How Much Caffeine Is Legal? Depends on the Label
Values shown are current and proposed federal caffeine thresholds, in milligrams, that apply to food and beverage products in the US. Notably absent from this chart: there is no federal caffeine limit at all for energy drinks classified as dietary supplements, the single largest gap this chart is meant to illustrate. Every other threshold shown here, whether already in law or currently proposed in Congress, simply doesn't apply once a product is labeled a supplement instead of a food.