Growth Hormone Therapy Overview

Growth hormone therapy is a treatment used in certain people with a diagnosed growth hormone deficiency or specific medical conditions. This page explains, in neutral terms, what it is, how it generally works, the common forms, how it is monitored, and the considerations to discuss with a clinician.

What growth hormone therapy is

Growth hormone is produced by the pituitary gland, a small gland at the base of the brain, and is released in bursts, mostly during sleep. In childhood it is a major driver of linear growth, helping bones lengthen and tissues develop. In adulthood it continues to play a role in maintaining body composition, bone strength, muscle, and aspects of metabolism. Its release is governed by signals from the hypothalamus, and many of its effects are carried out indirectly through another hormone, insulin-like growth factor 1 (IGF-1), which the liver and other tissues make in response.

Therapy uses a manufactured (recombinant) form of the hormone to replace what the body is not making in sufficient amounts, or to support growth in particular medical conditions. It is a specialist treatment that aims to restore a more typical hormonal state, not a general tonic. It is not appropriate for healthy people seeking anti-ageing, body-building, or performance effects, and using it that way is not supported and can be harmful.

Who it may be considered for

Diagnosis comes first. Therapy is generally considered only after a specialist confirms a diagnosis through clinical assessment and tests, because a true deficiency must be distinguished from other causes of similar symptoms. Recognized situations include:

• Children with a confirmed growth hormone deficiency, or certain genetic and medical conditions that affect growth, where careful evaluation supports treatment.
• Adults with a confirmed growth hormone deficiency, often resulting from pituitary disease, a pituitary tumour or its treatment, surgery, or radiation, and sometimes carried over from childhood-onset deficiency.

Diagnosis usually involves more than a single blood test, because growth hormone is released in pulses and a one-off level is hard to interpret on its own. Specialists often use stimulation tests, which assess how the pituitary responds to a provoking agent, along with related markers such as IGF-1 and imaging of the pituitary where relevant, interpreted alongside the clinical picture, before considering therapy.

How it generally works

The manufactured hormone acts like the body's own. In children it supports growth at the growth plates of the long bones; in adults it helps maintain lean tissue, bone, and metabolic balance. Because many of its actions are mediated by IGF-1, clinicians often use IGF-1 as one helpful marker when judging whether the amount of therapy sits in a sensible range — too low may mean under-treatment, while a level above the typical range may prompt a reduction. The goal is to bring the hormonal state toward what the body would normally maintain, rather than to push levels higher than typical.

The expected effect differs by setting. For children treated for a deficiency, the aim is to support growth toward a height that fits their background and potential, judged over time rather than week to week. For adults, the aims are more about body composition, bone, energy, and metabolic wellbeing, since growth in height is no longer possible once the growth plates have closed. In both cases, therapy is introduced gradually and the amount is adjusted in response to how the person responds and what monitoring shows.

Common forms and routes

Growth hormone is a protein, so it would be broken down in the digestive tract and cannot be taken as an ordinary tablet. It is given by injection into the fatty tissue just under the skin. Described generally, options include:

• Daily injections given with a pen-style device, which has been the long-standing approach.
• Longer-acting preparations given less frequently, available in some regions, which may reduce how often an injection is needed.

This comparison is illustrative; the choice depends on the diagnosis, the person's circumstances, and what is available. Devices are designed to make self-administration manageable, and a clinical team typically provides training. This page does not give doses, which are individualized and adjusted by a specialist.

How clinicians typically monitor it

Monitoring is an important part of therapy and is overseen by specialists. It commonly includes:

• Measuring IGF-1 to help judge whether the level sits in a sensible range, guiding gradual adjustment.
• In children, careful tracking of height, growth velocity, and progress against expected patterns over time.
• In adults, review of body composition, wellbeing, and relevant metabolic markers such as those related to blood sugar and lipids.
• Watching for side effects and reassessing whether therapy is still providing benefit.

Monitoring is usually more frequent early on, while the appropriate amount is being found, and then spaced out as therapy stabilizes.

Known considerations and risks

Used for a confirmed indication and supervised appropriately, growth hormone therapy aims to restore a more typical hormonal state. Considerations that are weighed individually can include fluid retention and swelling, joint or muscle aches, carpal-tunnel-type symptoms, effects on blood sugar handling, and headaches; some of these may ease with adjustment of the amount used. Certain conditions call for extra caution, and therapy is generally avoided in some situations, such as active cancer or critical illness, which is part of the specialist assessment.

Because growth hormone influences many tissues, ongoing supervision and monitoring help keep therapy within a sensible range and allow problems to be caught early. Some long-term questions continue to be studied, so specialists generally take a conservative, individualized approach and reassess whether therapy is providing benefit over time. Using growth hormone outside of a recognized medical indication — for instance for anti-ageing or athletic performance — is not supported and can be harmful.

Shared decision-making

Growth hormone therapy is a specialist decision made together with clinicians who interpret your tests, weigh the trade-offs, and explain what the treatment and its monitoring involve. Because therapy is often long-term, an understanding of the goals and the review schedule helps. Explore related material in our hormones and conditions sections, learn about testing under blood tests, and see other options in the treatments overview.