Do you feel like your child is not growing as tall as they should? Or do you always feel tired and lethargic? Maybe the reason for this is a small chemical messenger in your body. One such hormone that is important for our body's growth and many other things is called human growth hormone . We call it HGH (Human Growth Hormone) for short. Some also call it somatotropin . So today, let's talk about this HGH in detail, very simply.
What is HGH? How is it produced in our body?
Simply put, HGH is a natural hormone that our bodies produce. It is produced by a small gland located just below our brain, about the size of a small bone. We call it the pituitary gland . This HGH hormone affects many parts of our body. It is especially essential for the growth of children . HGH helps a lot in things like making your child taller and making their bones stronger.
However, once we grow up, that is, after the growth plates in our bones (epiphyses) have closed, HGH no longer makes us taller. But that's not all that HGH does. Even after we grow up, HGH helps maintain the normal structure of our body and keep our metabolism running properly. This metabolism is what turns the food we eat into energy. HGH also helps keep our blood sugar (glucose) levels at a certain level.
Hormones are chemicals in our bodies. They act like messengers. They travel through the blood and tell our organs, muscles, and other tissues what to do and when to do it. There are over 50 of these hormones in our bodies!
The pituitary gland that I mentioned earlier is located at the base of the brain, below the hypothalamus . This hypothalamus controls many things like our blood pressure, heart rate, body temperature, and digestion. So, this hypothalamus is what tells the pituitary gland to release HGH. A hormone that helps with that is called GHRH (growth hormone-releasing hormone) . Also, another hormone (somatostatin) comes from the hypothalamus to stop the release of HGH. This is how HGH is controlled.
Sometimes doctors use synthetic HGH to treat certain diseases. But remember, never use synthetic HGH without a doctor's prescription.
What factors affect HGH secretion?
Our pituitary gland normally releases HGH in small amounts throughout the day, called pulses . This is controlled mainly by two hormones from the hypothalamus called GHRH and somatostatin.
Not only that, but other hormones are involved. For example , insulin-like growth factor 1 (IGF-1) reduces HGH production. However, hormones such as thyroxine , glucocorticoids , and ghrelin increase HGH release.
IGF-1, which is released by our liver, is a major byproduct of HGH activity. This IGF-1 is what controls the overproduction of HGH. That is, HGH causes IGF-1 to be produced, and the produced IGF-1 again reduces the production of HGH. It's like a cycle.
In a healthy person, HGH release is inhibited by high blood sugar levels (hyperglycemia) . In addition, HGH release is stimulated by things like sleep, stress, exercise, low blood sugar levels (hypoglycemia) , and amino acids .
What are the main functions of the HGH hormone?
HGH has two main functions:
1. Stimulating growth (especially in children)
2. Affecting metabolism (the way we convert the food we eat into energy)
HGH and growth
HGH helps every tissue and organ in our body grow. But it is most famous for helping cartilage and bone grow. This is especially important during adolescence. Cells called chondrocytes in cartilage and osteoblasts in bones receive signals from HGH to divide and grow larger.
However, as I mentioned earlier, HGH does not increase height after the growth plates (epiphyses) in a child's bones have closed. Instead, HGH helps maintain normal body structure throughout life.
HGH and metabolism
Metabolism is the chemical process that turns the food we eat into energy. Every cell in our body needs energy to function properly.
HGH affects metabolism primarily by increasing the production of IGF-1, which changes the way it affects our body's cells. IGF-1 is a hormone that has a similar structure to insulin . Insulin is an essential hormone produced by our pancreas that lowers blood sugar (glucose) levels. IGF-1 also has the ability to lower blood sugar.
Normally, our bodies carefully control the level of glucose in our blood. Blood glucose, or sugar, is the main type of sugar in our blood. We get it from the carbohydrate foods we eat. This sugar is what provides energy for our organs, muscles, and nervous system.
Insulin is the main hormone that lowers blood sugar when it is high. Glucagon is the hormone that raises blood sugar when it is low. However, HGH usually increases blood sugar when it is low. However, if the amount of HGH in your body increases too much, it can interfere with the action of insulin and cause blood sugar levels to rise.
Does HGH really make you taller?
Yes, HGH can increase the height of children. But that's only before the growth plates in their bones have joined. HGH can't make you taller after the growth plates have joined. Instead, after you've reached your maximum height, HGH helps maintain your body's structure and metabolism.
What are normal levels of HGH?
As I mentioned earlier, the pituitary gland releases HGH in bursts throughout the day. These levels vary depending on the time of day, age, and gender. Therefore, a single blood test to measure HGH is not very useful for diagnosing a condition. Instead, doctors look at HGH levels through special tests (stimulation or suppression tests).
Normal HGH levels are as follows:
- Adult males: 0.4 to 10 nanograms per milliliter (ng/mL)
- Adult women: 1 to 14 nanograms per milliliter (ng/mL)
- Children: 10 to 50 nanograms per milliliter (ng/mL)
But remember, these values can vary slightly from lab to lab. So compare them to the normal range on your lab report. If you have any concerns, be sure to talk to your doctor.
What happens if HGH levels decrease? (Growth Hormone Deficiency)
When HGH levels are lower than normal, we call it Growth Hormone Deficiency . This is usually caused by some problem or damage to the pituitary gland. This can lead to a condition called hypopituitarism . This means that one or more hormones produced by the pituitary gland are reduced. HGH is also a hormone that can be affected in this way.
