A group of Indian researchers had conducted a “gold standard” clinical trial, the kind that isolates one variable and performs a controlled experiment on it.1 The researchers had fed aflatoxin, a powerful carcinogen, to two groups of rats. One group was fed a 20 percent animal protein (casein) diet. The other group was protein deprived, ingesting only 5 percent of their calories from casein. The results? Every single 20 percent protein rat developed liver cancer or cancer precursor lesions. Not a single 5 percent protein rat did.
