As an extra note, there are a few things that should be mentioned about increased prolactin and cortisol levels when using certain peptides. My experience is with even high and frequent doses cortisol was raised but nothing to be alarmed about. Also, some peptides are sensitive to foods interfering with the peptides ability to take effect. Therefore, a safe rule of thumb is to not eat 30 minutes before and after dosing to make sure that no foods are facilitating the breakdown of these peptide chains upon subcutaneous or intramuscular injection.

Effect of GHRP-6 on the left ventricular ejection fraction in an experimental model of dilated cardiomyopathy (DCM). Echocardiography data were derived from our DCM model including the prevention and the regression study protocols in rats.35 The prevention protocol conceived the concurrent administration of GHRP-6 as part of a prolonged treatment with doxorubicin. The concomitant GHRP-6 completely prevented cardiac function failure evaluated as the percentage of ejection fraction by echocardiography. The regression approach examined the GHRP-6 intervention once LVEF was already deteriorated. As shown, the therapeutic administration schedule introduced a full functional recovery of cardiac muscle. Data corresponding to percentage of ejection fraction (%EF) are represented as a mean value ± standard error of the mean for each experimental group. (*), (**), and (***) represent the statistically significant differences between groups treated either with placebo or GHRP-6, according to Student’s t-test.
For example, there are Growth Hormone Releasing Peptides (GHRP’s with names such as ipamorelin and hexarein) which allow for a slow and steady growth hormone release that produces a pulse which mimics natural growth hormone release times and Growth Hormone Releasing Hormones (GHRH’s such as Mod-GRF) for an even stronger natural release of growth hormone and greater presence of growth hormone precursors known as GH “frags” or fragments.
However, both the original GRF (1-29) and the Mod GRF 1-29 required frequent dosages. So a new compound called CJC-1295 was created which was far more stable. This compound was made by adding Lysine – which is a non-peptide, and is also called Drug Affinity Complex or DAC. Since the original Mod GRF 1-29 does not contain DAC, it is named as CJC-1295 without DAC. However, the actual CJC-1295 is not only difficult, but also very expensive to produce. This is why it is not produced or used extensively. The Mod GRF 1-29 is far easier and cheaper to produce.
A seminal report by a Merck Research Laboratories group dated 2003 demonstrated for the first time that chronic treatment with GHRP-6 (21 days) prevented sudden death in a canine model of DCM and subsequently subjected to acute myocardial infarction (AMI). In the meantime, the mortality rates for the vehicle and GH-treated groups were about 50%. Although the authors do not precise the mechanism underlying the 100% survival in the GHRP-6 group, an enhanced regional myocardial compensatory function of the nonischemic zone was assumed.40 This notion could be validated at least in part by the fact that the cardiotropic effects shown by GHRP-1, GHRP-2, GHRP-6, and hexarelin in cardiomyocytes and isolated, denervated, perfused hearts are mediated by an elevation of Ca2+ influx through the voltage-gated calcium channel, triggering Ca2+ release from thapsigargin-sensitive intracellular stores, which translated in a positive inotropic response without a chronotropic effect.41 More recent data confirm the ability of hexarelin and other secretagogue peptides that bind and activate the GHS-R1a, to control the cardiac action potential and reduce apoptosis of cardiomyocytes, derived from isolated hearts subjected to ischemia/reperfusion episodes.42
Now, you may have heard many bodybuilders saying that when you take GHRP-6 that they get a huge and very intense increase in appetite, about 20 mins after the initial injection. Well, this is caused by the GHRP-6 antagonising the peptide Ghrelin, it mimics it, but, in reality, it actually fights against it causing the signal for gastric emptying and hunger. Ghrelin is what many believes causes obesity, and insulin resistance amongst other things, and I believe this is one way by which GHRP-6 may help reduce fat, by fighting against it. However, there is always a but, if you take more than 150mcg the effects of the gastric emptying can be so strong that you may have the urge to severely stuff yourself with food, so if you're on a bulking cycle this is a great side effect, and, considering the price, it's a very cost-effective one. Therefore, during a bulking run, I rate this as the number one aid in increasing appetite, as you also get very a good anabolic effect and increased strength.
These compounds may be considered an improvement on GHRH in terms of ability to induce growth hormone secretion. GHRP, it is thought, causes secretion of greater amounts of GH in the body. Unlike in the case of GHRH, you do not need to aim at specific times to take advantage of pulse produced by your body. Growth hormone releasing peptides produce growth hormone burst practically any time you take them. They are also available in different types, including the following:

