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RDW: The blood marker nobody knows (that predicts mortality)
Health

RDW: The blood marker nobody knows (that predicts mortality)

RDW is hidden in your blood count but predicts mortality better than many expensive tests. Discover what it is, why each +1% RDW increases risk by 14%, and how to improve it.

#how-to #faq #RDW #blood-tests

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Blood oxygen on Apple Watch: Is it really useful for sleep apnea?
Health

Blood oxygen on Apple Watch: Is it really useful for sleep apnea?

Apple Watch sleep apnea alerts use the accelerometer, not SpO2. Learn what blood oxygen can and cannot show at night, and which sleep metrics matter.

#apple-watch #sleep-apnea #blood-oxygen
HRV: What is heart rate variability and how to improve it
Health

HRV: What is heart rate variability and how to improve it

Complete guide to HRV: what it is, why it matters, normal values by age, and 7 science-based strategies to improve it. Discover how to monitor it.

#how-to #faq #hrv