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A Men's Health Clinic Specializing in Treating Low-T & ED : Available Online
Human Growth Hormone Peptides
(Ibutamoren Mesylate, MK-677)
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Getting Started with Ibutamoren Mesylate
What is Ibutamoren Mesylate?
Ibutamoren mesylate, also known as MK-677, is a growth hormone secretagogue and an agonist of the ghrelin receptor. Ibutamoren Mesylate was developed as an oral acting, high affinity and long-lasting growth hormone (GH) secretagogue. Growth hormone secretagogues are a type medication that selectively stimulates natural growth home release and increases levels of IGF-1.
Adult males with growth hormone deficiency who take Ibutamoren Mesylate will experience a sustained increase in the pulsatile release of human growth hormone and a subsequent rise in IGF-1 levels.
What are the benefits of Ibutamoren Mesylate?
In men with growth hormone deficiency, the use of Ibutamoren Mesylate can significantly increase growth hormone levels. Increasing growth hormone levels can:
- Promote anabolism (protein synthesis)
- Reduce catabolism (the breakdown of protein and muscle tissue)
- Increase lean body mass
- Reduce fat mass
- Obtain more restful and deeper sleep
- Decrease low-density lipoprotein (bad cholesterol)
How is Ibutamoren Mesylate used?
Ibutamoren Mesylate is an oral tablet that is ingested daily.
How does Ibutamoren Mesylate increase Human Growth Hormone (hGH) levels?
Ibutamoren Mesylate (MK-677) provides a substantial and sustained increased release of Human Growth Hormone (hGH) in men with growth hormone deficiency. MK-677 works by stimulating Ghrelin releasee. Ghrelin was first identified and isolated in 1999. Ghrelin is a hormone that is released by the stomach and small intestine to increase appetite in states of hunger. Ghrelin also acts on the anterior pituitary axis to increase the pulsatile release of hGH. It is by this mechanism that MK-677 improves hGH release.
Who should not take Ibutamoren Mesylate?
Ibutamoren Mesylate is for men with a diagnoses of growth hormone deficiency and as a treatment for wasting syndrome. Through existing studies there is support for the benefits of Ibutamoren to increase IGF-1 and Growth Hormone levels in men with growth hormone deficiency. Beneficial effects of Ibutamoren include improvement in muscle conditions, rise in testosterone levels, improvement in appetite, sleep and adiposity changes.
Long term use of Ibutamoren can increase the risk of hyperglycemia while other long term adverse effects are unknown given the lack of well performed and substantial studies.
Any individual who has had an allergic reaction or contraindication to taking the medication should refrain from usage
How is Ibutamoren Mesylate therapy monitored?
Men who have a chronic wasting condition and/or growth hormone deficiency and are undergoing therapy with Ibutamoren Mesylate are monitored through regular physical examinations for changes in body composition and measurement of IGF-1 levels. Other monitored parameters include but are not limited to Hemoglobin A1c, glucose, cortisol, and liver function tests.
What are the side effects of Ibutamoren Mesylate?
While growth hormone releasing peptides are generally safe, there is very limited data and the current studies are of small size to fully understand their side effect profile. From what studies have been performed to date, the most common side effect of Ibutamoren Mesylate reported has been a transient increase in appetite. The initial increase in appetite lasts for approximately 2-4 weeks and then subsides.
Men with growth hormone deficiency often have a decrease in muscle mass and muscle wasting. The increase in appetite can improve lean muscle mass if a healthy diet rich in protein is utilized. Other side effects include hyperglycemia, transient increases in cortisol prolactin, stomach ache, dizziness, lower extremity edema and transient increases in liver function tests (LFTs).
How long does Ibutamoren Mesylate take to work?
In clinical studies, at a dose of 1mg/kg, growth hormone levels were found to increase 9-fold over an eight hours period, and IGF-1 levels were found to rise 30% at 8 hours after ingestion. Men taking Ibutamoren Mesylate may experience improvement in the signs and symptoms of growth hormone deficency before 3 months of therapy.
Information about Human Growth Hormone (hGH)
What is Human Growth Hormone (hGH)?
