According to a new, small study conducted by New Zealand’s University of Otago, common sugars can affect the way your brain works and hinder cognitive ability.
Researchers studied the cognitive performance of 49 people who consumed drinks containing either glucose, sucrose (table sugar), fructose (fruit sugar), or sucralose (artificial sweetener). The participants were tested on response times, arithmetic, and Stroop interference, which is a psychological test that measures cognitive processing.
After analyzing their performances, it was determined that those who consumed glucose or sucrose performed worse than those who consumed fructose or sucralose.
“Our study suggests that the ‘sugar coma’ — with regards to glucose — is indeed a real phenomenon, where levels of attention seem to decline after consumption of glucose-containing sugar,” study author Mei Peng told PsyPost.