Caffeine is generally safe to drink up to 400 milligrams a day, according to the Food and Drug Administration (FDA). That's equivalent to about four or five cups of coffee. For the average person, ...

Major brands like Starbucks and Dunkin’ use the chemical methylene chloride to decaffeinate coffee, advocates say. Some brands make decaf coffee with methylene chloride. Advocates want the paint ...

Medically reviewed by Karina Tolentino, RD Key Takeaways Caffeinated coffee is more likely than decaffeinated coffee to help ...

Other factors, like muscle mass and genetics, also play a role. In Dr. Marcus’ clinical trial, he found that caffeinated ...