The U.S. Food and Drug Administration advises most adults to stay below 400 mg of caffeine a day.
“It’s important for women who are pregnant or breastfeeding to consult with a doctor before consuming these caffeine alternatives,” Rachel Bult, a dietitian at OSF HealthCare, said.
While caffeine can provide a temporary energy boost, it can also come with downsides. Caffeine is addictive.
“Moderate caffeine consumption – around 400 milligrams or less is generally considered safe but should be consumed mindfully as it can affect people differently,” Rachel said.
Too much caffeine may cause side effects like:
Anxiety and nervousness
Digestive issues
Fatigue and sluggishness from caffeine crash
Headaches
Increased heart rate and blood pressure
Jitteriness