Health NotesPosts
Posts
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'I Barely Slept, but My App Says 7 Hours' — Insomnia and Device-Recorded Sleep Time
2026.07.12
Insomnia is diagnosed by assessing difficulty falling or staying asleep and impaired daytime functioning, not the sleep duration shown in an app. Depending on the device, they may miss periods of wakefulness and report more sleep than actually occurred, while people with insomnia may feel they slept less than they did. An app display alone cannot determine whether someone has insomnia.
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How Accurate Is Your Smartwatch’s ‘Deep Sleep’ Score? Should a Low Score Worry You?
2026.07.12
A smartwatch estimates deep sleep from movement and heart-rate signals rather than measuring brain waves directly. Accuracy varies by device and sleep stage, and consumer sleep trackers cannot diagnose or rule out sleep disorders on their own. Robust evidence that artificially increasing deep sleep changes health outcomes is also still lacking.
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Even If You Don't Snore: Who Should Get Tested for Sleep Apnea
2026.06.05
Not snoring does not rule out sleep apnea. Learn which symptoms you may notice yourself, why body size alone is not enough to judge risk, and when to discuss screening and diagnostic testing with your doctor.
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Centrum Benefits and Side Effects: Does Multivitamin Use Extend Lifespan? (2026 Clinical Trial Evidence)
2026.04.29
Drawing on the 21,442-participant COSMOS trial and a meta-analysis pooling more than 5.5 million people, this piece weighs what Centrum and other multivitamins actually do for cognition and the pace of aging. They don't extend lifespan, and while the evidence is solid for adults over 60, it's only supportive for people in their 30s and 40s.
