Health
Vitamin D Supplements: A Reality Check on Who Actually Benefits
Large trials with more than 30,000 participants found vitamin D pills do little for people who are not deficient, reshaping decades of assumptions.
Jan 20, 2026
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13 stories for“AI provenance”
Health
Zone 2 Cardio Versus VO2 Max: Sorting the Training Trend From the Evidence
VO2 max strongly predicts longevity, but the evidence that slow, low-intensity Zone 2 training is the best way to raise it is weaker than the trend suggests.
Jan 15, 2025
