HGH Cycle: Why Prescribed Growth Hormone Is Not Cycled
Updated on October 28, 2026
Medically reviewed by Dr. Roberto Gutiérrez Meza. Last reviewed October 28, 2026.
In short: “HGH cycles” come from bodybuilding, where growth hormone is used on and off alongside steroids. Medical growth hormone therapy does not work that way: patients with a confirmed deficiency inject a steady, individually adjusted dose every day, usually for years, with IGF-1 checked at each follow-up. Cycling has no clinical rationale and no evidence behind it.
Key facts
- Deficiency does not switch off, so replacement is continuous
- Dose is adjusted by IGF-1 and symptoms, not by weeks on and weeks off
- Growth hormone works slowly: body composition changes over 3 to 6 months
- On-off use causes fluid shifts and makes side effects harder to read
- Growth hormone for performance is prohibited in sport and illegal to distribute for that purpose in the US
What do people mean by an HGH cycle?
In gym use, a cycle is a block of weeks or months of growth hormone, often stacked with anabolic steroids and insulin, followed by a break. The concept was borrowed from steroid use, where breaks were meant to let natural testosterone recover. Growth hormone replacement in a deficient patient has no equivalent recovery problem, so the concept does not transfer.
Why is prescribed growth hormone not cycled?
Because the condition it treats is permanent. Adult growth hormone deficiency, usually from pituitary disease, surgery or radiation, does not come back on its own, so the Endocrine Society guideline describes long-term, continuous replacement titrated to IGF-1. Stopping and restarting produces swings in fluid balance and blood sugar and makes it impossible to judge whether the dose is right. See growth hormone deficiency.
How long does prescribed HGH therapy last?
Usually years. Benefits build slowly: energy and sleep in the first weeks, body composition and lipids over 3 to 6 months, bone density over 1 to 2 years. The physician reviews labs every 6 to 12 months and may stop treatment if the benefit no longer justifies it. Children are treated until they reach final height, then re-tested as young adults. See what results to expect.
How long does prescribed HGH therapy last?
What are the risks of cycling growth hormone on your own?
Each restart brings fluid retention, joint pain and carpal tunnel symptoms as the body re-adapts; high doses push IGF-1 above range and raise insulin resistance; stacking with insulin adds hypoglycemia risk; and black-market product may be counterfeit or degraded. Nobody is checking IGF-1 or blood sugar between cycles. See HGH side effects.
Does an HGH cycle improve performance?
The controlled evidence says no. In fit young adults growth hormone added about 2 kg of lean mass but did not improve strength or exercise capacity and increased fatigue and swelling. It remains on the World Anti-Doping Code prohibited list, and in the United States distributing it for non-medical use is a federal offense.
What does a medically supervised plan look like instead?
A consultation with a licensed physician, an IGF-1 blood test, a low starting dose if deficiency is confirmed, a recheck after 4 to 8 weeks, then a stable maintenance dose with follow-up labs every 6 to 12 months. No weeks on and off; one dose, every day, adjusted by data. See how HGH dosage is set.
At HGH Vallarta the process is the same for every patient: a consultation with a licensed Mexican physician, an IGF-1 blood test, and a prescription only if growth hormone is indicated. See how the HGH prescription works.
Frequently asked questions
How long is a typical HGH cycle?
There is no medical HGH cycle. Prescribed growth hormone is continuous daily therapy, usually for years, with the dose adjusted from IGF-1 results rather than taken in on-off blocks.
Do you need to take breaks from HGH?
Not when it is prescribed for a confirmed deficiency. Breaks are a bodybuilding habit borrowed from steroid use and have no benefit in replacement therapy. Any pause should be a physician’s decision.
Can you cycle HGH for fat loss?
Growth hormone is not prescribed for fat loss in people without deficiency, and intermittent use causes fluid shifts rather than fat loss. The clinic does not provide it for this purpose.
What happens when you stop HGH therapy?
In a deficient adult, the benefits fade over months and symptoms of deficiency return. Stopping should be planned with the physician, who may re-test and restart.
Sources
- Molitch ME et al. Evaluation and treatment of adult growth hormone deficiency: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab 2011. https://pubmed.ncbi.nlm.nih.gov/21602453/
- Liu H et al. Systematic review: the effects of growth hormone on athletic performance. Ann Intern Med 2008. https://dash.harvard.edu/entities/publication/73120378-c10a-6bd4-e053-0100007fdf3b
- World Anti-Doping Agency. The Prohibited List, section S2.2.3 growth hormone, its analogues and fragments. https://www.wada-ama.org/en/prohibited-list
- U.S. DEA Diversion Control Division. Human Growth Hormone fact sheet. https://deadiversion.usdoj.gov/drug_chem_info/hgh.pdf
