What a Health Optimisation Blood Test Actually Tells You About Your Health
Most people only get bloods done when something is already wrong. By then, small imbalances have often had years to compound — low-grade inflammation, creeping insulin resistance, a slowly declining thyroid, a hormone profile that quietly shifted a decade ago.
The Health Optimisation Blood Test is built for the opposite approach. It’s a 67-biomarker panel designed to give you a full internal picture before symptoms force the conversation — so you and your clinician can act on data, not guesswork.
This guide explains what the test measures, what each group of markers is used to assess, and who tends to benefit most. All ranges quoted below reflect current UK guidance from the NHS and NICE.
Why 67 biomarkers, not 7
A standard GP blood test typically covers a narrow slice — enough to rule out obvious disease, rarely enough to explain how you feel. Fatigue, brain fog, stubborn weight, poor recovery, low libido and mood changes usually have a physiological signature. Detecting that signature reliably needs enough markers, tested together, to see relationships between systems.
The Health Optimisation panel groups markers across nine functional areas, so a GMC-registered doctor can interpret them in context rather than in isolation. If you’re new to private testing, our Health & Wellness hub gives an overview of the full range.
1. Full haematology and blood health
Includes red cells, white cells, haemoglobin, platelets, MCV, MCH and haematocrit — the markers used to assess oxygen-carrying capacity, immune status and recovery.
Persistently low haemoglobin or ferritin is a well-recognised cause of tiredness, breathlessness on exertion and reduced exercise tolerance (NHS: Iron deficiency anaemia). Changes in white cell subsets can be an early sign of infection or chronic inflammation.
2. Liver function
Your liver drives detoxification, hormone clearance and metabolism. The panel measures ALT, AST, GGT, ALP, bilirubin and albumin — a full liver function profile.
Elevated GGT is one of the earliest laboratory signals of metabolic stress from alcohol, certain medications or non-alcoholic fatty liver disease, which is estimated to affect up to one in three UK adults. Raised ALT and AST can appear well before conventional liver disease is diagnosed.
3. Kidney function
Creatinine, urea, eGFR and cystatin C are the markers used to estimate how efficiently your kidneys are filtering blood.
Chronic kidney disease is largely silent in its early stages. Current UK guidance recommends periodic eGFR monitoring in adults at increased risk, including those with hypertension, diabetes or cardiovascular disease.
4. Cardiovascular and cholesterol markers
A full lipid panel — total cholesterol, LDL, HDL, triglycerides and the HDL:LDL ratio — plus inflammatory markers including high-sensitivity CRP (hs-CRP) and homocysteine.
The relationship between LDL, HDL and triglycerides carries more information than any single number. Two people with an identical total cholesterol reading can have very different cardiovascular risk profiles once you look at particle balance and inflammation.
5. Metabolic and blood sugar health
HbA1c (average blood glucose over roughly three months) and fasting glucose.
Under NICE guidance, an HbA1c of 42–47 mmol/mol indicates non-diabetic hyperglycaemia — the pre-diabetes window in which lifestyle change has the greatest impact on preventing progression to type 2 diabetes (NICE NG28). Most people in this range have no symptoms — which is exactly why tracking it matters.
6. Full thyroid panel
TSH, Free T3 and Free T4, with thyroid antibodies where clinically relevant.
Standard NHS thyroid testing often begins and ends with TSH, which can appear within range while peripheral T3 activity is impaired. A full panel gives a more complete picture and is often the difference between a helpful and an unhelpful investigation of fatigue, low mood, weight change or hair thinning. For a thyroid-only assessment, see our Thyroid Blood Test.
7. Sex hormones
- For men: total testosterone, free testosterone, SHBG, oestradiol — also available separately in our Male Hormone Check.
- For women: oestradiol, progesterone, LH, FSH, prolactin — interpreted in the context of cycle phase or menopausal status. See also our Female Hormone Check and Menopause Panel.
Sex hormones influence energy, mood, libido, body composition, sleep and cognition. Baseline testing provides a personal reference point for tracking changes over time, particularly through perimenopause, andropause or hormone therapy.
