Care for your schedule
Order online, test at home and get every result reviewed by a GMC-registered doctor, with no clinic visit and no waiting room.
UKAS-accredited · GMC-reviewed
Blood tests and biological age. From your home.
UKAS-accredited laboratories. Doctor-reviewed results. Up to 60 blood markers analysed, plus your biological age. Take a finger-prick at home or use our needle-free arm collector.
35markers
4 minat home
4–5 daysto results
- UKAS ISO 15189accredited laboratory
- GMC doctorsreview every result
- Free deliverytracked, both ways
- No subscriptionone-off panels never renew
Answers for your goals
Every marker explained in plain English, ranked by what matters, with the one change worth making first.
What you can track
Track the markers that actually matter
Your latest Sero Health test
29 Sept 2026
Vitamin D82 nmol/LLatest result
Health insightGreat progress. Your vitamin D has doubled across three tests, back inside the optimal range.
Every result, in plain English.
Where you sit, what it means and what to change first. No wall of numbers, just the ones that matter, explained.
See all 35 markers →Vitamin DLow
Needed for bone, mood and immunity.
41nmol/L
FerritinOptimal
How much iron you have banked.
68µg/L
TestosteroneOptimal
Drives muscle, mood, drive and recovery.
18.2nmol/L
Free T3Optimal
The active hormone your cells actually use.
5.1pmol/L
Total cholesterolOptimal
All the cholesterol carried in your blood.
4.8mmol/L
LDLOptimal
The fraction that builds up in artery walls.
2.6mmol/L
HDLOptimal
The fraction that clears cholesterol away.
1.6mmol/L
TriglyceridesHigh
Fat carried in the blood between meals.
2.4mmol/L
ALTOptimal
A liver enzyme that rises under strain.
24U/L
GGTOptimal
A liver enzyme sensitive to alcohol.
21U/L
eGFROptimal
How fast your kidneys are filtering.
96mL/min
HbA1cOptimal
Your average blood sugar over three months.
34mmol/mol
How it works
Choose your test
Pick from three panels, 25 to 60 biomarkers. A general health check, hormones and inflammation, or our most complete test. Choose the one that fits your goals.
Take your sample at home
Your kit arrives by first-class post. Use the finger-prick or the needle-free arm collector, then send it back free in the prepaid envelope.
Analysed in a UKAS lab
Samples are analysed at UKAS-accredited UK laboratories, with an accurate, detailed breakdown of every marker.
Personalised doctor review
A GMC-registered doctor reviews your results and writes a personal analysis. Read it all in your account or download it as a PDF.
See the change, not just the number.
Test, act on one clear recommendation, then retest. Your results line up so you can watch the line move.
Thirty-five numbers.
Two that need you.
Every marker measured, ranked, and written up in plain English.
Vitamin D 41 nmol/L · low
Triglycerides 2.4 mmol/L · high
Markers measured0
Flagged for you0
See what you'll get
Preview your detailed health report
Open a sample report to see exactly what you'll receive: every biomarker result, trends over time, and doctor-reviewed insights with clear recommendations.
- Clear trends over time
- Doctor-reviewed insights
- Mobile and PDF access
Included in every panel
5 years younger · 10% below your age
Your age is a number. Your blood has another.
We work out your biological age from nine markers already on your panel, using the PhenoAge model from Levine et al. (2018). Then we show you which markers are pulling it up, and what moves them.
Your birthday says49
Your blood says44
Example result. A research estimate, not a diagnosis.
Find out yoursPick your test. Everything's included.
Lab fees, doctor review, tracked postage both ways and your biological age. Nothing added at checkout.
£99one-off
The honest starting point. Everything a GP would run if you turned up tired and they had the budget.
- Full blood count, iron and ferritin
- Vitamin D, B12 and folate
- Liver, kidney and cholesterol
- HbA1c and thyroid function
- Biological age, worked out
- Finger-prick, or an arm collector
£129one-off
The one we would order for ourselves. Baseline plus the hormones and inflammation markers that explain how you actually feel.
- Everything in Baseline
- Testosterone, SHBG and cortisol
- CRP, magnesium and full thyroid
- Biological age, worked out
- Finger-prick, or an arm collector
- Priority doctor review
£199one-off
The deep end. For people training seriously, going through a change, or who simply want the whole picture on record.
- Everything in Core
- Full hormone and lipid subfractions
- Omega-3 index and homocysteine
- Biological age, worked out
- Venous draw included at no extra charge
Twice a year
Sero Twice-Yearly, £19 a month
Two Core panels a year, six months apart, with everything tracked side by side so you can see the line rather than the dot. Cancel any time; you keep every result you have already had.
Free tracked postageBoth ways, always included
A free second kitIf a sample fails at the lab
Results in 4–5 working daysFrom the lab receiving it
No subscriptionOne-off panels never auto-renew
Questions, answered.
Yes, for the markers on these panels. Capillary blood is validated for everything we test and it goes to the same accredited laboratory as a venous sample. There are markers that genuinely need the larger volume of a venous draw, and those are the ones on Complete, where a venous draw is included as standard.
There is, and it is the option most people who ask this end up taking. The arm collector is a small device that sticks to your upper arm; you press it once and it draws the sample itself over about five minutes. No lancet, nothing sharp to look at, and it collects more blood than a finger will give, so fewer samples fail at the lab. It is £25 on top of any panel, chosen at checkout.
From nine markers that are already on the panel: CRP, glucose, creatinine, albumin, ALP, white cells, lymphocytes, MCV and RDW, all run through PhenoAge, a model published by Levine and colleagues in 2018 and validated against large population studies. It is an estimate, not a diagnosis, and the useful part is not the number itself but which markers are pulling it, and whether it has moved by the time you retest.
Every panel is reviewed by a GMC-registered doctor before you see it. If a result needs acting on quickly, you get a phone call rather than an email, along with a letter you can hand straight to your GP. We do not diagnose and we do not prescribe. The point of that letter is to get you seen faster with the evidence already in hand.
For Baseline and Core, no. For Complete’s lipid subfractions we ask for a twelve-hour fast, which in practice means taking the sample before breakfast. Whichever you choose, take it at a similar time of day each time, because several of these markers move considerably between morning and evening, and consistency is what makes a retest meaningful.
You, the reviewing doctor and the laboratory. Nobody else, ever. Blood results are special category data under UK GDPR and we treat them that way: encrypted at rest, never sold, never used for advertising, and deletable on request in full. We are registered with the ICO as a data controller.
Four to five working days from the lab receiving your sample. You will get an email when the sample arrives and another when the doctor has signed it off.
Any time, from your account, in two clicks and with no phone call. You keep every result you have already had. They are yours, not ours. One-off panels never auto-renew; there is nothing to cancel.
Not yet. Kits ship to UK mainland addresses only, because the return leg has to reach the lab within a fixed window for the sample to stay viable. Northern Ireland, the Highlands and the islands are supported but add a day.
Order a blood test
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