The Short Version
Large meta-analyses of prospective cohort studies consistently find that drinking 3–5 cups of coffee per day is *associated* with the lowest observed cardiovascular disease risk — but the claim's causal framing ("reduces the risk") overstates what observational evidence can establish. Residual confounding, variation in cup size and caffeine content, individual genetic differences, and inconsistent findings for specific endpoints like coronary heart disease all represent material omissions. The direction of the evidence is favorable, but the certainty implied by the claim is not warranted.