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.
Experts recommend that you should limit your daily consumption to 200mg of caffeine a day. In coffee terms, this works out at about two cups of instant, or just one cup of filter coffee. This is assuming you are drinking from average sized coffee mugs, not the bucket-sized cups at your local coffee bar. The 200mg recommendation includes all of your caffeine sources, not just coffee.