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During intense workouts, the overriding goal is often to build up muscle tissue. Of course, proper diet and recovery are crucial (in addition to exercise). Sometimes, however, it is difficult to carry out your plans without additional support. It is even more difficult to find a solution that will not cause dangerous side effects.

The answer to these needs is precisely peptides for mass. You can also supply yourself with these substances, which are naturally occurring in the human body. They will assist you in building lean muscle tissue, as well as stimulate your appetite.

Which peptides for mass to choose?

Among the peptides for mass, insulin-like growth factor, or IGF-1, is by far the king. It is one of the endocrine hormones produced in the liver. The release of this hormone increases in the presence of HGH (growth hormone).

IGF-1 is one of the best growth factors that facilitates overall cell growth and is able to target specific tissues. It also participates in important intercellular communication processes and facilitates cell division.

Most important benefits of HGH (somatotropin)

Benefits of insulin-like growth factor include:

  • improved muscle strength - due to stimulation of collagen synthesis in muscles,
  • positive effects on metabolism, including accelerated fat reduction and increased lean body mass,
  • enhancing the regenerative properties of nerve tissues in the body,
  • strengthening bones by increasing their mineral density,
  • faster wound healing.

The gains associated with taking this peptide are not due to water gain in muscle cells, as is the case with steroids. Its effects are definitely more long-term, as well as safer.

Importantly, HGH is involved in the process of hyperplasia, ie. growth and development of new muscle cells, rather than solely in the process of increasing the size of existing cells.

Peptides for mass - types of growth factors

There are two groups of growth factor variants. These are IGF-1 LR3 orz DES IGF-1. The reason for their development was the short half-life of IGF-1 itself.


The half-life of this variant is as long as 20-30 hours, which is much better than the results of IGF-1. Since it can be maintained in the body for more than one day, it effectively binds to muscle cell receptors and activates cell-to-cell communication. This simply leads to an improved rate of muscle growth

IGF-1 LR3 also inhibits the flow of glucose into cells, making it easier to burn fat - your body will use it for energy. Among its big advantages is also its simple application, as you only need to take it once a day.


This shorter version of the IGF-1 basic chain is five times more potent than it. The half-life is about 20-30 minutes after subcutaneous topical administration into the muscle currently being trained. DES IGF-1 has a higher muscle-growth capacity than the above-described IGF-1 LR3. It can also be used longer and more frequently without causing fluctuations in blood glucose.

Growth hormone analogues

The best peptides for mass include growth hormone analogues, including GHRP-2. It can work synergistically with GHRH and further assist you in building muscle mass.


This ghrelin analogue releases human GH (from growth hormone-releasing peptide GHRP). According to studies, it has the ability to stimulate the pituitary gland, triggering up to a 15-fold increase in somatotropin secretion.

GHRP-2 does not act on the GHRH receptor itself, but acts on the receptor that stimulates growth hormone secretion. It delivers a signal to the body to start secreting growth hormone, while blocking somatostatin, which inhibits the release of the hormone. In our store you can also find GHRP-2 in combination with MOD GRF.

Because of its relatively short half-life (tens of minutes) it must be administered 2-3 times a day.

Why is growth hormone release so important?

Released GH shows positive effects on many areas of the body. Among other things, it can:

  • stimulate lipolysis, which is the breakdown of fat cells and acceleration of their metabolism,
  • regulate the secretion of hormones: prolactin and lutropin,
  • influence steroidogenesis and carbohydrate metabolism,
  • increase appetite, thus facilitating weight gain,
  • increase the ejection fraction of the heart, thereby increasing its efficiency,
  • regulate vascular tone and blood pressure,
  • improve gastrointestinal motility.

What to look for when buying peptides for mass?

Peptides are substances that are not worth buying at random. The main reason for this is that their concentrations can vary depending on the products you choose - by buying untested items, you run the risk that these items won't have any results.

To make sure our customers are confident in choosing the right peptides, as Biolab we provide concentration studies of all available products on the store's website. If you want to familiarize yourself with them, take a look at the Studies tab. Please also remember to store your peptides properly and always use them according to the manufacturer's recommendations.