Recent research has brought coffee’s impact on heart health into the spotlight, particularly how caffeine affects the cardiovascular system. A key question remains: How much caffeine is too much?

A review of multiple studies provides new insights. Some suggest that caffeine may support vascular health and lower the risk of conditions like type 2 diabetes, while others warn that excessive caffeine could raise the risk of stroke. Coffee, a daily staple for millions, is often consumed to boost alertness and combat fatigue, but its potential heart benefits make it a subject of increasing interest.

A recent study published on October 9 found that caffeine may improve blood vessel health, especially in individuals with lupus, a condition linked to a higher risk of cardiovascular issues. Another study from September highlighted that moderate coffee consumption—around 200-300 mg of caffeine daily—could help reduce the risk of type 2 diabetes, heart disease, and stroke by enhancing insulin sensitivity and fat metabolism.

However, there are concerns about overconsumption. Research presented in August revealed that consuming 400 mg or more of caffeine daily, whether through coffee, tea, or energy drinks, could lead to increased heart rates and higher blood pressure, which may elevate the risk of cardiovascular disease, even in healthy individuals.

On the subject of stroke, a study published in September found that while drinking more than four cups of coffee daily could raise stroke risk, moderate coffee consumption or drinking black tea in moderation might reduce the risk.

While coffee has been associated with various health benefits, moderation is key. Too much caffeine can strain the cardiovascular system, but moderate intake may offer protective effects against several chronic diseases.