Multivitamins, which, in the opinion of many experts, never did anything, are out. Vitamin D, probiotics and fish oil are in. That’s the word from the supplement fashion police, otherwise known as epidemiological researchers at Memorial Sloan Kettering Cancer Center in New York City. HealthDay reports their recent survey, which found that between 1999 and 2012, just over half of U.S.  adults said they took vitamins, minerals or some other type of dietary supplement. And while the number of supplement takers has remained constant, the supplements of choice have changed, and fewer people now take individual vitamins and minerals, as well as botanicals such as echinacea, ginseng and garlic extract. More people are going with vitamin D, omega-3 fatty acids and probiotics — apparently hoping to cultivate the kind of “good” bacteria that is said to benefit the digestive system. HealthDay reports that in 1999-2000, less than 2 percent of Americans used omega-3 fatty acids. That had risen to 13 percent by 2012.