Human Growth Hormone (hGH) is also known as Growth Hormone (GH) or Somatotropin. Growth hormone is responsible for maintaining lean body mass, organ growth, reducing fat mass in adults (lipolysis), enhancing exercise endurance and improving oxygen uptake. The use of exogenous HGH has a variety of physiological properties that are beneficial for the adult male.
hGH is produced and released by the anterior pituitary gland and is under direct control of Growth Hormone Releasing Hormone (GHRH) and Somatostatin (GH inhibiting hormone).
In the human body, hGH is released into circulation in a pulsatile fashion approximately every 90-120 minutes and with greater frequency of release during sleep. HGH levels are highest during puberty and slowly decline as men age.
hGH activity is assessed by measuring insulin like growth factor (IGF-1).
Because of the beneficial anabolic effects of hGH, adult males have utilized hGH replacement to replenish hGH levels that naturally decrease with age. In men who have low hGH levels, replacement can improve bone mineral density, muscle strength and size, promote fat loss, increase lean body mass, enhance immune function, quality of life, exercise tolerance and have effects on skin tone
While many of these androgenic effects of hGH have are attractive to men, the use of hGH is restricted by the FDA to a few medically necessary conditions and include:
- HGH deficiency in childhood
- Hypopituitarism
- AIDS wasting syndrome
- Short bowel syndrome
Alternative and safer therapies have been developed to increase the body’s natural secretion of hGH in men who have hGH deficiency. Growth hormone secretagogues are an alternative therapy to exogenous growth hormone replacement, that can improve hGH levels safely.
What stimulates Human Growth Hormone (hGH) release in our body?
There are two signalizing hormones called Growth Hormone Releasing Hormone (GHRH) and Ghrelin that stimulate hGH release from the pituitary gland. GHRH is released by the hypothalamus and ghrelin is released by the small intestine and stomach.
Ibutamoren mesylate is a medication that stimulates ghrelin receptors located in the stomach and small intestine to signal natural hGH release in men who have growth hormone deficiency.
What is the most common cause of Growth Hormone Deficiency (GHD)?
Human growth hormone levels decrease as a man ages. The most common cause for a deficiency of human growth hormone is from a pituitary adenoma treated with surgery or radiotherapy. Predicting growth hormone deficiency (GHD) can be made by measuring IGF-1 levels. The gold standard to confirm (GHD) is an insulin tolerance test (ITT).
What are Growth Hormone Secretagogues?
Growth hormone secretagogues also called growth hormone releasing peptides (GHRPs) are peptides that stimulate the body’s natural release of growth hormone. GHRPs are composed of 6 amino acids that stimulate natural growth hormone release without affecting other pituitary hormones or receptors. Unlike exogenous hGH, growth hormone releasing peptides have a lower side effect profile and can still produce many of the benefits of exogenous hGH administration in men with growth hormone deficiency.
Growth hormone secretagogues may offer an advantage, promoting the natural and pulsatile release of hGH compared to exogenous hGH administration. Examples of growth hormone secretagogue include Imbutamoren Meyslate and GHRP-6 (Hexarelin).
What is IGF-1?
IGF-1 is short for insulin like growth factor. IGF-1 is a hormone that mediates human growth hormone activity. The majority of IGF-1 is secreted by the liver and regulated by nutrient intake, growth hormone, thyroid hormone, cortisol and among other hormones. IGF-1 is an important growth hormone that has both anabolic and linear growth promoting properties. IGF-1 is necessary for physiological growth hormone production and exerting growth hormone like effects on target tissues and organs.
Why do we measure IGF-1?
IGF-1 is measured to assess the activity Human Growth Hormone (hGH). While IGF-1 levels are dependent on a variety of other factors that include nutritional status, muscle mass, body fat, thyroid hormone levels and growth hormone levels, IGF-1 is a good screening tool for growth hormone deficiency. IGF-1 levels are useful to assess human growth hormone excess and/or response to therapy.
How does Testosterone regulate Human Growth Hormone (hGH) and IGF-1?
Testosterone stimulates the pulsatile release of human growth hormone (HGH) from the anterior pituitary and increases insulin like growth factor (IGF-1) concentrations in the body. IGF-1 is also known inhibit sex hormone binding globulin (SHBG) thereby increasing free and available testosterone. Testosterone stimulates muscle growth by promoting the fusion of human skeletal muscle cells into larger myotubules. IGF-1 is present in muscle tissue and is partially responsible for the increase in growth and fusion of skeletal muscle cells to form larger muscle tissue. IGF-1 and testosterone have an integral role in skeletal muscle tissue growth and enlargement.
