Maybe you’ve heard blood type matters for transfusions—but did you know it might also affect your risk of having a stroke before age 60? According to a 2022 meta-analysis, by University of Maryland School of Medicine (UMSOM) researchers, people with blood type A have a modestly higher risk of what experts call early-onset ischemic stroke. Here’s the lowdown — what the study found, what it doesn’t mean, and what you can do about it. Researchers pooled data from 48 genetic studies involving nearly 17,000 stroke patients (all under age 60) and almost 600,000 control participants who never had a stroke. Here’s what the researchers found: The study didn’t definitively pin down why type A has this edge when it comes to stroke risk, but there are some good clues: Blood clot

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