Focus with Vitamin C
After measuring levels of vitamin C in 214 healthy adults, aged 20 to 39, doctors asked the 46 participants with levels below 50 micromoles per liter of blood to take a placebo or 500 mg of vitamin C twice per day.
After four weeks, participants took the Stroop Color-Word Test, which asks participants to name the color of letters in a word, a slower process than simply reading. The test gauges cognitive flexibility, resistance to external influence, ability to focus, and creativity.
Those taking vitamin C had better attention and ability to focus exclusively on tasks, with fewer signs of fatigue compared to placebo.
Reference: European Journal of Nutrition; 2022, VOL. 61, NO. 1, 447-59