What is the difference between synthetic Human growth hormone (hGH) and growth hormone secretagogues?
Human Growth Hormone (hGH) is a hormone the body natural secretes from the anterior pituitary gland to stimulate bone growth, promote lean body mass, reduce fat mass, maintain organ size, regularte glucose and lipid metabolsm and maintain other roles in human physiology and bodily functions.
In 1985 synthetic hGH was developed and approved by the FDA for very specific and narrowly defined medical indications. There are two forms of synthetic hGH: Somatropin and Somatrem. Somatropin is similar and identical in molecular structure to the naturally produced hGH from the anterior pituitary. Somatrem has an additional amino-acid, but is otherwise similar to endogenous pituitary derived hGH.
The use of hGH can have several adverse side effects including fluid retention, edema, carpal tunnel syndrome, muscle pain, abnormal skin sensation and possible exacerbation of pre-existing malignancy.
Several FDA approved injectable preparations of synthetic hGH exist and include: Genotropin ®, Humatrope ®, Norditropin ®, Nutropin ®, Saizen ®, Serostim ®.
Synthetic hGH preparations are approved by the FDA for a diagnosed medical condition and require a supervising physician. In adult males, synthetic hGH use is approved for wasting syndrome of AIDS and hGH deficiency.
A growth hormone secretagogue is a medication, available only by a prescription, that stimulates the body to release natural HGH. A growth hormone secretagogue is not a synthetic form of hGH, but rather a medication that stimulates the body to release its own supply of hGH. This mechanism of actions can provide a more physiological release of hGH and maintain hGH levels within a safe parameter while improving the sings and symptoms of growth hormone deficiency in men.
What are Growth Hormone Release Peptides (GHRPs)?
Growth Hormone Releasing Peptides are a type of Growth Hormone Secretagogue and were first synthesized in 1977 to stimulate natural Growth Hormone (GH) release from the anterior pituitary. The first Growth Hormone Release Peptide with significant in-vivo activity was GHRP-6. GHRP-6 mimics the activity of Growth Hormone Releasing Hormone (GHRH) to stimulate the pituitary to release GH. GHRP-6 has a very short half-life of only 20 minutes and has the benefits of restoring GH secretion and improving sleep. Other GHRPs include GHRP-2 and Sermorelin.
What is Sermorelin?
Sermorelin, also known as a growth hormone releasing factor 1-29NH2- Acetate, is a an analogue to growth hormone releasing hormone (GHRH). Sermorelin is administered as a subcutaneous injection nightly. Sermorelin stimulates a patient’s own pituitary gland to release endogenous hGH. The advantages of Sermorelin compared to exogenous hGH administration are the following:
1.Sermorelin stimulates endogenous hGH release and is still under the negative feedback control of somatostatin. Compared to exogenous hGH in which over dosing is possible, Sermorelin is a safer alternative given there is a finite amount of hGH that body can release at any one time.
3.Tachphylaxis often observed with exogenous hGH administration is avoided.
What is Wasting Syndrome?
Wasting syndrome is the unwanted loss of more than 10 percent of a man’s body weight. Wasting syndrome can occur from a variety of conditions that include, but not limited to, advanced HIV disease, inflammation, infection or aging. Growth hormone secretagogues can be an effective treatment to reverse wasting conditions and improve strength, muscle size, maintain lean body mass, improve proper fat deposition in patients with lypodystrophy and improve frailty.
What are the effects of Human Growth Hormone Deficiency in adult males?
The signs and symptoms of adult’s males with growth hormone deficiency include:
- Obesity
- Altered body composition (abnormal fat deposition)
- Reduced lean body mass
- Reduce strength
- Fragility
- Increased fat mass
- Reduced total body water
- Reduced cardiac performance and function
- Reduced physical performance and endurance
- Abnormal lipid parameters
- Reduced well-being and quality of life (QOL)
Benefits of GH-elevation in patients with GH-Deficiency:
- Restoration of lean body mass
- Improvement in fat deposition
- Improvement in plasma lipid profile
- Enhanced exercise capacity
- Efficient protein synthesis for muscle growth
- Eeduce frailty
- Emprovement in quality of life (QOL)
- Increase total body water content