What are Peptides?

Peptides are short chains of amino acids linked together by peptide bonds. In scientific literature, they have been considered key biomolecules involved in regulating numerous physiological processes—from growth and recovery to metabolic control and cellular communication. Depending on their length and structure, they are classified as dipeptides, tripeptides, oligopeptides, and polypeptides.


In recent years, peptides have attracted increasing attention in the fields of molecular biology, medical research, sports science, and cosmetology, becoming the focus of a number of innovative studies.


Main Functions of Peptides

In scientific research, peptides have been observed to participate in:

  • Hormonal regulation – supporting growth hormone secretion and metabolic balance.

  • Regeneration and recovery – stimulating cell growth, angiogenesis, and collagen synthesis.

  • Metabolic support – influencing appetite, glucose tolerance, and fat breakdown.

  • Cosmetic and dermatological research – supporting collagen synthesis and skin elasticity.

  • Neurophysiological processes – potential effects on sleep, stress, and cognitive function.


Categories and Examples of Peptides

Peptides for Growth Hormone Stimulation

This group has been the subject of numerous studies aimed at endogenous GH secretion (Growth Hormone):

  • GHRP-6 and GHRP-2 – used in research to stimulate growth hormone release.

  • Ipamorelin and Hexarelin – selective peptides studied for controlled stimulation without increasing prolactin or cortisol.

  • CJC-1295 and Sermorelin – analog peptides observed to support pulsatile GH release.


Metabolic and Weight Loss Peptides

Research in this group has focused on appetite, glucose metabolism, and energy balance:

  • Semaglutide – a GLP-1 agonist, studied for appetite and glucose regulation.

  • Tirzepatide – a dual GLP-1/GIP agonist, investigated for metabolic regulation.

  • Retatrutide – a triple GLP-1/GIP/Glucagon agonist, described in literature as a peptide with potential multi-receptor effects.

  • HGH Frag 176-191 – used in scientific experiments to study lipolytic processes.


Regenerative and Recovery Peptides

These peptides have been studied for supporting regenerative processes, angiogenesis, and healing:

  • BPC-157 – a peptide considered for stimulating tissue and tendon recovery.

  • Thymosin Beta-4 and TB-500 – analogs associated with cell migration and regeneration.

  • Thymosin Alpha-1 – investigated for immunomodulatory properties.

  • Epitalon – a peptide considered in the context of cell renewal and antioxidant activity.


Cosmetic and Anti-Aging Peptides

This group includes peptides observed in dermatological and cosmetic research:

  • GHK-Cu – a copper tripeptide, documented for stimulating collagen synthesis and skin recovery.

  • IGF-1 LR3 – investigated for cell growth and anabolic activity.

  • Melanotan II – an MC1R receptor agonist, studied for increasing melanogenesis.

  • PT-141 (Bremelanotide) – investigated for neuropeptide effects related to libido.


Neuropeptides and Modulating Peptides

  • DSIP (Delta Sleep-Inducing Peptide) – a peptide mentioned in literature as a potential regulator of sleep and stress.


Storage and Stability

In scientific practice, peptides have been stored at low temperatures (usually 2–8°C or below -20°C), protected from light and moisture, to ensure their stability and activity. The storage period at temperatures of 2–8°C is 2 years.


Conclusion

In modern science, peptides hold a leading position as molecules with a wide spectrum of action – from cell regeneration and metabolic control to aesthetic and neurophysiological research.

Each of them possesses a unique mechanism and biological potential, making them a valuable tool for scientific research and laboratory experiments.

With growing interest and ongoing studies, peptides continue to unveil new possibilities for the future of biotechnology and medicine.