Coca-Cola has reigned for years as the world’s No. 1 brand, but last year both Apple and Google overtook it in Interbrand’s annual ranking. The first lady, Michelle Obama, is on a campaign against obesity, urging Americans to drink more water. Former Mayor Michael R. Bloomberg tried to ban sales of giant-size high-sugar soft drinks in New York City. And this week, the Food and Drug Administration proposed new food labels that would more prominently display grams of added sugar, including the high-fructose corn syrup used in Coca-Cola.