What if a simple blood test could forecast when Alzheimer’s symptoms might begin—years before they appear? A new study in Nature Medicine suggests that science is getting uncomfortably close to answering that question. Here’s what it means, and why it quietly changes how we think about time, health, and living well.

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Good news for your morning ritual: moderate caffeinated coffee or tea is linked to better cognitive health later in life. Here’s the fun, no-hype takeaway—and how to use it wisely.

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