1 Heart-related lung problems. 2  Chest X-rays can show changes or problems in your lungs that stem from heart problems. 3  For instance, fluid in your lungs (pulmonary edema) can be a result of congestive heart failure.
A new report suggests that itâs generally safe for the average person to consume 400 milligrams of caffeine each a day. More than 90 percent of the worldâs population consumes caffeine in some form on a regular basis. The stimulant drug (yes, it is considered a drug) helps a person stay awake, alert and productive.
More than 90 percent of U.S. adults use caffeine regularly, the study says, and, on average, they consume about 200 mg per day. For healthy adults, the FDA says 400 mg a day is OK. But consuming much more than that can have dangerous, negative effects. And the milligrams add up quickly.