The Ultimate list of Peptides for Muscle Growth

Peptides for Muscle Growth

Peptides are the new super performance agents. They build muscle, lose fat, improve performance, heal your body and have minimum side effects. How cool is that? Lets cover the best peptides for muscle growth and get growing!

Muscle building peptides

The world of peptides is vast. But there is a category of peptides called hormonal peptides which are used for muscle growth.

How peptides grow muscle

Bodybuilding peptides help in growth of muscle. Here is how they work

  1. They stimulate the release of Growth hormones. Higher GH level in our body leads to muscle growth and increased fat loss.
  2. They increase the level of IGF-1 in our blood stream. Higher IGF-1 levels in our muscles lead to muscle growth.
  3. They improve the recovery of our muscle 
  4. Some peptides also affect the cortisol levels (Stress hormone) – thereby affecting muscle growth.

How muscle building peptides work

Most of the muscle building peptides stimulate Growth hormone production. However, the difference lies in the way they do this. There are three key pathways

  1. Some peptides activate the Ghrelin receptors for GH stimulation
  2. Some peptides activate the GHRHR – Growth hormone release Hormone Receptors and stimulate GH
  3. There are also some categories of peptides which affect the pituitary gland to release GH but their exact pathway is not determined.

Types of Peptides for muscle growth

There is a category of peptides known as Growth hormone secretagogues of GHS. These hormones affect the release of growth hormone in our body

These can be categorized as

  1. GHRH – Growth hormone releasing hormones
  2. GHRP – Growth hormone releasing peptides
  3. Peptides similar to Ghrelin

There are several types of peptides, of particular interest for bodybuilding are hormonal peptides. Because they affect natural hormones inside our body.

Best peptides for muscle growth


Sermorelin is a GHRH or growth hormone releasing hormone. It stimulates the GH release and increases IGF-1 production.

Typical dosage of sermorelin for muscle growth varies from .2 to .3 mg. Besides muscle growth, sermorelin also helps in fat loss, increased recovery, better sleep and improved skin elasticity.

Sermorelin cycle for muscle growth

Typical cycle for sermorelin lasts for 3 months. Longer cycle may cause unnecessary side effects

Sermorelin dosage – .2 to .3 mg/day

CJC -1295

CJC 1295 is also a GHRH. It stimulates the pituitary gland to release growth hormones. 

It has a higher life cycle than normal GHRH, around 5 to 8 days. CJC 1295, also increases IGF-1 production in the liver, which leads to higher muscle gain.

It also helps in regulating cortisol hormone.

Typical CJC-1295 muscle building cycles last for 8 to 12 weeks. With a daily dosage of 200 to 800 mcg. 


Ipamorelin works differently from GHRH. It binds to the natural hormone Ghrelin receptors. It increases the GH level in the bloodstream. Ipamorelin has a shorter half life of 2-3 hours. This means you need to take frequent dosage.

Ipamorelin acts as a muscle building peptide, it increases muscle protein synthesis and reduces muscle breakdown.

Ipamrolein may also help with recovery by promoting tissue repair and reducing inflammation.

Typical dosage of Ipamorelin is 100 to 300 mcg per shot. 


Hexarelin is a muscle growth peptide. It is classified as Ghrelin mimetic, meaning it binds to Ghrelin receptors and stimulate GH release

Hexarelin is used to promote muscle growth, faster recovery and fat loss.

It has much shorter half life 30 mins to 1 hour so you may have to administer it twice a dya.

Average dosage for bodybuilding is 100 to 200 mcg. 

Peptides for muscle growth, are they safe?

Although peptides are generally considered safe, there is limited research in the application of peptides for long term usage. Common side effects of peptides include increased appetite, elevated blood sugar, and water retention.

Peptides may cause allergic reactions to some people. 

Are peptides legal to use?

Whether the peptide you want to use is legal, depends on the substance, how you are using it and your respective country.

Some peptides are legal and approved by the FDA and you can use them. For other peptides you may have to obtain a prescription from a doctor.

Peptides for muscle growth : final thoughts

Peptides have some side effects and safety concerns. But they are definitely safer than anabolic steroids or growth hormones. If you want the edge in your physique, improve muscle, drop body fat and improve performance then peptides are definitely worth trying.


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