Jason Fung is a Canadian nephrologist, meaning his medical specialty is the kidneys, with a particular focus on metabolic health, insulin, and nutrition science. That background is exactly why The Cancer Code spends so much time connecting cancer to diet, blood sugar, and insulin levels, a lens that's somewhat unusual for a book about cancer but reflects where his own clinical expertise lies. Fung is probably best known for his earlier work on fasting and low carbohydrate approaches to managing type 2 diabetes and obesity, including his widely read books The Obesity Code and The Complete Guide to Fasting. The Cancer Code, published in 2020, extends that same interest in metabolism into a broader, more historical look at how our understanding of cancer itself has evolved, and it stands as one of the more comprehensive and up to date overviews of cancer research written for a general audience.
