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.
How much caffeine is too much? The U.S. Food and Drug Administration (FDA) and the International Food Information Council recommend healthy adults have no more than 400 milligrams of caffeine a day, which is about four cups of (regular) brewed coffee. Kristafor says one of his 12-ounce cups could add up to 702 mg of caffeine. So, yeah, thatâs a lot.