The American Heart Association (AHA) has clarified that most adults can safely consume up to 400 mg of caffeine daily, equivalent to five cups of coffee, without increasing cardiovascular risk, according to a new scientific statement published in its journal “Circulation” on July 20. This recommendation, authored by Dr. Gregory M. Marcus, a professor of medicine at the University of California, San Francisco School of Medicine and the associate chief of cardiology for research at the University of California, San Francisco Health, highlights the importance of how caffeine is consumed. Marcus is also the chair of the AHA’s scientific statement volunteer writing group that released the findings.
Black Coffee vs. Energy Drinks: Key Differences
The AHA’s statement underscores that the safety limit applies specifically to black coffee, as added sugars, syrups, and dairy can negate potential health benefits. In contrast, energy drinks and shots—often containing three to four times more caffeine per fluid ounce than coffee—may pose risks such as elevated blood pressure or irregular heart rhythms, the researchers noted. High doses of caffeine, such as those found in energy drinks including energy shots, may have harmful effects on the heart and should be avoided,
Marcus said.
Unfiltered coffee types, like espresso, French press, Turkish coffee or boiled coffee, may also raise “bad” cholesterol levels, while caffeinated beverages without added sugars were linked to lower risks of Type 2 diabetes, heart disease, stroke, heart failure and some irregular heart rhythms. The review also explored research on coffee’s impact on cholesterol, finding unfiltered coffee, such as espresso, French press, Turkish coffee or boiled coffee, contains a component that is associated with higher levels of “bad” cholesterol.
The AHA’s statement, published in its peer-reviewed journal, notes that while coffee is the main source of caffeine for most adults, tea, soda, and chocolate can also contribute to overall intake. Although research suggests that caffeine consumption may be associated with certain cardiovascular benefits for some people, it’s important to remember that there is no ‘one-size-fits-all’ strategy for safe caffeine consumption,
Marcus said. People can respond very differently to caffeine based on various factors, such as age, medications, underlying health conditions, genetics and how quickly their bodies metabolize it.
Caffeine Pouches and Teenage Consumption
While many brands say these products are intended only for adults, they’re still entering the teenage lexicon. They’re small, discreet and everywhere. Young people are obsessed with caffeine pouches,
a related article noted. These pouches are an alternative to coffee and energy drinks.
Individual Variability in Caffeine Response
The AHA emphasized that caffeine metabolism varies widely among individuals. The review also explored research on coffee’s impact on cholesterol, finding unfiltered coffee, such as espresso, French press, Turkish coffee or boiled coffee, contains a component that is associated with higher levels of “bad” cholesterol. The authors note that while coffee is the main source of caffeine for most adults, keep in mind that tea, soda and chocolate can also contribute to overall caffeine intake. More research is still needed on how caffeine from different sources affects different people, the authors added.
The AHA’s statement also highlights that the 400 mg threshold is a general guideline, not a universal rule, due to individual differences in caffeine response.
What to Watch Next
The AHA’s statement calls for more research on how different caffeine sources affect different people. The organization also noted that energy drinks remain a concern due to their high caffeine content and potential cardiac risks. The AHA’s scientific statement, published on July 20, underscores the need for continued evaluation of caffeine’s role in public health.
