Nutrition Facts with Dr. Greger

What’s Taurine and Why Do We Care? (Part 1)

Mar 19, 2026
A deep dive into taurine: what it is, how our bodies make it, and why it shows up in energy drinks. Discussion of its antioxidant and muscle roles and surprising links to aging. Animal studies suggesting lifespan and healthspan benefits are highlighted, along with limits of current human evidence.
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INSIGHT

Taurine Is Made Not Just Eaten

  • Taurine is a nonessential free amino acid our bodies synthesize and store in high amounts, especially in eye, brain, kidney, and reproductive tissues.
  • Michael Greger notes we make multiple synthesis pathways and about one-fifth of a pound of taurine is in a 200 lb person, signaling physiological importance.
ANECDOTE

Where Taurine Got Its Name

  • The name taurine comes from Latin taurus after it was isolated from ox bile in 1827, decades before discovery in humans.
  • Greger shares a quirky anecdote about encountering 'taurine surgery' papers, which actually referred to bullfighting injury surgery.
INSIGHT

Taurine's Diverse Biological Roles

  • Taurine serves roles beyond proteins: antioxidant activity against specific radicals and involvement in muscle energy production.
  • Greger highlights concentrated levels in brain and muscles, which likely explain its inclusion in energy drinks despite mixed benefits.
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