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.
Healthy Adults. A safe range for daily caffeine intake is between 200 to 300 milligrams for healthy adults. This is equal to approximately two to four cups of brewed coffee. No specific amount of caffeine per day can be recommended, as every individual reacts differently to the effects of caffeine.