- Vitality drinks and stimulant dietary supplements could also be related to considerably increased dangers of significant coronary heart issues in younger adults, together with an 11-fold improve in cardiac arrest and a 4.5-fold increased threat of coronary heart assault, based on preliminary analysis.
- Some vitality drinks include as much as 3 times as a lot caffeine per fluid ounce as brewed espresso, plus further stimulants like guarana and taurine that may additional improve blood strain and coronary heart price.
- Most wholesome adults can safely eat as much as 400 milligrams of caffeine every day, however folks with coronary heart situations, irregular heartbeats, or household historical past of coronary heart illness ought to speak with a healthcare skilled earlier than consuming vitality drinks or stimulant merchandise.
New analysis means that caffeinated vitality drinks and stimulant dietary supplements are related to considerably increased dangers of significant coronary heart issues, together with cardiac arrest and coronary heart assault in younger adults.
Nonetheless, the outcomes spotlight regarding cardiovascular results of those standard merchandise, significantly amongst adults below 35 who eat them recurrently.
“These merchandise are marketed as on a regular basis pick-me-ups and offered subsequent to soda and bottled water, so most individuals assume they carry no actual threat,” research creator
“For a lot of wholesome folks, if these merchandise are consumed sometimes, the danger might be small. Nevertheless, people who eat vitality drinks or different stimulant-containing dietary supplements recurrently can rapidly exceed the really helpful every day restrict for caffeine, so it’s necessary for folks to know that there could also be a threat of cardiovascular hurt with these merchandise,” Samayamanthula continued.
Researchers from the College of Virginia College of Medication analyzed 28,345 experiences submitted to the Meals and Drug Administration (FDA) between 2017 and 2025.
Of those, 854 concerned caffeinated vitality drinks or stimulant dietary supplements, whereas the remaining experiences concerned non-stimulant merchandise.
In contrast with non-stimulant merchandise, cardiac arrest was reported roughly 11 instances extra typically with vitality drinks and stimulant dietary supplements. Coronary heart assaults have been reported 4.5 instances extra typically, whereas ventricular arrhythmias and palpitations have been reported about 4 instances extra steadily.
Almost 45% of heart-related experiences concerned adults ages 18 to 34.
“Our findings assist the case for extra systematic security monitoring of caffeine- and stimulant-containing merchandise. As well as, healthcare professionals ought to bear in mind to ask their youthful sufferers who’ve palpitations, chest ache or fainting spells in the event that they lately or recurrently eat these merchandise,” Samayamanthula mentioned.
“Though there are organic the reason why that connection could possibly be doable, the research doesn’t show that caffeine merchandise trigger these occasions, as a result of different components could have influenced the outcomes discovered on this evaluation,” Marcus mentioned in a
“Extra analysis is required to know whether or not these stimulant merchandise are actually liable for the reported heart-related occasions.”
Cheng-Han Chen, MD, board licensed interventional heart specialist and medical director of the Structural Coronary heart Program at MemorialCare Saddleback Medical Middle in Laguna Hills, CA, mentioned the findings, though regarding, aren’t shocking. Chen wasn’t concerned within the research.
“We all know that vitality drinks can have vital results on the cardiovascular system, primarily due to their stimulant properties,” he instructed Healthline.
“Caffeine can improve blood strain and coronary heart price, whereas different components, corresponding to guarana and taurine, could additional contribute to cardiovascular stimulation and elevated stress hormone ranges. What is especially regarding is the potential for these merchandise to set off critical issues, together with irregular coronary heart rhythms, particularly in folks with underlying cardiovascular situations.”
Chen agreed that occasional vitality drink consumption is unlikely to have long-term penalties for coronary heart well being in most wholesome people. Nevertheless, he mentioned that “frequent or extreme consumption can probably improve the danger of hypertension and cardiac arrhythmias.”
An AHA scientific assertion printed in July 2026 notes that as much as 400 milligrams of caffeine daily is usually thought of protected for many wholesome adults. That’s roughly equal to 4 or 5 8-ounce cups of brewed espresso, relying on the way it’s ready.
Nevertheless, some vitality drinks include as much as 3 times as a lot caffeine per fluid ounce as brewed espresso.
Sure vitality drinks might also include stimulants, corresponding to guarana, yerba mate, theobromine, synephrine, and yohimbine.
These components could compound caffeine’s results on the cardiovascular system.
“Caffeine stimulates the cardiovascular system, primarily by rising sympathetic nervous system exercise. This could trigger the guts to beat quicker, increase blood strain, and improve the workload on the guts,” Chen mentioned.
