When Pollan decided to write about caffeine, he gave it up — cold turkey. “I just couldn’t focus,” he says. “I was irritable. I lost confidence.” Caffeine reshapes the brain in surprising ways. — Read on www.npr.org/sections/health-shots/2020/02/10/803394030/michael-pollan-explains-caffeine-cravings-and-why-you-dont-have-to-quit