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Oliver J Private Blood

Understand the biology behind your weight

Weight Loss

£99+ £25 blood draw per visit, however many tests you book11 biomarkersResults in 5–7 working days

Weight is shaped by more than willpower. Thyroid hormones set your metabolic pace, blood sugar and insulin resistance affect how you store energy, cortisol responds to stress, and testosterone and inflammation each play their part. This panel brings these threads together, offering a clearer view of the biology working with or against your efforts.

It is particularly useful before starting a weight-loss plan, or while following a medically supported programme, including the newer weight-loss medications. Establishing your baseline across thyroid, metabolism, stress and inflammation helps you and your clinician understand where your effort is best directed and track how your body responds over the weeks ahead.

Your sample is a single venous draw taken in our private Leigh-on-Sea clinic and analysed by an accredited UK laboratory, with a doctor’s report within 5–7 working days. Because it includes a lipid screen and blood sugar, a fasted morning appointment sets a reliable baseline you can revisit as your programme progresses.

Preparation: A morning appointment is preferred. As this panel includes a lipid screen and blood sugar, fast for 8–12 hours beforehand, drinking only water. Cortisol is also best measured in the morning, so an early draw gives the clearest picture.

Inside this panel

11 biomarkers in 4 areas

Worth considering if

  • Difficulty losing weight despite effort
  • Unexplained weight gain
  • Persistent tiredness or low energy
  • Strong cravings or a fluctuating appetite
  • Feeling stressed or run down
  • Weight settling around the middle

Who this test suits

  • Anyone struggling to lose weight despite diet and exercise
  • People starting or following a weight-loss medication programme
  • Those wanting to understand the metabolic factors behind their weight
  • Anyone seeking a baseline before making lifestyle changes
Thyroid & metabolism3 markers
  • TSH (thyroid-stimulating hormone)
  • Free T4 (thyroxine)
  • HbA1c
Stress & sex hormones2 markers
  • Cortisol
  • Testosterone
Lipid screen4 markers
  • Total Cholesterol
  • HDL Cholesterol
  • Non-HDL Cholesterol
  • Triglycerides
Inflammation & iron2 markers
  • High-sensitivity CRP (hs-CRP)
  • Iron
  1. 1

    Book your time

    Choose a slot that suits you. Appointments only, so the clinic is yours.

  2. 2

    A gentle draw

    Demi takes your venous sample in minutes, in a calm private room.

  3. 3

    Doctor-reviewed report

    Your results arrive within 5–7 working days, explained marker by marker.

About this test

  • It is well suited to it. Measuring thyroid, blood sugar, cortisol and lipids before or during a programme lets you and your clinician judge how well it is working and make more informed decisions.

  • Weight is influenced by more than diet. Thyroid and cortisol affect metabolism and appetite, testosterone plays a role in how you build and burn energy, and inflammation can quietly work against progress, so seeing them together helps.

  • Yes. Because the panel includes cholesterol and blood sugar, fasting for 8–12 hours with only water gives the most accurate results. A morning appointment makes this easiest.