IGF-1: Research, Dosing, and Where to Buy in 2026
A research-first profile for IGF-1, aggregating mechanism notes, transcript dosing mentions, vendor recommendations, and PubMed-indexed literature without presenting medical guidance.
IGF-1 is a research compound profiled here from named-expert transcripts and peer-reviewed literature, without medical guidance. As of July 2026, The Peptide Wiki aggregates 15 PubMed-cited papers, 33 attributed expert mentions, 10 transcript dosing protocols, and 1 referenced vendor for IGF-1, each linked to its source.
- 10 aggregated dosing-protocol mentions from source transcripts.
- 15 PubMed-indexed citations listed in the research table below.
- 1 vendor recommendation captured from named experts.
- Evidence level in this entry is marked as research.
What is IGF-1?
Research compound aggregated from creator and literature mentions. No direct disease-treatment claims are made on this page.
Experts on background and overview · 13 cited mentions
"I did some research. IGF-1 shouldn't be too high. Actually, it has no benefit for wound healing. So I'm just using growth hormone - 2.5 in the morning, 2.5 in the evening. That should bring my IGF-1 up high enough."
"you train chest twice per week with high intensity with low volume and a good rep range that works for you with some localized IGF-1 injections."
"what I lowered was my IGF-1. And I've seen it on several other people's blood work that high dose S-4 BP332 lowers IGF-1 levels."
Show 10 more cited mentions on background and overview →
"And IGF-1 obviously but you get that for free from the growth hormone up to a certain dose and then you get diminishing return."
"You would need like 12 mg of in collect to see a dramatic change in your blood work levels if you're a 100 kg bodybuilder."
"Mhm. I have my guys maybe twice or three times uh during a year maximally on shorts. Okay. Sure. Four weeks spans."
"IGF-1 level, it highly depends, man. Some people have 600, some people have 200 depends on how healthy your liver is and how cooperative it is in IGF-1 production. So, if you do your blood work and your IGF-1 levels are low, doesn't mean that your GH is bad. Just means that your liver is lazy."
"SLU-PP-332 has been shown to lower IGF-1 quite dramatically if you make a dose of it."
"the only two variables that I changed were my training... And then the second variable was IGF-1 was me utilizing IGF-1 on those days that my heart lateral portion in the quads right wherever I just injected it."
"See how you respond to those compounds first before you add in a growth hormone or a growth hormone secretagogue or an IGF-1 LR3 or DES or Inclecs. Because those can exacerbate the formation [of gyno]."
"Will your IGF-1 still be elevated which is a halfife of 32 to 36 hours? Of course. Did you check your IGF-1? Probably not."
"I have very much positive with IGF IGF-1 or LR3DES or any of the variants with almost anyone."
"So, I have very much positive with IGF IGF-1 or LR3DES or any of the variants with almost anyone. A lot of people like to swear by incocts and things like that, but I've seen people who have used it who are not genetic monsters, who are not on high doses of form of GH, and it didn't have the same effect that people claim."
What is IGF-1 researched for?
Insulin-like Growth Factor 1, anabolic peptide stacked into TRT protocols.
IGF-1 Dosing Protocols
The entries below are transcript-derived dosing mentions. They are preserved for research context and are not medical advice.
| Speaker | Source | Timestamp | Protocol | Evidence |
|---|---|---|---|---|
| Vigorous Steve | Staying Dry On A Cut, Injectable Oral AAS, Sleep: GH Secretagogues... | 01:15:37 | Steve reported (anecdotal) using localized injection into the target muscle on high-intensity training days, pairing it with a caloric surplus that day and training lagging body parts 2-3x/week. | anecdotal |
| Vigorous Steve | (Not Really) Enhanced Games REVIEW! Point Proven, Or Major Flop?... | 01:08:05 | During quad tendon recovery: avoid high IGF-1; use growth hormone 2.5 IU AM + 2.5 IU PM to raise IGF-1 appropriately; removed berberine to avoid IGF-1 suppression | anecdotal |
| Nyle Nayga | Milos Debates PED's, IGF-1, Insulin, Training, & GH | 00:47:04 | 40 micrograms total per session (~20-25 mcg per quad), injected site-specific into lateral quad for sweep; used 1-2x/week during off-season for weak body parts | anecdotal |
| Vigorous Steve | Pool Party Protocols, 16-Week Tren Cycle, No GH Bloat, EQ Safety,... | 01:19:44 | Steve's anecdotal report indicated that approximately 12 mg of Increlex produced a dramatic blood IGF-1 change for a 100kg bodybuilder. | anecdotal |
| Milos | Milos Debates PED's, IGF-1, Insulin, Training, & GH | 00:38:54 | Site-injection split: 10 mcg long head + 10 mcg short head + 10 mcg outer triceps + 10 mcg long triceps = ~40 mcg total per arm-day | anecdotal |
| Vigorous Steve | You've Been Bulking Wrong! Stop Now And Do It This Way Instead...... | 00:03:19 | Slowly build up IGF-1 dosage over time during off-season cycle to allow adaptation and manage water retention. | anecdotal |
| Vigorous Steve | BAM15 Vs. ATX-304, Cagrilintide Vs. Eloralintide, SLU-PP-915,... | 01:37:42 | Host's preferred IGF-1 dose: 1 mg/day. | anecdotal |
| Vigorous Steve | Debunking Growth Hormone Myths, Insulin Resistance, Fat Loss,... | 00:09:20 | Steve reported using localized spot injections (chest/lat/delta) targeting muscle hyperplasia; observed minimal serum changes due to binding proteins. | anecdotal |
| Vigorous Steve | FULL Quad Tear Recovery Protocol, HGH Serum Tests, Maximize Cardio... | 00:41:15 | Halflife 32-36 hours - bloodwork after GH injection should check IGF-1 not GH directly | anecdotal |
| Trensparent with Nyle Nayga | Broderick Chavez: The Best Way To Grow Fast (PED’s, GH, Insulin, IGF-1, etc) | 01:22:44 | Host reported tailoring IGF-1 to specific muscle groups, using it once or twice per week rather than cycling it broadly for four weeks. | anecdotal |
Where to Buy IGF-1 in 2026
Optimize HRT
Code: NYLEVisit vendor → View profile →Recommended by Niles at 00:55:27.
