Americans are drinking more caffeinated beverages than ever before, but Rutgers researchers found one group that tops the charts in caffeine consumption: adult smokers with mental illness. In a study ...

Researchers found out that adult smokers with mental illness consume the most caffeine in the United States. Aside from this, people with bipolar disorder and schizophrenia are at the highest risk of ...

"For some people, one cup of coffee can make them tired, while others can drink three cups of coffee and feel fine." ...

Consumer Reports analyzed caffeine levels in both instant coffees and takeout brews — and found they can vary widely. In some ...