Insulin-Like Growth Factor 1 (IGF-1)
A stable, all-day readout of growth hormone activity, used to flag both excess and deficiency.
Consider this test if:
- Symptoms of growth hormone excess such as enlarging hands, feet, or jaw, joint pain, or coarsening facial features
- Investigating fatigue, reduced muscle mass, or poor recovery alongside suspected pituitary dysfunction
- Monitoring growth hormone or IGF-1 replacement therapy to confirm the dose is working
- Following up on a pituitary disorder, nutritional insufficiency, or unexplained growth problem
- Setting a baseline before or during treatment for a known GH-related condition
- HSA/FSA eligible
- Typical results in 2-4 days · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
Fasting is not required, and because IGF-1 stays stable across the day, timing of the draw is not critical. Provide your age, since results are reported against age- and sex-specific ranges. Acute illness, poorly controlled diabetes, liver disease, and significant malnutrition can lower IGF-1 independent of growth hormone status.
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What this test is for
IGF-1 (insulin-like growth factor 1) is the hormone through which growth hormone does most of its work, driving tissue growth and anabolic activity throughout the body. Because growth hormone is released in short pulses while IGF-1 stays steady across the day, IGF-1 is the practical screening marker for growth hormone disorders: high levels point toward acromegaly or a growth-hormone-secreting tumor, while low levels suggest growth hormone deficiency, malnutrition, or a catabolic state. It also tracks response to growth hormone or IGF-1 replacement therapy. Results are interpreted against age and sex, since IGF-1 peaks in adolescence and declines steadily with age, which is why an age-specific Z-score accompanies the raw value.
IGF-1 measures the growth factor itself; the related IGFBP-3 test measures its main carrier protein and is often paired with it when assessing growth hormone status, while IGF-2 is reserved for specific tumor-related questions.
- Specimen
- Serum or plasma
- Measures
- Mass concentration
What you'll learn
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Insights that connect the dots. A clinician reads your whole picture, not one result in isolation, connecting family history, past results, and lifestyle into clear next steps.
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Your personalized action plan. Nutrition, supplements, and training in one clinician-reviewed protocol, updated as your results change.
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Track your trends. Upload results from any lab and see each biomarker trend over time, so you know what is working.
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Never miss a recheck. Mito tells you what is worth retesting and when, then reminds you so nothing slips.
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Typical results in 2-4 days
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
Mito Membership
$9 /mo
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Without membership
$0
pay as you go
At-cost pricing on labs, scans, and more
Priority turnaround on your results
On-demand clinician consults when you need guidance
Personalized action plans across supplements, exercise, nutrition, and sleep
AI health coaching to help you act on your results
Year-round medical support, with in-chat clinician escalation
All your health records in one personal vault, with trends and biological age tracking
Early access to new diagnostics and product releases
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost, covering the lab and what it takes to run the service. It is never a profit on the test itself. Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9 per month, and any applicable lab order or draw fee is itemized before you pay.
Where do I get tested?
Choose an available partner lab at checkout. If your cart contains multiple blood tests, Mito helps consolidate the eligible tests at one lab when possible. At-home kits and scans follow the collection or appointment process shown on their product page.
Is this eligible for HSA/FSA?
Yes. Eligible tests can be paid for with an HSA or FSA card at checkout.
When will I get my results?
Your results appear in your Mito dashboard after the laboratory completes processing. A clinician then reviews them before your analysis and personalized action plan are finalized. Timing varies by test, and specialty assays and at-home kits may take longer.
Do I need a doctor's order?
No. Mito provides the laboratory order when one is required, so you do not need to arrange a separate doctor visit before purchasing.
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