Side Effects and Safety
Anecdotal reports and study-level observations vary by route, dose, and individual. This page does not provide medical advice. Consult a qualified clinician before any research use.
What Experts Say
3 experts across our source library discuss IGF-1. Each entry is that expert’s most context-rich mention: click to watch it at the exact timestamp in the original video. Quotes are also emitted as Schema.org Quotation JSON-LD for AI assistants.
-
“I did some research. IGF-1 shouldn't be too high. Actually, it has no benefit for wound healing. So I'm just using growth hormone - 2.5 in the morning, 2.5 in the evening. That should bring my...”
-
“Mhm. I have my guys maybe twice or three times uh during a year maximally on shorts. Okay. Sure. Four weeks spans.”
-
“the only two variables that I changed were my training... And then the second variable was IGF-1 was me utilizing IGF-1 on those days that my heart lateral portion in the quads right wherever I...”
See 9 more expert mentions →
-
“you train chest twice per week with high intensity with low volume and a good rep range that works for you with some localized IGF-1 injections.”
-
“what I lowered was my IGF-1. And I've seen it on several other people's blood work that high dose S-4 BP332 lowers IGF-1 levels.”
-
“And IGF-1 obviously but you get that for free from the growth hormone up to a certain dose and then you get diminishing return.”
-
“You would need like 12 mg of in collect to see a dramatic change in your blood work levels if you're a 100 kg bodybuilder.”
-
“IGF-1 level, it highly depends, man. Some people have 600, some people have 200 depends on how healthy your liver is and how cooperative it is in IGF-1 production. So, if you do your blood work...”
-
“SLU-PP-332 has been shown to lower IGF-1 quite dramatically if you make a dose of it.”
-
“See how you respond to those compounds first before you add in a growth hormone or a growth hormone secretagogue or an IGF-1 LR3 or DES or Inclecs. Because those can exacerbate the formation [of gyno].”
-
“Will your IGF-1 still be elevated which is a halfife of 32 to 36 hours? Of course. Did you check your IGF-1? Probably not.”
-
“I have very much positive with IGF IGF-1 or LR3DES or any of the variants with almost anyone.”
User Reviews
User reviews aggregator coming Q3 2026 (Reddit + YouTube comments + Discord research notes). Until then, see the expert quote section above and PubMed citations below.
Research Efficacy Snapshot
Published efficacy percentages cited in PubMed trials and named-expert reports about IGF-1. Each line links to the original source.
- "**RESULTS**: In a cohort of 82 patients surgically treated for acromegaly and thereafter examined with an oral glucose tolerance test (OGTT), 16 (19.5%) exhibited biochemical discordance." · Pennlund A et al, 2026 PubMed
- "**CONCLUSION**: The prevalence of biochemical discordance in our cohort was 19.5%." · Pennlund A et al, 2026 PubMed
- "A total of 2396 children were included, with 61.4% being boys, who exhibited a higher prevalence across most age groups." · Ban C et al, 2026 PubMed
- "The one-time preventive application of FGF-10, HGF, IGF-1 or PDGF-AA in therapeutic dosage or the repetitive application during HOX (40% or 80%) did not attenuate the growth inhibition and cell death induction by HOX even during the milder HOX40% exposure." · Holzfurtner L et al, 2026 PubMed
- "In 5 of 39 patients (12.8%), IGF-1 SDS exceeded + 2 SDS, requiring dose reduction." · Gider T et al, 2026 PubMed
- "zinc supplementation can lead to a significant increase of of igf1 level in children to about 10%" · Lucy on "How to Make Your Child Taller & Smarter" @ 2:17
- "Tesmelon is typically going to raise IGF-1 by 80 to 110% in a lot of cases." · Speaker 1 on "The Tesamorelin Masterclass | Complete User's Guide (2026)" @ 8:22
- "That should rise around 50 to 110% depending on the dose." · speaker_1 on "The Tesamorelin Masterclass | Complete User's Guide (2026)" @ 23:37
Research and Studies
15 PubMed-indexed papers reference IGF-1. Top 15 shown.
Legal Status
IGF-1 is presented here as a research compound. FDA approval status, scheduling, WADA status, and state-specific telehealth rules may apply. Always verify current regulatory status. Last verified: 2026-07-09.
Frequently Asked Questions
Is IGF-1 FDA-approved?
IGF-1 is presented on this page as a research compound. FDA approval status, scheduling, and state-specific rules may apply and change. Verify current regulatory status before any decision.
What dosing is reported for IGF-1?
This page aggregates 10 dosing-protocol mention(s) from named-expert transcripts, each linked to a verbatim source timestamp. See the Dosing Protocols table above. Mentions are anecdotal, not medical advice.
Where can I buy IGF-1?
1 vendor recommendation(s) are tracked in our directory, sourced from named-expert mentions. See the Where to Buy section above. Always verify COA and current regulatory status.
How much research has been published on IGF-1?
15 PubMed-indexed paper(s) reference IGF-1 in our current research feed. See the Research and Studies section above for citations.