This HGH deficiency affects adults and children in different ways.
If HGH levels decrease in adults:
If an adult's HGH levels decrease, the following problems may occur:
- Decreased happiness and satisfaction with life.
- Increased body fat.
- Increased risk of heart disease.
- Weakening of the heart, muscles and bones.
In adults, this condition can be caused by a pituitary adenoma (this is not cancer, but a tumor) or damage to the pituitary gland/hypothalamus.
If children have low HGH:
If a child's HGH levels decrease, growth will be stunted. The main symptom is a slow rate of height gain after the child's third birthday. That is, less than 1.4 inches per year. For example, if your child seems much shorter than the other children in the class, you should be concerned.
Additionally, a child with HGH deficiency may also have symptoms such as:
- A face that looks much younger than its age.
- Impaired hair growth.
- Delayed puberty.
Children can be born with this condition. Sometimes the cause is unknown (idiopathic), it can be genetic, or it can be caused by damage to the pituitary gland during pregnancy or at birth. Sometimes it can also be caused by damage to the pituitary gland or hypothalamus later in life.
What happens if HGH levels increase?
The main condition associated with higher than normal levels of HGH is acromegaly . This also affects adults and children differently. It is a very rare condition.
Acromegaly in adults
Adults with acromegaly typically experience enlarged or swollen hands and feet and changes in facial features .
They may also have thicker bones and larger internal organs. They are more likely to develop conditions such as hypertension , type 2 diabetes, and heart disease. More than 99% of acromegaly cases are caused by noncancerous tumors in the pituitary gland called pituitary adenomas . These tumors can produce too much HGH. Acromegaly is most common after middle age, after growth has completed. Therefore, adults with acromegaly do not grow taller. Instead, their bones may thicken.
Acromegaly (Gigantism) in children
Very rarely, children can have high HGH levels before they reach their full height. This can cause excessive growth of the long bones, leading to abnormally tall children. This condition is called juvenile acromegaly . It is sometimes called gigantism . If left untreated, these children can grow to be seven feet tall or taller. They may also experience symptoms such as lethargy, delayed puberty, and headaches.
This is also usually caused by pituitary adenoma.
How are HGH levels measured?
If you or your child have symptoms that suggest they have HGH-related problems, your doctor may order several blood tests to check your HGH levels.
As I mentioned earlier, the pituitary gland releases HGH into the blood throughout the day and intermittently at night. Therefore, it is difficult to accurately understand the situation by taking blood and checking HGH only once.
Therefore, doctors often use methods called growth hormone stimulation and suppression tests to identify conditions caused by HGH deficiency or excess.
Additionally, a blood test can be done to check IGF-1 (insulin-like growth factor 1) levels.
How is HGH used as a medicine?
The United States Food and Drug Administration (FDA) has approved synthetic HGH to treat certain conditions. This synthetic HGH can only be obtained with a doctor's prescription, and it is given as an injection.
HGH is prescribed to children for the following conditions:
- Growth hormone deficiency.
- Conditions that cause short stature, such as chronic kidney disease , Turner syndrome , and Prader-Willi syndrome .
HGH is prescribed for adults for the following conditions:
- Growth hormone deficiency.
- Loss of muscle mass due to HIV .
- Short bowel syndrome .
Very important: Never use synthetic HGH unless your doctor has prescribed it for you.
What are the side effects of synthetic HGH?
Some side effects may occur when using synthetic HGH as a medical treatment. These are:
- Carpal tunnel syndrome (a pinched nerve in the wrist).
- Increased insulin resistance and/or type 2 diabetes.
- Swelling of the hands and feet (edema) .
- Joint and muscle pain.
- Enlargement of breast tissue in men (gynecomastia) .
- Increased risk of some types of cancer.
Researchers still don't have enough information about the long-term effects of synthetic HGH treatment.
When should I see a doctor about HGH levels?
If you or your child have symptoms related to HGH deficiency or excess (e.g., slow growth, enlarged limbs), be sure to see your doctor.
If you are already being treated for an abnormality in HGH levels, it is very important to see your doctor regularly to make sure your treatment is working properly.
HGH is a powerful hormone that is essential for many important processes in our body. Sometimes our pituitary gland can make too much or too little of it. If you or your child has any of these symptoms, it's best to talk to a doctor. They are there to help you.
Final Take-Home Message
Okay, so we talked a lot about HGH today, didn't we? Let's briefly recap:
- HGH is a hormone that is very important for our growth, especially during childhood, and for our body's metabolism.
- This is produced by the pituitary gland in our brain.
- If HGH levels decrease, children may have stunted growth, and adults may also experience various health problems.
- If HGH levels increase, conditions like acromegaly can occur. In children, this can manifest as gigantism, which is abnormally tall.
- If you suspect that you or your child may have a problem with HGH, don't hesitate to seek medical advice.
- Never use synthetic HGH without a doctor's prescription.
Remember, all of this is meant to educate you. If you have any health concerns, only your doctor can provide the best solution. Stay healthy!
` Human Growth Hormone, HGH, Pituitary Gland, Child Growth, Height Gain, Metabolism, Hormonal Imbalance
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