Insulin-Like Growth Factor 1 (IGF-1)
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A stable, all-day readout of growth hormone activity, used to flag both excess and deficiency.
- Member pricing close to cost, no upsells
- Schedule online, typical results in 2-4 days
- Clear guidance, results reviewed by a real clinician
- Follow-up care available
HSA/FSA eligible
About this test
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.
Consider it 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
Why are there member and non-member prices?
Members get Mito's no-markup price on tests. The non-member price is the standard price.
Mito membership is $9/month and unlocks member pricing across the catalog. It's how Mito is supported, so we don't have to mark up your tests or earn more when you buy more. Your member savings are applied at checkout.
Video call with clinician
Speak with a real clinician to discuss your labs.
What's included
What's tested
This test measures a single biomarker: Insulin-like growth factor-I.
Test details
- Sample type
- Blood sample (serum)
- Collection
- Partner lab visit
- Preparation
- No fasting required
- Results in
- Typical results in 2-4 days
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.
Results in as little as 1-2 business days
- 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 Results in 1-2 business days
Your results post to your dashboard fast — then a clinician reviews them and your personalized action plan follows.
- 4 Expert guidance
Our clinicians will recommend next steps. Or book a same-day visit for comprehensive care.
Everything your health needs,
in one membership
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Cost-plus on every test you order
Members pay close to 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
cancel anytime
Without membership
$0
pay as you go
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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. Your price is our cost plus a small amount to run the service, never a profit on the test itself; Mito makes its money on the $9 membership, not on marking up your tests. Members pay even less, applied at checkout (membership is $9/mo, and you still pay the lab’s order fee). Prices are itemized before you pay, with no hidden fees.
Where do I get tested?
Choose a partner lab (Quest, Labcorp, or BioReference) at checkout. If your cart spans multiple tests, we consolidate the whole order onto a single lab so you only make one visit.
Is this eligible for HSA/FSA?
Yes. This test is HSA/FSA eligible, and you can pay with your HSA/FSA card at checkout.
When will I get my results?
Your results are typically visible within 1-2 business days of your lab visit. A clinician then reviews them, and your full analysis and personalized action plan — with clear next steps — follow once that review is complete. Specialty assays and at-home kits take longer; each test shows its turnaround before you buy.
Do I need a doctor’s order?
No. Mito provides the lab order for you, so you can book and get tested without a separate doctor visit.