The original GRF (1-29) has a half-life of about 30 minutes. Half-life means the time within which half of the hormone administered will be destroyed within the body. This short half-life is due to the fact that the compound is highly unstable and breaks down soon. To increase its stability and to make it last longer, it was modified by adding 4 amino acids in its structure. This gave it the name Modified GRF (1-29) or Mod GRF 1-29. It was originally invented by DatBtrue. The portion of the molecule that actually stimulates the growth hormone secretion is found in the chain of 29 amino acids, so it is named GRF (1-29). This chemical also produces slow-wave sleep.
One submission was received, which did not support the delegate's interim decision, as available data support that the fixed dose paracetamol/caffeine combination product provides clinically meaningful efficacy over paracetamol alone; has an excellent safety profile; a very low risk of nephrotoxicity, toxicity in overdose, misuse, abuse or illicit use; and a highly favourable risk/benefit profile.

Ghrelin is a potent stimulator of growth hormone secretion from the anterior pituitary gland. The ghrelin receptor is a G protein-coupled receptor, known as the growth hormone secretagogue receptor. Ghrelin binds to the GHSR1a splice-variant of this receptor which is present in high density in the hypothalamus, pituitary as well as vagal afferent cell bodies and vagal afferent endings throughout the gastro-intestinal tract.

Peptidyl and nonpeptidyl GHSs are active when administered by intranasal and oral routes, are more potent on a weight basis than GHRH itself, are more effective in vivo than in vitro, synergize with coadministered GHRH and are almost ineffective in the absence of GHRH, and do not suppress somatostatin secretion. Prolonged infusions of GHRP amplify pulsatile GH secretion in normal men. GHRP administration, like that of GHRH, facilitates slow-wave sleep. Patients with hypothalamic disease leading to GHRH deficiency have low or no response to hexarelin; similarly, pediatric patients with complete absence of the pituitary stalk have no GH secretory response to hexarelin.
Broadly speaking, it’s long been a widespread view that fasting can in many instances provide healthful effects beyond simple fat loss. It’s speculative to say that increased ghrelin levels must be a major cause of such effect (if granting the effect), but it’s entirely consistent with the scientific literature that such elevation of ghrelin levels may have health benefits. Appropriate-dosed and cycled GHRP use may at least partially provide such benefits, particularly with regard to anti-inflammatory and healing effect.

The topic of Growth hormone (GH) can leave you wondering: is it a good, or a really bad thing? Look into the cold science of it and you’re left with a sweet and sour aftertaste of indecision from weighing up the risk-reward ratios with each cyberspace headline swaying the balance of power like a tabloid romance. Why the fascination? Well, over the years growth hormone (GH) has garnered celebrity status, not just in the world of exercise, but on the crimson rug too, since becoming a must-have for Hollywood A-listers who need to look their best. Taking it regularly gives you a more youthful appearance, serves up more energy, burns fat and improves muscle tone. The $10,000+ per year price tag does nothing to harm its appeal with the elite either. However, a more affordable and potentially no-less effective substitute, in the form of growth hormone releasing peptide-6 (GHRP6), is offering the injectable fountain of youth option to the man on the street. Seeing the word peptide in its name, means its made up of 28 tiny amino acids – the building blocks of a complete protein – that acts like a self-inflicted punch to the kidneys to your natural supplies of this powerful health elixir. Yes, it does reside in a legal grey area, and we certainly don’t condone its use or suggest you use it. Instead, this article is about giving you scientifically sound information on the latest developments in supplements. So, caveats aside, keep reading to learn about this provocative supplement.