HGH (Human Growth Hormone)

HGH binds to growth hormone receptors (GHR) on target cells, primarily in the liver, triggering the JAK-STAT signaling cascade. This stimulates hepatic production of Insulin-like Growth Factor 1 (IGF-1), which mediates many of HGH's anabolic and growth-promoting effects. Direct effects of HGH include: lipolysis (mobilization of stored fat for energy), increased protein synthesis, enhanced amino acid transport, stimulation of gluconeogenesis, and anti-insulin effects on glucose metabolism. IGF-1-mediated effects include: cell proliferation and hyperplasia, cartilage and bone growth, collagen synthesis, and organ growth. HGH also stimulates immune function and thymic activity.

Subcutaneous injection produces peak plasma levels in 2-6 hours. Bioavailability is approximately 75% subcutaneously. HGH is cleared from plasma with a half-life of 3-5 hours, but its effects persist much longer because the liver continues to produce IGF-1 for 12-20 hours after each HGH pulse. IGF-1 has a longer half-life (15-20 hours) due to binding with IGF binding proteins (IGFBPs). HGH is metabolized primarily in the liver and kidneys. Endogenous HGH is released in pulsatile fashion, with the largest pulse occurring during deep sleep (stage 3-4 NREM).

• ✓Significant fat loss, particularly visceral and abdominal fat
• ✓Lean body mass preservation and modest increases
• ✓Dramatically improved skin quality, thickness, and elasticity
• ✓Enhanced wound healing and recovery from training
• ✓Improved sleep quality and depth
• ✓Increased collagen synthesis (benefits tendons, ligaments, joints, skin)
• ✓Enhanced bone mineral density
• ✓Improved immune function
• ✓Increased energy and sense of wellbeing
• ✓Improved hair and nail growth quality
• ✓Enhanced cardiovascular function
• ✓Potential cognitive benefits (emerging research)

• ⚠Water retention and bloating (dose-dependent; most common early side effect)
• ⚠Joint pain and carpal tunnel-like symptoms (from water retention in connective tissue)
• ⚠Numbness and tingling in extremities (carpal tunnel syndrome)
• ⚠Potential insulin resistance and elevated fasting glucose at higher doses
• ⚠Potential exacerbation of pre-existing diabetes
• ⚠Gynecomastia (indirect, through insulin resistance pathways, not estrogenic)
• ⚠Potential for organ growth (intestines, heart) at very high chronic doses (bodybuilding doses)
• ⚠Headaches during initial use
• ⚠Potential hypothyroidism (HGH increases T4 to T3 conversion, which may unmask subclinical hypothyroidism)
• ⚠Risk of accelerating undiagnosed cancer growth (theoretical; HGH does not cause cancer but may accelerate existing tumors via IGF-1)

Contraindications

• 🚫Active malignancy or history of cancer (IGF-1 may promote tumor growth)
• 🚫Active diabetic retinopathy
• 🚫Uncontrolled diabetes mellitus
• 🚫Active or recent intracranial lesions
• 🚫Hypersensitivity to somatotropin
• 🚫Acute critical illness (increased mortality in ICU patients given HGH)
• 🚫Pregnant or breastfeeding women
• 🚫Individuals with closed epiphyses who have acromegaly-like features

No PCT required for HGH itself. HGH does not suppress testosterone or the HPTA. However, if stacking HGH with anabolic compounds, PCT for those compounds is still necessary. After discontinuing HGH, the body's natural GH production resumes, though it may take a few weeks for pituitary function to normalize. There is no evidence of permanent pituitary suppression from exogenous HGH use.

• 1.Start low (1-2 IU) and increase by 0.5-1 IU every 2-4 weeks to minimize side effects
• 2.Fasted morning injection is ideal for fat loss; the lipolytic effect is blunted by food and insulin
• 3.If water retention is excessive, reduce dose and increase gradually
• 4.Numbness/tingling in hands usually resolves by reducing dose or typically subsides after 4-6 weeks
• 5.HGH is synergistic with testosterone for body composition; together they produce superior results to either alone
• 6.Monitor fasting glucose closely, especially at doses above 3 IU; consider berberine or metformin if glucose rises
• 7.HGH must be stored in the refrigerator; never freeze. Reconstituted vials are good for approximately 3-4 weeks refrigerated
• 8.Use bacteriostatic water for reconstitution (not sterile water, which shortens shelf life)
• 9.Generic/pharmaceutical-grade HGH (Genotropin, Humatrope, Norditropin) is preferable; Chinese generics vary in quality
• 10.HGH is a long-term commitment; meaningful results take 3-6 months minimum

1. [1]Hoffman AR, et al. (2004). Growth hormone (GH) replacement therapy in adult-onset GH deficiency. Endocr Rev.
2. [2]Liu H, et al. (2007). Systematic review: the safety and efficacy of growth hormone in the healthy elderly. Ann Intern Med.