
Vaginal Health: Microbiome, Hygiene and Natural Balance
August 17, 2026Peptides: What Are They, Really?
Peptides are short chains of amino acids that work as biological messengers inside the body. Below, Dr. Melissa Perfetto explains what they are, how they act, and what the most common peptides are used for in functional and regenerative medicine.







Article summary
Peptides are bioactive molecules made of short chains of amino acids, the building blocks that give rise to proteins. They work as biological messengers: they carry signals between cells to regulate essential processes such as tissue repair, hormone production, the immune response and metabolism. They act by binding to specific receptors, and each peptide has a unique mechanism of action, which makes it possible to tailor treatment to each patient’s needs.
BPC-157
Associated with tissue repair and recovery. It is used as support in musculoskeletal injuries and healing processes: muscles, tendons and ligaments, modulation of the inflammatory response, gastrointestinal health, and the formation of new blood vessels (angiogenesis).
Ipamorelin / CJC-1295
Stimulates the natural release of growth hormone (GH). It supports muscle recovery, better body composition, sleep quality and regulated IGF-1 levels, with less impact on cortisol than other secretagogues.
GHK-CU
Recognized for its effect on the regeneration of skin, connective tissue and hair follicles. It stimulates collagen production, improves elasticity, provides antioxidant properties and may support hair growth.
Sermorelin
Stimulates the natural production of growth hormone by acting on the pituitary gland. It supports muscle recovery after exercise, restorative sleep, the maintenance of muscle mass and energy levels.
Thymosin Alpha-1
A peptide with immunomodulatory action that helps regulate and strengthen the immune system response, improving T-lymphocyte function and the balance of the inflammatory response.
AOD-9604
Derived from a fragment of growth hormone, designed to support fat metabolism without significantly affecting glucose levels. It is used as a complement in weight-loss and body-composition programs.
NAD+
An essential coenzyme present in every cell, key to energy production, mitochondrial function, DNA repair and cellular metabolism. Its levels decline with age, which is associated with fatigue and slower recovery.
Semaglutide
Mimics the action of the GLP-1 hormone: it regulates appetite, increases satiety and slows gastric emptying. It is used in the management of overweight, obesity and type 2 diabetes, combined with changes in diet and lifestyle.
Tirzepatide
Activates the receptors of the GIP and GLP-1 hormones. Thanks to its dual mechanism of action, it may support greater weight loss and improvements in metabolic health in selected patients.
PT-141
Acts on melanocortin receptors in the central nervous system, influencing the pathways related to sexual desire and response. It is considered in cases of low libido or difficulty with arousal.
This content is educational in nature and does not replace a medical consultation. The use of peptides should be evaluated individually with a healthcare professional. Learn about our peptide therapy and regenerative medicine at Perfetto Salud Integral.


