Growth Hormone Deficiency

What is Growth Hormone Deficiency?

Growth hormone deficiency is a condition where your pituitary gland does not make enough growth hormone. The pituitary gland is a small organ at the base of your brain that controls many body functions. Growth hormone, also called GH, helps your body grow and repair tissues throughout life.

In children, not having enough growth hormone leads to slower growth than expected. Kids with this condition may be much shorter than other children their age. In adults, growth hormone deficiency can cause problems with bone strength, muscle mass, energy levels, and body composition. Adults may notice decreased muscle strength, increased body fat, and lower bone density.

This condition can be present from birth or develop later in life. Some people are born with genetic differences that affect the pituitary gland. Others develop growth hormone deficiency after injury, surgery, radiation treatment, or tumors affecting the brain. Early detection through blood testing helps doctors start treatment sooner and prevent long-term complications.

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Symptoms

Slower growth rate in children compared to peers
Shorter height or delayed puberty in adolescents
Decreased muscle mass and strength
Increased body fat, especially around the waist
Reduced bone density or brittle bones
Fatigue and low energy levels
Reduced exercise capacity and endurance
Changes in cholesterol levels
Depression or anxiety
Decreased quality of life and well-being

Many adults with mild growth hormone deficiency have no obvious symptoms at first. The condition may go unnoticed for years until bone or muscle problems develop. Children with this condition are often diagnosed earlier because parents and doctors notice slow growth patterns.

Causes and risk factors

Growth hormone deficiency can be present from birth or develop later in life. Congenital causes include genetic mutations affecting the pituitary gland, structural brain abnormalities, or problems during fetal development. Some children are born with a smaller or underdeveloped pituitary gland. In many cases, doctors cannot identify a specific cause, and the condition is labeled idiopathic.

Acquired growth hormone deficiency develops after birth due to damage to the pituitary gland. Brain tumors near the pituitary, especially craniopharyngiomas, can block hormone production. Radiation therapy to the head, traumatic brain injury, infections like meningitis, and brain surgery can all damage the pituitary. Autoimmune conditions and certain medications may also interfere with growth hormone production. Adults who had childhood growth hormone deficiency may need continued treatment throughout life.

How it's diagnosed

Doctors diagnose growth hormone deficiency using blood tests that measure hormone levels and growth factors. The two main tests are growth hormone itself and IGF-1, a protein made by the liver in response to growth hormone. IGF-1 levels stay more stable throughout the day, making them easier to measure than growth hormone, which fluctuates naturally. Lower IGF-1 levels can indicate growth hormone deficiency and help doctors track treatment response.

Rite Aid offers testing for growth hormone and IGF-1 as add-on tests to our preventive health panel. These tests help identify hormone imbalances that may affect growth, muscle strength, and bone health. Your doctor may also order stimulation tests where medications trigger growth hormone release to see how your pituitary responds. Imaging tests like MRI scans can check for tumors or structural problems in the pituitary gland.

Treatment options

Growth hormone replacement therapy with daily injections
Regular monitoring of IGF-1 and growth hormone levels
Adequate protein intake to support muscle growth and repair
Strength training exercises to maintain muscle mass
Weight-bearing exercises to support bone density
Healthy sleep habits, as growth hormone releases during deep sleep
Stress management to support overall hormone balance
Treatment of underlying causes like tumors or infections
Calcium and vitamin D supplementation for bone health
Regular follow-up with an endocrinologist specialist

Frequently asked questions

Growth hormone deficiency in adults usually results from damage to the pituitary gland. Common causes include brain tumors, radiation therapy to the head, traumatic brain injury, or pituitary surgery. Some adults had childhood growth hormone deficiency that continues into adulthood. In rare cases, autoimmune conditions or infections can damage the pituitary gland.

Doctors diagnose this condition using blood tests that measure growth hormone and IGF-1 levels. IGF-1 is more commonly tested because it stays stable throughout the day, while growth hormone fluctuates naturally. Your doctor may order stimulation tests that use medications to trigger growth hormone release. MRI scans can check for tumors or structural problems affecting the pituitary gland.

Yes, adults can develop growth hormone deficiency even if they had normal growth during childhood. This usually happens due to pituitary damage from tumors, radiation, surgery, or head injuries. Adults with this condition may experience decreased muscle mass, increased body fat, reduced bone density, and low energy. Blood testing can identify hormone imbalances and guide treatment decisions.

Children with growth hormone deficiency grow more slowly than their peers. They may be noticeably shorter than other kids their age and have a younger-looking face. Puberty may be delayed, and muscle development may be reduced. Despite being short, children with this condition usually have normal body proportions and intelligence.

Yes, growth hormone deficiency is treatable with daily growth hormone injections. This replacement therapy helps children grow at a normal rate and helps adults maintain muscle mass, bone density, and energy levels. Treatment works best when started early, especially in children. Most people need lifelong treatment, with regular blood tests to monitor hormone levels and adjust dosing.

IGF-1, or insulin-like growth factor 1, is a protein made by your liver in response to growth hormone. It carries out many of the growth effects of growth hormone in your body. Doctors test IGF-1 because its levels stay stable throughout the day, unlike growth hormone which changes hour by hour. Low IGF-1 levels suggest your body is not making enough growth hormone.

Lifestyle changes support treatment but cannot replace growth hormone therapy. Getting quality sleep is important because growth hormone releases during deep sleep. Strength training and weight-bearing exercise help maintain muscle and bone health. Eating adequate protein supports muscle growth and repair. However, people with true growth hormone deficiency need medical treatment with hormone replacement.

Testing frequency depends on whether you are starting treatment or monitoring existing therapy. Before diagnosis, your doctor may order one or more tests to confirm deficiency. Once on treatment, most people get IGF-1 tested every 3 to 6 months to ensure hormone levels are in the target range. Your endocrinologist will create a monitoring schedule based on your individual needs and treatment response.

Untreated growth hormone deficiency in children leads to significantly shorter adult height and delayed development. In adults, the condition causes progressive loss of muscle mass and bone density, increasing fracture risk. People may develop higher body fat percentages, especially around the abdomen, and experience chronic fatigue. Early diagnosis and treatment prevent these long-term complications and improve quality of life.

Growth hormone therapy is generally safe when prescribed and monitored by a doctor. Some people experience joint pain, muscle aches, or fluid retention when starting treatment. Rarely, treatment can affect blood sugar levels or increase pressure inside the skull. Regular blood tests and follow-up visits help your doctor adjust dosing and watch for side effects. The benefits of treatment usually far outweigh the risks for people with confirmed deficiency.