HGH

most data

Also seen as: HGH191AA, somatropin, growth hormone, GH, Somatropin, Human Growth Hormone

The Dose Guy’s verdict

Aug 28, 2026
4 sources

Every secretagogue in this category is trying to coax your pituitary into making more of what HGH already is. If the goal is serious and the budget allows, the molecule itself is the most reliable path. It works for body composition, the data is deeper than any peptide in this category, and decades of clinical use have mapped the side profile thoroughly. The catch: it is expensive, it suppresses your own production, and the lean-mass gains are partly water. Most people should try the peptide route first, and when that is not enough, HGH is what you graduate to.

Would I take it?Yes, when you need the real thing.

What it is

Recombinant human growth hormone, the actual 191-amino-acid hormone your pituitary makes. Not a secretagogue, not an analog that nudges your axis. The molecule itself. When you inject it you are adding directly to your circulating GH, which is why it works more reliably than anything trying to coax your pituitary, and also why your pituitary dials back its own output in response. That suppression is the central tradeoff: the peptide route through CJC-1295 and ipamorelin keeps your axis in the loop, while HGH steps around it.

The clinical history runs decades, from pediatric growth deficiency to adult GH replacement to the off-label physique and anti-aging world. It is FDA-approved for real indications, none of which are the recomp or recovery most buyers want, but the mechanism does not care about the label. Elevated GH mobilizes fat and accelerates tissue turnover. The question is always whether the effect justifies the cost and the sides.

What the research shows

More randomized human data than any other compound in the GH category, and the story is nuanced: clear body-composition shifts, questionable functional gains, and a lean-mass number that is partly water:

Across randomized studies in healthy young adults, GH increased lean body mass by 2.1 kg. It did not appear to improve strength or exercise capacity.Annals 2008 · systematic review · n=303

In healthy older adults, GH cut fat mass by 2.1 kg and added 2.1 kg of lean mass, with no change in total weight. The body reshuffled without getting heavier.Annals 2007 · systematic review

One month of supraphysiological GH increased fat-free mass by 5.3% and cut body fat by 6.6%, but the fat-free gain was extracellular water, not intracellular. The scale moved, the fat-free mass number moved, and the real lean tissue did not.Clin Endocrinol 2005 · RCT · n=30

In recreational athletes, 8 weeks of GH alone increased sprint capacity by 3.9%, with the confidence interval starting at zero. Add testosterone and it jumped to 8.3%. The GH-alone sprint gain did not last 6 weeks after stopping.Annals 2010 · RCT · n=96

Realistic protocols

HGH rewards patience. The changes are slow compared to the reputation, and most of the dramatic transformations you see credit GH alongside testosterone or anabolic steroids, not alone. Solo, the fat mobilization is the most reliable output, and it takes months to see it clearly. The lean-mass story is muddied by water retention, especially early on.

Pin it subcutaneously in the morning on an empty stomach. At doses above 4 IU some people split into morning and pre-bed shots to spread the elevation and manage sides, but most do fine with one daily pin. The old 5-on-2-off schedule was meant to protect the axis, but your pituitary suppresses either way and the community has largely moved to daily dosing. Find the dose that gives you the effect without sides that bother you, and hold it there. More is not always better here, and the side profile scales faster than the benefit. If you compete in a tested sport, a passport-based detection method caught 20 of 27 recipients in a validation study, including 17 after treatment stopped. HGH is not invisible.

Wellness1–2 IU/daySub-q, AM, empty stomach. Sleep, skin, recovery. The gentle floor.

Recomp2–4 IU/dayWhere most people land for body composition. Give it months.

Performance4–8 IU/dayStronger fat loss, more sides. Diminishing returns above 6. Usually stacked, not solo.

MonitoringIGF-I, glucoseTrack both. IGF-I confirms it is working; glucose confirms the cost.

Side effects

Well-documented and dose-dependent. Most are manageable; one deserves real attention:

commonWater retention, puffy hands and face. The first thing you notice and the first to fade when you lower the dose.

commonJoint aches and carpal tunnel symptoms, tingling and numbness in the hands, especially at higher doses or early in a run.

monitorFasting glucose rises and insulin sensitivity worsens. The higher the dose and the longer the run, the more it matters. Check regularly.

monitorGynecomastia appeared in longer-term older-adult trials. Not common, but worth knowing about if you are running higher doses for months.

monitorIn a cohort of 23,984 patients, cancer elevations were largely second malignancies after prior cancer treatment. No clear overall increase in recipients whose growth failure lacked another major disease. The growth-signal question has a real answer, and it is reassuring.