“Vitality drinks could include further stimulants, corresponding to guarana and taurine, which may additional improve blood strain and stress hormone ranges. With extreme consumption, these results can turn out to be extra pronounced and probably intervene with the guts’s regular electrical exercise, rising the danger of irregular coronary heart rhythms. Individuals with underlying cardiovascular situations, significantly hypertension or a predisposition to arrhythmias, could also be particularly weak to those results.”
Different analysis has echoed these considerations. A 2025 review means that high-volume vitality drink consumption can extend the guts’s QTc interval, improve blood strain, and lift coronary heart price past the consequences of caffeine alone.
“There may be rising concern concerning the cardiovascular results of vitality drinks and stimulant-containing dietary supplements, significantly amongst youthful adults,” Chen mentioned.
“One problem is that youthful people could not acknowledge that these merchandise can have vital results on their coronary heart and blood strain, particularly when consumed steadily or together with different caffeinated merchandise.”
Younger adults accounted for a considerable portion of the FDA experiences included within the research, highlighting potential cardiovascular considerations for this age group.
Individuals with current coronary heart situations, a historical past of irregular coronary heart rhythms, or heightened caffeine sensitivity could face further dangers. These with undiagnosed genetic coronary heart situations might also be weak.
A 2024 study recognized circumstances of sudden cardiac arrest occurring shortly after vitality drink consumption, significantly amongst folks with underlying inherited coronary heart situations.
“As a heart specialist, I’m significantly involved about individuals who could have underlying cardiovascular situations that haven’t but been recognized,” Chen mentioned.
“Extreme stimulant consumption can probably set off signs corresponding to palpitations, chest discomfort, and lightheadedness. In prone people, it might additionally improve the danger of extra critical issues, together with irregular coronary heart rhythms.”
Moreover, combining vitality drinks with strenuous train or alcohol could introduce further cardiovascular dangers.
The findings recommend an affiliation between vitality drinks, stimulant dietary supplements, and reported cardiovascular occasions, however they’re preliminary and don’t set up trigger and impact.
The FDA database additionally relied on voluntary adverse-event experiences, which means some occasions could by no means be reported, whereas others could obtain disproportionate consideration.
Researchers additionally don’t but know the way many individuals consumed these merchandise with out experiencing any issues. With out this variable, the experiences can’t set up precise threat.
Different components, together with underlying well being situations, drugs, and way of life habits, might also affect the outcomes. Extra systematic analysis and managed scientific trials are wanted.
For many wholesome adults, consuming as much as 400 milligrams of caffeine per day is usually thought of protected.
Nevertheless, Chen famous that particular person tolerance for caffeine could differ, and folks with underlying cardiovascular situations, significantly hypertension or irregular coronary heart rhythms, could must restrict or keep away from caffeine altogether.
“Vitality drinks can differ significantly of their caffeine content material and serving sizes,” Chen mentioned.
“Relying on the product, a single can could include anyplace from 80 to 300 milligrams of caffeine. Because of this consuming even one or two vitality drinks can put somebody near or above the really helpful every day restrict, significantly when mixed with espresso, tea, or different caffeinated dietary supplements.”
Search emergency medical consideration in the event you expertise chest ache, significantly if it’s accompanied by shortness of breath, fainting, or different signs of a doable coronary heart assault.
In case you dwell with a coronary heart situation, ask your physician about your every day caffeine consumption to find out whether or not you must in the reduction of.
Based on Chen, warning indicators of extreme stimulant consumption could embrace:
- coronary heart palpitations
- chest ache
- lightheadedness
“Relying on the severity of those signs, medical consideration could also be essential,” he mentioned.
Nonetheless, most individuals could not want to surrender caffeine completely. Monitoring your habits may assist shield your coronary heart well being. This will likely embrace:
- Monitoring your consumption: Rely caffeine from espresso, tea, vitality drinks, pre-workout merchandise, and dietary supplements.
- Studying ingredient labels: Test complete caffeine content material and search for further stimulants, together with guarana and synephrine.
- Understanding your limits: The 400-milligram every day guideline applies to most wholesome adults, not everybody. Particular person sensitivity varies, and a few folks could expertise signs at a lot decrease quantities.
- Contemplating your well being historical past: Speak with a healthcare skilled earlier than utilizing stimulant merchandise in case you have a coronary heart situation, irregular heartbeat, or private or household historical past of coronary heart illness.
“I encourage folks to learn product labels rigorously and pay attention to their complete every day caffeine consumption,” Chen mentioned. “I significantly advocate that individuals with underlying cardiovascular situations keep away from vitality drinks.”
