A WSU study found that whether caffeine is absorbed through coffee or energy drinks, and regardless of temperature and rate of consumption, its effects are similar.

The study, published in April, cites concerns that because cold energy drinks can be consumed more quickly than hot coffee, they deliver a potentially harmful dose of caffeine.

However, according to the study, most caffeine problems are actually due to high doses in tablet or powder form, particularly in abuse situations and suicide attempts.

Contrary to popular opinion, the study found that the impact of energy drinks consumed quickly is not significantly different from that of hot coffee, and that hot coffee increased caffeine levels more than cold coffee when taken at the same rate.

Twelve men and 12 women between 18 and 30 years old completed the study, which used Red Bull and Folgers Classic Roast coffee at 160 mg caffeine doses, the standard amount in a 16-ounce energy drink and a cup of brew-house coffee.

The study did not account for caffeine mixed with other substances, energy drinks with other non-caffeine constituents, other brands of coffee, or beverages and supplements with higher concentrations of caffeine.

Reporting by Cody Cottier