become more difficult to control,” he said.
In terms of amounts of caffeine, an average cup of home-brewed coffee has about 100 mg, compared with 250 mg in a tall Starbucks coffee and as much as 400 mg in energy drinks. A can of Mountain Dew has 55 mg while a can of Coca-Cola has 35 mg.
Many vitamin and sports or nutritional supplements also contain caffeine, but many people don’t think to check the labels of those products, Silvis added.
More information
The U.S. Food and Drug Administration has more on caffeine.
