Insulin-like growth factors (IGFs) are complex and interesting because they have tons of potential in helping the body function better. But there are also debates about how much IGF is useful for the body before it starts causing negative effects. To know whether you need more IGF or your body already produces more than enough, it’s important to understand everything about IGF first.
So what exactly is an Insulin-like Growth Factor (IGF)? This group of hormones naturally made by the body used to be called “somatomedin.” They’re produced by the liver for stimulating the growth and development of different bones and tissues in the body. They also possess “insulin-like properties” for reducing blood sugar levels and other functions, but they’re not nearly as powerful as insulin.
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SHOPInsulin-like Growth Factors are several peptide hormones formerly known as somatomedin. They’re responsible for managing the effects of growth hormone in a person’s growth and development. They share this role with other growth hormones like epidermal growth factor (EGF), but IGF also helps reduce the sugar levels in the blood as insulin does.
Having enough IGF in the body helps fight signs of aging and boosts the body’s performance. However, too much IGF in the body might decrease a person’s life span or put them at risk of developing certain types of cancer.
Although IGF displays some properties of insulin, such as reducing the levels of blood sugar in the body, they have some important differences that make one better than the other in some situations. They’re structurally related, but they have different capabilities when it comes to binding with different receptors.
Another important difference is that insulin works much better in controlling blood glucose levels. More research has to be completed first before IGF could even be considered as an alternative to insulin for treating diabetes.
IGF-1 and IGF-2 are two IGFs under the IGF protein family, along with other cell membrane receptors, IGF binding proteins, and signaling proteins. Although they have similar names, they’re easy to differentiate from each other because of the specific actions they cause on the tissues. They also activate different kinds of receptors.
When the IGF-1 binds with the IGF-1 receptor, it stimulates hyperplasia (cell number increase) and hypertrophy (cell size increase). This affects the tissues, muscles, and bones of both children and adults. On the other hand, IGF-2 is more active during fetal development as it helps proliferation (cell growth) and tissue formation. IGF-2 becomes less active after birth.
The levels of IGF in the blood are easily determined by taking blood samples and processing it in the laboratory. IGF-1 testing is usually performed on children who aren’t developing as normal based on their age. But for adults, IGF-1 tests are done to find tumors or diagnose pituitary gland disorders.
Different age groups have different ranges of IGF levels that are considered normal. If the patient’s IGF levels are outside the normal range, it doesn’t necessarily mean that they should be worried. A doctor can explain why this happens after looking at other factors that might affect the levels of IGF in the patient’s body.
From the Insulin-like Growth Factor-1 test, doctors can start performing other tests that help determine if the patient is suffering from one of the following growth hormone disorders:
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SHOPBecause of its role in stimulating cell growth and development, increasing IGF serum levels in the body may provide several benefits like:
IGF-1 is important in stimulating skeletal muscle hypertrophy (increasing cell size). It also functions as a switch to glycolytic metabolism that allows patients to build more strength. IGF-1 also helps activate other channels needed for other kinds of growth factors. It decreases muscle atrophy or muscle wasting by preserving the amount of lean muscles in the body.
Cognitive decline and other brain disorders are common with age as the patient loses more neurons. Having high concentrations of IGF-1 helps elder patients prevent neuronal loss, allowing them to have better cognitive functions even as they age. This hormone also helps boost different executive functions and verbal memory that are used for completing daily tasks.
IGF-1 also reduces the risk of developing Parkinson’s disease. It also protects a person against Alzheimer’s disease by reducing the amount of brain amyloid-betas.
Insulin and IGF-1 help stabilize the blood sugar levels in the body. When patients with type-2 diabetes were treated with IGF-1, doctors found that their blood sugar levels decreased and their insulin sensitivity improved.
IGF-1 signals influence the hair follicle growth cycle as a potent mitogenic and morphogenetic regulator, meaning it affects the survival and growth of cells in the follicles. This hormone also helps in remodeling the follicular tissue. The non-balding parts of the scalp were observed to have normal levels of IGF-1 while the balding areas display less IGF-1 levels in their dermal papillae.
Since IGF-1 plays a huge role in bone growth and bone formation, having normal levels of this hormone in the body helps build bones for better overall bone health. Researchers theorize that IGF-1 boosts the formation and growth of bones by directly affecting osteoblasts. It prevents bone loss in older patients by increasing skeletal muscle protein synthesis.
Fetuses with high concentrations of IGF-1 in their bodies are often larger in fetal size. This hormone is also important for the neurological development of children. The levels of IGF-1 in the blood progressively increase in children as they grow up, peaking around the time they reach puberty. Once the rapid growth of the child is complete, the levels of IGF-1 in their body starts to decrease.
If a doctor thinks that the patient needs additional IGF in their blood, one of the most common ways to increase their levels is to take supplements. But like other medications, these supplements come with certain risks so it’s important to only take them as the doctor directed.
Many dietary and health supplements in the market contain different kinds of growth hormones like IGF. These products are often advertised for anti-aging, energy building, muscle growth, and immune system improvement. Before taking IGF supplements, make sure to consider both the benefits and the possible side effects of these medications.
Benefits of Taking IGF Supplements
Possible Side Effects of IGF Supplements
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SHOPMaintaining the patient’s optimal health involves having moderate levels of IGF-1, not too much nor too little. The recommended levels of IGF in the body depend on the patient’s gender and age – males often need higher concentration than females and adolescents should have more IGF that slowly tapers off as they enter adulthood.
Activities that Help Increase IGF-1 Levels
Activities that Help Decrease IGF-1 Levels
Although IGF offers benefits for the body, patients should only start taking supplements after a consultation with a healthcare professional. Too much IGF levels are associated with certain complications, but having the doctor’s guidance can help reduce these risks while ensuring that patients achieve optimal health.
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