10+ Conspiracy Theories That Turned Out to be True

Sugar, not fat, is what’s really hurting your heart. That was British scientist John Yudkin’s warning in the 1960s and 70s, and he was mocked for it. Some wondered if the sugar industry was quietly shaping the science. For decades, nobody could prove it.

Old industry letters, uncovered by researcher Cristin Kearns and published in 2016, told the story. In 1967, a sugar group had secretly paid Harvard scientists to write a major review blaming fat and going easy on sugar. The low-fat thinking it pushed shaped diets for decades.