8. Vitamins, minerals and nutritional status
Vitamin D, vitamin B12, folate, ferritin, iron studies and magnesium.
Deficiencies here are common in the UK. UK guidance recommends that all adults consider a daily 10 microgram vitamin D supplement between October and March, as sunlight exposure is insufficient to maintain adequate levels (NHS: Vitamin D). Low B12 or folate can present as fatigue, low mood or cognitive difficulty and is straightforward to correct once identified.
9. Inflammation
hs-CRP and ESR — two general markers of systemic inflammation.
Chronic low-grade inflammation is a shared feature of cardiovascular disease, metabolic dysfunction, autoimmunity and impaired recovery. It is also one of the markers that responds most visibly to sustained changes in diet, activity, sleep and stress management.
Who this test is designed for
The Health Optimisation Blood Test may be worth considering if you are:
- Experiencing persistent, unexplained symptoms — fatigue, brain fog, poor sleep or slow recovery
- Serious about training or athletic performance and want recovery, hormones and iron in one panel
- Approaching or in perimenopause or andropause and want a hormonal baseline
- Over 35 and prioritising early prevention — the age at which small drifts start to compound
- Using TRT, HRT or targeted supplementation and need periodic monitoring
- Simply someone who prefers making decisions based on data
If you have one specific question — for example, thyroid function or iron status alone — a targeted panel from our full test range is usually a more appropriate choice.
What happens after your sample is taken
- Home visit or clinic — a qualified phlebotomist collects your sample at a time convenient for you. Learn more about our home visit service.
- Laboratory analysis — samples are processed by UKAS-accredited UK laboratories
- GMC-registered doctor review — a UK-registered doctor personally interprets your results in context
- Plain-English report — each marker is explained, flagged as Optimal, Watch or Attention, with a clear summary
- Longitudinal tracking — repeat panels are compared over time so you can see what is changing and what is stable
Most results are returned within a few working days.
Frequently asked questions
How should I prepare for the test?
Fast for 10–12 hours before your blood draw for accurate glucose, HbA1c, cholesterol and liver markers. Water is fine during the fast. If you take prescribed medication, continue as normal unless a clinician advises otherwise.
Can I share my results with my GP?
Yes. Your report is a formal clinical document that can be shared with your GP or specialist and is often useful in supporting further discussion or investigation.
How often should I repeat the test?
For general health monitoring, every 6–12 months is typical. If you are actively adjusting medication, supplementation or training load, every 3–4 months allows changes to be tracked more responsively. Any retesting frequency should be discussed with your clinician.
Is this test suitable if I feel well?
Feeling well is not the same as being fully informed about your internal health. Many of the conditions this panel helps identify — such as non-diabetic hyperglycaemia, subclinical thyroid dysfunction and nutritional deficiencies — can be present for years without symptoms. A baseline gives you a reliable comparison point for the future.
Is this test suitable for children or during pregnancy?
No. This panel is designed for non-pregnant adults. Different reference ranges and testing approaches apply in paediatric and pregnancy contexts and should be arranged through your GP or a specialist.
The bottom line
You cannot optimise what you have not measured. The Health Optimisation Blood Test provides comprehensive, doctor-reviewed data — collected in your own home, analysed by UKAS-accredited laboratories and explained in language you can act on.
If you have been meaning to establish a proper health baseline, this is a considered place to start.
Book your Health Optimisation Blood Test →
About Youth Revisited
Youth Revisited is a UK-based private blood testing and preventative health service, founded in 2017. All tests are analysed by UKAS-accredited laboratories and reviewed by GMC-registered doctors. To date, more than 15,000 clients have been tested and over 850,000 biomarkers analysed across our full range of panels. Learn more about us →
References
- NICE Guideline NG28 — Type 2 diabetes in adults: management. nice.org.uk/guidance/ng28
- NICE Guideline NG203 — Chronic kidney disease: assessment and management. nice.org.uk/guidance/ng203
- NHS — Vitamin D. nhs.uk/conditions/vitamins-and-minerals/vitamin-d