More Digestive Regularity and Better Hydration
Although caffeine can get things moving, it can sometimes make that process just a little too speedy, Kenney says. The substance increases peristalsis, the muscle contractions that keep food in transit through your digestive system, previous research suggests.
While that’s important, it can also contribute to loose stools and even diarrhea, and combined with caffeine’s diuretic effects, that may increase your risk of dehydration, and could contribute to that lack of full absorption for some micronutrients.
Better Workout Prep for Those With Cardiovascular Risks
Caffeine is a common ingredient in preworkout mixes because of its stimulant effects, but a study published in March 2019 in Medicine & Science in Sports & Exercise found that those with cardiovascular risk factors were at higher risk of blood clot formation while working out if they had caffeine before the activity. Risk factors for heart disease include high blood pressure, high cholesterol, smoking, and obesity, says lead researcher Paul Nagekirk, PhD, director of the Integrative Exercise Physiology Lab at Ball State University in Muncie, Indiana.
“The difficulty is that many people, especially young people, don’t tend to know their numbers with blood pressure and cholesterol,” he says. “Even if you think these are fine because you’re fit, it’s possible they could be high due to an inherited condition, for example.”