Overview
IGF-1 is a 70-amino acid polypeptide hormone primarily synthesized in the liver following stimulation by growth hormone. It shares a high degree of structural similarity with proinsulin and serves as a critical regulator of childhood growth and adult anabolic processes. By coordinating with growth hormone, it influences nearly every cell type in the human body, facilitating the growth of muscle tissue, bone density, and connective tissues.
Beyond its role in physical development, IGF-1 is vital for metabolic health and systemic recovery. It aids in the utilization of fat for energy and promotes cellular protein synthesis, making it a focus of research for athletic performance and anti-aging therapies. As it stimulates cell division and hyperplasia, it is particularly noted for its ability to increase the number of muscle cells and decrease recovery times following physical trauma or strenuous activity.
Mechanism of action
IGF-1 acts as a primary mediator of growth hormone (GH) effects, signaling through tyrosine kinase receptors to stimulate cellular proliferation while inhibiting programmed cell death. It activates the MAP kinase and PI3K pathways to promote systemic anabolic growth and efficient nutrient metabolism.
Reported benefits
- ▸Promotes significant muscle growth through hyperplasia.
- ▸Accelerates recovery from injuries and intense exercise.
- ▸Strengthens bones, ligaments, and cartilage.
- ▸Enhances metabolic rate and promotes fat loss.
- ▸Supports cognitive function and nervous system health.
Reported side effects
- ·Potential for acromegaly if levels are excessive
- ·Hypoglycemia due to insulin-like structure
- ·Organ enlargement
- ·Joint pain
Often stacked with
Growth Hormone (GH)GHRH analogs