Specialist marker · Hormones
An IGF-1 blood test measures insulin-like growth factor 1, made by the liver in response to growth hormone, so it reflects your average growth hormone activity. It is useful for ageing and recovery questions and for anyone using peptides or growth hormone. You can add it to TrueVitals Ultimate for £119, or get it included in Signature (£799).
Add-ons are tested on the same blood draw as your panel and reported inside your clinician-reviewed report, read alongside your other 140 results. They are not sold on their own.
Pay in instalments with Klarna or Clearpay at checkout. Want it with Advanced instead? Email support@truevitals.co.uk and we will set it up.
Growth hormone is released in pulses, mostly during sleep, so a single growth hormone test is almost meaningless. Growth hormone tells the liver to make IGF-1, which stays steady in the blood through the day. That makes IGF-1 the practical way to see how much growth hormone activity you have.
IGF-1 drives tissue growth and repair, muscle and bone maintenance, and it naturally falls with age.
IGF-1 ranges depend heavily on age and sex. A healthy 25-year-old typically runs far higher than a healthy 65-year-old. Your report uses the lab's age-matched range and shows where you sit within it.
| Option | Includes it | Price | What else you get |
|---|---|---|---|
| Ultimate + IGF-1 add-on | Yes | £518 incl. clinic draw (home visit £547) | Read alongside testosterone, thyroid, cortisol, insulin and liver markers. Clinician-reviewed report in 4 working days. |
| TrueVitals Signature | Yes | £799 incl. draw | Included as standard, with 44 other specialist markers. Up to 12 working days. |
| TrueVitals Advanced | On request | £319 + £119 | Can be added on request by email. |
| NHS GP | On request | Free if clinically indicated | Usually only when a pituitary problem is suspected. |
TrueVitals prices checked 5 November 2026. Every TrueVitals report is clinician-reviewed. Pay in instalments with Klarna or Clearpay. Book a draw at one of 103 partner clinics, or add a home visit.
Where a private test isn't enough: if you have signs of a pituitary problem (changes in hand or shoe size, coarsening facial features, persistent headaches with vision changes), see your GP. IGF-1 helps screen, but diagnosis needs specialist testing.
A private panel is a good way to get a baseline, understand a result in context and track it over time. It does not replace your GP for symptoms, and anything that needs follow-up is flagged in plain words in your report.
IGF-1 on its own rarely tells the whole story. In TrueVitals panels it is reported with these related markers:
Not as standard. Add it to Ultimate for £119, or choose Signature, which includes it.
A single growth hormone test is not useful because levels swing up and down through the day. IGF-1 is the standard way to assess growth hormone activity.
It is not essential for IGF-1, but Ultimate includes fasting insulin and glucose, so an overnight fast gives the best overall result.
Your report shows where you sit against the age-matched range. Persistently running above range carries risks, so it is worth discussing with the clinician supervising your treatment.
Yes, steadily from early adulthood. That is why results are always compared with an age-matched range.
Yes. IGF-1 can be taken by a nurse at home: Ultimate + IGF-1 with a home visit is £547.
How this page was written: by James Smillie, founder of TrueVitals, reviewed by the TrueVitals clinical review team, using NHS and laboratory reference sources. Ranges are typical values; your report uses your lab's own ranges. TrueVitals sells the panels named on this page, so we have stated plainly what this test cannot do. Last updated 5 November 2026.
Ultimate + IGF-1: £518 including the clinic draw, or Signature with IGF-1 included: £799.
Clinical trust, built in
Included in the price, never an add-on. We consider it essential.
We've had GPs, surgeons and specialist doctors trust us for their own bloods.
Metabolic health, menopause specialists and more, ready if your results need a closer look.
Meet our specialists →We use cookies to help improve your experience. Learn more
Keep you signed in and let checkout work. The site needs these.
Help us see which pages are useful and where people come from. No advertising, nothing sold.
.png)