Tiredness and fatigueResults expected within 2 working days If you've been feeling persistently tired or low on energy, our Tiredness & Fatigue Blood Test can provide valuable insights into some common factors that may contribute to these symptoms. What Does This Test Measure? This test assesses key health markers that are often associated with low energy levels, including: Vitamin D levels: Essential for energy, mood, and overall well being. Thyroid function: Thyroid