Director Mark Wexler sets off on a global journey to explore the essence of aging and the possibility of achieving immortality. But whose guidance should he follow? Is it the 94-year-old fitness icon Jack LaLanne who holds the key, or perhaps Buster, a 101-year-old marathon runner who enjoys smoking and drinking beer? Wexler also considers the perspectives of futurist Ray Kurzweil, a laughter yoga practitioner, and even an elderly adult film star. In this captivating documentary, Wexler delves into the insights of these intriguingly unconventional individuals, as well as experts in health, fitness, and longevity, challenging our perceptions of youth and aging with a blend of humor and poignancy. Initially intended as a study on life-extension, “How To Live Forever” transforms into a profound exploration of what truly imbues life with meaning.