A colleague informed him of a startling trend: liver cancer was plaguing affluent Filipinos at a much higher rate than their
less - wealthy counterparts — a phenomenon that, despite a slew of other lifestyle differences, Campbell believed was linked to their higher intake of
animal protein.1 Bolstering his suspicions, Campbell also learned of a recent study from India showing that a high
protein intake spurred liver cancer in rats, while a low
protein intake seemed to prevent it.2 Intrigued by this gem of
little - known research, Campbell decided to investigate the role of nutrition in cancer growth himself — an endeavor that ended up lasting several decades and producing over one hundred publications (none of which pertained to Fight Club).3