Peptides are short chains of amino acids, the building blocks of proteins. They play crucial roles in various physiological functions within the body. 

There are numerous peptides with various names, each serving specific functions within the body or in the context of certain products. Here are some well-known peptides:

Melanotan II (MT-II): Often used for tanning purposes and may influence appetite and libido.
GHRP-6 (Growth Hormone Releasing Peptide-6): Stimulates the release of growth hormone, promoting muscle growth and fat loss.
Ipamorelin: Another growth hormone releasing peptide, known for its potential anti-aging effects and muscle-building properties.
Hexarelin: A synthetic growth hormone secretagogue, similar to GHRP-6.
CJC-1295 (Modified GRF 1-29): Extends the release of growth hormone and is often used for muscle mass and fat loss.
BPC-157 (Body Protective Compound): Believed to promote healing and tissue repair, including muscles, tendons, and ligaments.
TB-500 (Thymosin Beta-4): Associated with promoting healing and recovery in muscles, tendons, and joints.
IGF-1 (Insulin-like Growth Factor-1): A peptide with anabolic effects, crucial for growth and development.
Selank: Explored for its potential anxiolytic (anxiety-reducing) effects.
Semax: Investigated for its potential cognitive-enhancing and neuroprotective properties.

These are just a few examples, and the use of peptides should always be under the supervision of a healthcare professional. Additionally, regulations regarding the sale and use of peptides can vary by region, and it’s important to adhere to local laws and guidelines.