CAFFEINE

This study looked at whether drinking coffee after abdominal surgery helps the intestines start working again sooner. 174 adults who had laparoscopic or open surgery were given either regular coffee, decaf coffee, or warm water three times a day. The main goal was to see if a lar…

This study compared two types of caffeine—extended-release and immediate-release—in 36 healthy adults after they slept less than 5 hours. Researchers measured mood, alertness, and side effects like jitters and anxiety over 7 hours. The goal was to see if the extended-release vers…

This study tested whether giving caffeine to drink before a planned C-section could prevent a dangerous drop in blood pressure caused by spinal anesthesia. 90 full-term pregnant women took part. The goal was to see if this simple, safe approach could reduce the need for emergency…

This study looked at whether drinking caffeine (about 3 mg per kg of body weight) helps trained climbers perform better. Thirteen healthy adults who climb regularly took part. The results showed that caffeine did not improve pull-up strength, grip endurance, or other climbing-rel…

This study looked at how long healthy men chew caffeinated gum affects how quickly caffeine gets into their blood. Thirty men chewed gum with 300 mg of caffeine for either 5 or 10 minutes on separate days. Researchers measured caffeine levels in blood samples over three hours to …

This study looked at whether taking dietary nitrate (like from beetroot juice) can lessen the stress that caffeine and cold put on the heart and blood vessels. Researchers measured blood pressure and artery function in 24 healthy adults. The goal was to see if a simple supplement…

This study looked at how a dose of caffeine (6mg per kg of body weight) affects the way healthy adults perform exercises like running, squatting, and jumping. Researchers measured things like knee angles and step rates both when participants were fresh and when they were tired. T…