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Free Testosterone Calculator — with Bioavailable Levels

Free Testosterone Calculator

Calculate free and bioavailable testosterone levels

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How it works: Enter your total testosterone, SHBG, and albumin levels to calculate free and bioavailable testosterone using the Vermeulen equation.

Tips

  • Free T: 1-3% of total testosterone
  • Bioavailable T: 30-50% of total testosterone
  • SHBG binds testosterone tightly
  • Albumin binds testosterone loosely

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