--- title: "HGH (Somatropin): what sources report" url: https://humanpeptides.fyi/peptides/hgh site: humanpeptides.fyi last_reviewed: 2026-10-11 --- # HGH (Somatropin) > humanpeptides.fyi makes no claims of its own. Every statement below reports what a cited source says, with its link. Not medical advice. HGH (Somatropin): Recombinant 191-amino-acid human growth hormone (somatropin). The sources cited here most often discuss it for: Leaner body composition; Treats growth failure in children; Less visceral fat, better lipids. Evidence label: Approved (specific use). ## At a glance - **Type:** Peptide - **Family:** Growth Hormone Axis - **Evidence label:** Approved (specific use) (5 of 5) - **Regulatory status:** FDA-approved only for specific conditions such as childhood growth failure and adult GH deficiency; US federal law (21 U.S.C. 333(e)) makes it a crime to distribute HGH for unapproved uses, and FDA states no anti-aging, bodybuilding or athletic use has been authorized. - **Goals discussed:** Muscle & Tone, Fat Loss & Metabolism, Hormones & Fertility, Heart, Liver & Kidney - **Also called:** somatropin, somatotropin, rhGH, hGH, GH, Genotropin, Humatrope, Norditropin, Omnitrope, Nutropin - **Last reviewed:** 2026-10-11 ## What is HGH (Somatropin)? - Recombinant 191-amino-acid human growth hormone (somatropin); acts on GH receptors to raise IGF-1; FDA-approved (since 1987) for pediatric growth failure and adult GH deficiency, not approved (and illegal to distribute) for anti-aging. Sources: , **Regulatory status:** FDA-approved only for specific conditions such as childhood growth failure and adult GH deficiency; US federal law (21 U.S.C. 333(e)) makes it a crime to distribute HGH for unapproved uses, and FDA states no anti-aging, bodybuilding or athletic use has been authorized. Source: ## What is HGH (Somatropin) researched for? ### 1. Leaner body composition - Improves body composition: in GH-deficient adults increases lean mass (~1.4-2.6 kg) and reduces fat mass (~2.2-2.6 kg) vs placebo (meta-analyses of human RCTs) Sources: , , - Goals: [Muscle & Tone](https://humanpeptides.fyi/objectives/muscle), [Fat Loss & Metabolism](https://humanpeptides.fyi/objectives/fat-loss) ### 2. Treats growth failure in children - Treats growth failure in children (GHD, Turner, Prader-Willi, SGA, idiopathic short stature) and adult GH deficiency (FDA label) Sources: , - Goals: [Hormones & Fertility](https://humanpeptides.fyi/objectives/hormones) ### 3. Less visceral fat, better lipids - Reduces visceral fat and improves lipids (total/LDL cholesterol) in obese adults without GHD, but no net weight loss (meta-analysis of RCTs) - Long-term (5-15 yr) replacement in GHD adults linked to sustained quality-of-life gains (mostly uncontrolled studies) - Sources for this benefit: , , - Goals: [Fat Loss & Metabolism](https://humanpeptides.fyi/objectives/fat-loss), [Heart, Liver & Kidney](https://humanpeptides.fyi/objectives/organs) ## What do researchers and users say about HGH (Somatropin)? > "The Secretary of HHS has not authorized, for example, any HGH use for anti-aging, bodybuilding, or athletic enhancement." > > US Food and Drug Administration, Import Alert 66-71. Context: FDA import alert explaining the federal law that restricts HGH distribution to authorized medical uses. > "Transgenic mice that produce supraphysiological levels of GH for their age have markedly reduced life spans and experience premature onset of age-related cognitive changes." > > Perls TT, Reisman NR, Olshansky SJ, Provision or Distribution of Growth Hormone for "Antiaging" (JAMA, 2005). Context: Commentary arguing that scientific findings fail to support GH as an anti-aging therapy; the cited finding is from animal studies. > "HGH for 4 months and best sleep and recovery I have ever experienced." > > Anonymous user, r/BodyHackGuide, Hgh experience. Context: Single forum self-report; other users in the same thread reported worse sleep, feeling feverish, or no effect, and product authenticity was unverified. ## What side effects of HGH (Somatropin) are reported? - Edema (50%), arthralgia (21%), carpal tunnel (19%), gynecomastia (5%), impaired glucose/diabetes in healthy elderly Sources: - Label warnings: tumor recurrence/neoplasm risk, intracranial hypertension, pancreatitis, hypersensitivity, lipoatrophy, death in Prader-Willi children with risk factors Sources: - Counterfeit/underdosed grey-market GH common concern (anecdotal Reddit) Sources: - Higher death rates in people with acute critical illness: in two ICU trials of non-deficient adults, mortality was 42% with somatropin versus 19% with placebo. (FDA label) Sources: - In children, slipped capital femoral epiphysis (hip growth plate slipping, often showing as a limp or hip or knee pain) and worsening of existing scoliosis. (FDA label) Sources: - Contraindicated in active proliferative or severe non-proliferative diabetic retinopathy, and in children whose growth plates have closed. (FDA label) Sources: - Muscle pain and abnormal skin sensations such as numbness and tingling. (DEA drug fact sheet) Sources: - Chronically high GH levels shortened lifespan and brought on early age-related cognitive changes in transgenic mice. (animal) Sources: ## What do peptide guides