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  • Forget Weight—Muscle Mass Is the Real Longevity Metric.
    Longevity & Metabolic Health

    Forget Weight—Muscle Mass Is the Real Longevity Metric.

    Blood Sugar & Metabolism, Exercise, Longevity, Women’s Health
    Robin Berzin MD
    November 4, 2025

    We’ve all been trained to chase a lower number on the scale. The truth? Weight is the wrong metric for healthy aging. Build muscle mass. Read more

  • If You Only Fix One Thing for Longevity, Make It Your Mitochondria.
    Longevity & Metabolic Health

    If You Only Fix One Thing for Longevity, Make It Your Mitochondria.

    Blood Sugar & Metabolism, Exercise, Longevity, Supplements
    Robin Berzin MD
    January 6, 2026

    Mitochondria are the powerhouses of the cells. They’re also the biological foundation of aging. When they’re thriving, you’re thriving. Read more

  • How Much Does Vigorous Exercise Really Matter?
    Longevity & Metabolic Health

    How Much Does Vigorous Exercise Really Matter?

    Blood Sugar & Metabolism, Exercise, Longevity
    Robin Berzin MD
    January 13, 2026

    Just 10 minutes of vigorous exercise may provide equal—or better—longevity benefits than an hour of low-intensity exercise. Read more

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Robin Berzin MD

Robin Berzin MD is the founder of Parsley Health and your guide on the journey to being well.

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