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.
Drinking 400 milligrams of caffeine (the equivalent of four 8-ounce cups of coffee) is considered safe by most physicians. However, energy drinks can contain as much as 1200 mgs of caffeine â an amount three times higher than what is generally considered acceptable. This overload of caffeine is then âturbo-chargedâ with the addition of natural stimulants like Guarana and Yerba Mate in certain energy drinks.