say about HGH (Somatropin)? - **Dr. Axe:** Dr. Axe lists approved adult uses as deficiency from pituitary disease, short bowel syndrome and HIV-related muscle wasting, and states that using or distributing HGH without medical need and a prescription is illegal. - **Seek Peptides:** Seek Peptides notes that most doctors will not prescribe HGH without a diagnosed deficiency, and presents growth hormone releasing peptides as alternatives that prompt the body to make its own GH. - **JAMA (Perls et al.):** In adults with GH deficiency, modest body composition gains such as a 5% rise in lean mass faded for most after 24 months, and 38% dropped out citing no felt improvement. - **DEA:** The DEA reports that illicit HGH reaches users mainly through internet pharmacies, wellness and anti-aging clinics, theft, smuggling and counterfeits, and that synthetic hGH is chemically indistinguishable from natural hormone in blood and urine tests. ## What does the research say, system by system? ### Body & tissues - 14 days of rhGH increased patellar tendon collagen synthesis and muscle collagen in healthy young men without raising myofibrillar protein synthesis (human RCT crossover) Sources: - Local GH injection trended to increase tendon collagen synthesis in elderly men (human study) Sources: - Fluid retention/edema, joint stiffness and carpal tunnel common (FDA label, meta-analysis) Sources: - Users report firmer skin over 3-6 months (practitioner/blog, anecdotal) Sources: ### Hormones & physiology - Raises IGF-1 (~88% in healthy elderly RCTs) Sources: - Increases fasting glucose and insulin; risk of glucose intolerance/diabetes; can unmask hypothyroidism and hypoadrenalism (FDA label, meta-analysis) Sources: , ### Brain, mood & sleep - Meta-analysis: GH replacement in GH-deficient adults moderately improved attention and memory vs baseline (human prospective studies) Sources: - Reddit/forum users report both better deep sleep/recovery and disrupted sleep, higher resting HR and night-time numbness (anecdotal) Sources: , , ### Weight & metabolism - Reduces fat mass ~0.9 kg and visceral fat area in obese adults, without total weight loss; raises fasting glucose (meta-analysis) Sources: - Low-dose rhGH reduced visceral fat in obese non-GHD adults (2025 meta-analysis of 10 RCTs) Sources: - Lowers total and LDL cholesterol Sources: ### Muscle - Increases lean body mass ~2 kg in healthy elderly but without strength gains (systematic review) Sources: - Lean mass gain partly water; does not raise myofibrillar protein synthesis in young men Sources: - Low-dose GH increased thigh muscle area in obese adults Sources: - No significant strength/endurance effect in 12-month GHD RCT Sources: ### Also notable - Not recommended as anti-aging therapy: small body-composition changes, high side-effect rates in healthy elderly Sources: - Overall mortality not increased in long-term GHD replacement Sources: ## How strong is the evidence for HGH (Somatropin)? **Approved (specific use)** (5 of 5). FDA-approved, strong human RCT data for GH deficiency; weak/unfavorable evidence for anti-aging or performance use in healthy adults _Approved by the FDA (or a major regulator) for at least one specific use. Approval covers that use only, not the other benefits listed._ ## Questions about HGH (Somatropin) ### What is HGH (Somatropin)? Recombinant 191-amino-acid human growth hormone (somatropin). ### Is HGH (Somatropin) FDA-approved? FDA-approved only for specific conditions such as childhood growth failure and adult GH deficiency; US federal law (21 U.S.C. 333(e)) makes it a crime to distribute HGH for unapproved uses, and FDA states no anti-aging, bodybuilding or athletic use has been authorized. ### What is HGH (Somatropin) researched for? The sources cited on this page most often discuss three outcomes: Leaner body composition; Treats growth failure in children; Less visceral fat, better lipids. Each line above shows what the source reports and how strong that evidence is. ### What side effects of HGH (Somatropin) are reported? Reported in the cited sources: Edema (50%), arthralgia (21%), carpal tunnel (19%), gynecomastia (5%), impaired glucose/diabetes in healthy elderly; Label warnings: tumor recurrence/neoplasm risk, intracranial hypertension, pancreatitis, hypersensitivity, lipoatrophy, death in Prader-Willi children with risk factors; Counterfeit/underdosed grey-market GH common concern. The list is not complete, and few listed risks does not mean a compound is safe. ### How strong is the evidence for HGH (Somatropin)? Evidence label: Approved (specific use). FDA-approved, strong human RCT data for GH deficiency; weak/unfavorable evidence for anti-aging or performance use in healthy adults. ### What else is HGH (Somatropin) called? Names used for it include somatropin, somatotropin, rhGH, hGH, GH, Genotropin, Humatrope, Norditropin, Omnitrope, Nutropin. ### Does humanpeptides.fyi recommend HGH (Somatropin)? No. humanpeptides.fyi makes no claims and no recommendations of its own. It summarizes and links to what others have published and posted. Nothing here is medical advice; talk to a licensed clinician. --- Family: [Growth Hormone Axis](https://humanpeptides.fyi/peptides?cat=gh-axis). HTML version: . Disclaimer: