What are the 4 anabolic hormones?
The four major anabolic hormones are testosterone, growth hormone (GH), insulin-like growth factor 1 (IGF-1), and insulin—all essential for building muscle, bone, and tissue.
Anabolic hormones serve as your body's construction crew, orchestrating tissue repair and growth. Testosterone, produced mainly in testes and ovaries, drives muscle protein synthesis, bone density, and strength gains. It's why resistance training naturally boosts this hormone.
Growth hormone (secreted by the pituitary gland) stimulates cell reproduction and regeneration, peaking during deep sleep. It works synergistically with IGF-1, which the liver produces in response to growth hormone, amplifying muscle and bone development.
Insulin, while often discussed for blood sugar control, is powerfully anabolic it shuttles amino acids and glucose into muscle cells post-workout, supporting recovery and growth. Without adequate insulin function, your body struggles to build tissue regardless of training intensity.
Important Notes:
- Testosterone: Primary muscle-building hormone in both sexes
- Growth Hormone: Peaks during sleep, promotes tissue repair
- IGF-1: Amplifies growth hormone's anabolic effects
- Insulin: Transports nutrients into cells for recovery and growth
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