeit a potential treatment that could radically extend the maximum human life span and reset the aging process in most people.