Nov 6 • General discussion
Lesson 12: GH → IGF-1: The Growth, Recovery & Repair Axis
Today I introduced the GH → IGF-1 pathway.
Here’s what GH and IGF-1 actually do in your body:
Growth Hormone (GH):
- Released in pulses (mostly during deep sleep)
- Mobilizes stored fat for fuel
- Signals the liver to release IGF-1
IGF-1 (Insulin-Like Growth Factor-1):
- Increases protein synthesis (muscle growth)
- Improves recovery and tissue repair
- Supports cognitive function and drive
Simple takeaway:
GH sends the signal.
IGF-1 does the work.
And to keep you from overproducing GH, IGF-1 sends a negative feedback message back to the brain to temporarily stop production.
If you’re not building muscle, not recovering, and your sleep sucks: it’s not just testosterone.
GH/IGF-1 might be the missing link.
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Lesson 12: GH → IGF-1: The Growth, Recovery & Repair Axis
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