According to researchers from the University of South Florida. Scientists report shoppers who sip on a complimentary cup of coffee before shopping ended up spending 50 percent more money and buying 30 percent more items than their non-caffeinated counterparts.
Caffeine, as a powerful stimulant, releases dopamine in the brain, which excites the mind and the body. This leads to a higher energetic state, which in turn enhances impulsivity and decreases self-control.
As a result, caffeine intake leads to shopping impulsivity in terms of a higher number of items purchased and greater spending.