The FDA is looking into new rules that would encourage food and beverage companies to clearly disclose how much caffeine is in their products, making it easier for consumers to compare drinks and monitor their intake. The review comes as concerns grow over highly caffeinated beverages, following lawsuits, investigations, and a rise in reports of children being exposed to energy drinks. While any future guidance wouldn't be legally binding, health experts continue to recommend no more than 400 milligrams of caffeine a day for healthy adults, less than 200 milligrams during pregnancy, and no more than 100 milligrams daily for teenagers, with children discouraged from consuming caffeine altogether.