Christofer Bäcklin had gained 5 pounds, and it was all because of the muffins. Swallowing one last bite of crumbly cake, the 31-year-old resident of Uppsala, Sweden, closed his eyes and exhaled with relief. It was his 49th day and his 160th baked good (total tally: 40 chocolate, 40 vanilla, 40 lemon, 18 strawberry, 16 apple, 5 cinnamon, and 1 very unfortunate tropical flavor), and it marked the end of a bizarre, vaguely masochistic experiment. “Let’s just say I won’t be interested in muffins again for a while,” says the medical PhD student, who had been forcing them down after every meal, every day for 7 weeks. One of his peers had quit the study, unable to stomach one more crumb, but Bäcklin never considered dropping out.
“The world needs…