Diagnostic Testing Service

Thyroxine, T4 (ECB001)

Specimen type



  • Reference range: 0.8-5.0 μg/dL
  • Thyroxine (T4) hormone in dogs is crucial for regulating metabolism, growth, and energy levels.
  • Evaluating total T4 (TT4) is effective for ruling out hypothyroidism or monitoring dogs on levothyroxine supplementation.
  • Hypothyroidism is a common condition in dogs that can lead to unexplained weight gain, skin and coat issues, as well as behavioral changes and reduced energy.