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IGF-1 LR3

Also known as: Long R3 IGF-1

GH/GHRH Research Compound

Long-acting IGF-1 analog

Mechanism of Action

Modified IGF-1 with reduced binding-protein affinity and a longer half-life, driving anabolic/hypertrophic signaling. Used in bodybuilding contexts.

119
Community Posts
46
Users Discussing
0
Research Articles
0

Reported Outcomes

Clinical grade reflects published research; Community grade reflects user reports (n=119).

Growth Hormone

Effects on growth hormone levels

Clinical: D
Community: B
100% (119)
Body Composition

Changes in muscle vs fat ratio

Clinical: D
Community: A
33% (26)
Sleep Quality

Effects on sleep quality

Clinical: D
Community: C
22% (24)

Side Effects

Limited data

Based on 1 user reports (n=1). Frequency indicates how often each was mentioned.

Uncommon (1-5%)

Allergic Reactions (Major Itchy Skin
Mild 1 reports 100.0%
Flushing
Mild 1 reports 100.0%
Hives)
Mild 1 reports 100.0%

Risks & Warnings

Important safety considerations based on clinical data and community reports.

i

Injection Site Reactions

3 mentions

Local reactions are common and usually mild. Rotate injection sites.

Dosing

Standard Protocol

Starting Dose
20-50mcg daily (community protocols)
Titration
No established protocol
Half-life
~20-30 hours
Administration
Subcutaneous injection

Community Dosing Patterns

Based on 4 mentions

Community-reported patterns, not medical advice.

15mcg
1
40mcg daily
1

Commonly Stacked With

From community members' documented stacks involving IGF-1 LR3.

HGH (Somatropin) 5 stacks (50%)
Retatrutide 4 stacks (40%)

Switching Patterns

Based on 11 discussions about switching to or from IGF-1 LR3.

← Switching TO

HGH (Somatropin) 4 mentions
Retatrutide 3 mentions

Users who switched from IGF-1 LR3