IGF-1 DES vs IGF-1 LR3: which is better?

They serve different purposes. IGF-1 LR3 has a long half-life (20-30 hours) and works systemically. IGF-1 DES has a short half-life (20-30 minutes) and is used for localised, site-specific effects. For targeted muscle growth, DES is preferred. For overall systemic IGF-1 elevation, LR3 is more practical.

Growth Hormone

IGF-1 DES

Des(1-3) IGF-1 (Truncated Insulin-like Growth Factor 1)

10x more potent than IGF-1 with no binding protein interference

IGF-1 DES is a truncated version of IGF-1 missing the first three amino acids. This modification makes it approximately 10 times more potent because it cannot be sequestered by IGF binding proteins.

IGF

💉

Admin routes

Subcutaneous, Intramuscular

🔬

Popularity

Niche

⚠️

Side effects

Monitor closely

🏪

AU vendors

0 rated

✓Key benefits

1Approximately 10x more potent than standard IGF-1

2Not sequestered by IGF binding proteins

3Short half-life allows targeted, localised application

4Promotes muscle cell hyperplasia (new cell creation) in vitro

📈What to expect

Immediate

Blood sugar drop possible within 30 minutes, have carbs available

Week 2-4

Localised muscle fullness and pump in injected areas

Week 4-6

Measurable size increases in targeted muscles reported by users

Based on community reports and published research. Individual results vary significantly.

💊Dosing protocols

Localised muscle growth (community protocol)

Dose

20-50 mcg

Frequency

Injected bilaterally into target muscle, pre or post workout

Duration

4-6 week cycles

Dosing information is sourced from published research and community protocols. This is not a recommendation. Consult a healthcare professional.

Research status|Research compound - used in in vitro and animal studies

Overview

IGF-1 DES (des(1-3) IGF-1) is a naturally occurring variant of IGF-1 found in the human brain during fetal development. The removal of the N-terminal tripeptide (Gly-Pro-Glu) eliminates its ability to bind to IGF binding proteins (IGFBPs), which normally sequester and inactivate circulating IGF-1. Because IGFBPs cannot neutralise it, IGF-1 DES has roughly 10-fold greater biological potency than full-length IGF-1 LR3. It has a very short half-life (20-30 minutes) compared to IGF-1 LR3 (20-30 hours), making it suitable for localised, site-specific use.

⚙️How it works

IGF-1 DES binds to and activates the IGF-1 receptor (IGF-1R) with similar affinity to full-length IGF-1. Once IGF-1R is activated, it triggers the PI3K/AKT pathway (promoting cell survival and protein synthesis) and the RAS/MAPK pathway (promoting cell proliferation and differentiation). Because it is not bound by IGFBPs, all administered IGF-1 DES is bioavailable and active, resulting in much higher effective potency per microgram.

⚡Side effects

Hypoglycaemia (potent insulin-like activity)

seriousCommon

Localised pain and swelling at injection site

mildCommon

Potential for accelerated growth of existing tumours (IGF pathway)

seriousRare

📅Research history

1988

Francis et al. characterise des(1-3) IGF-1 from bovine colostrum

References

[1]Francis GL, et al. 'Insulin-like growth factors 1 and 2 in bovine colostrum. Sequences and biological activities compared with those of a potent truncated form.' Biochemical Journal, 1988.

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Community experiences

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Disclaimer: This guide is for educational and informational purposes only. It is not medical advice. The dosing protocols listed are sourced from published research and community reports and do not constitute a recommendation. Always consult a qualified healthcare professional before using any peptide. Australian regulations classify many peptides as Schedule 4 (prescription-only) substances. Check current TGA guidelines before purchasing.