What are peptides? A guide for researchers

What are peptides?

Peptides are short chains of amino acids, the same building blocks that make up proteins. Where a protein often contains hundreds of amino acids, a peptide usually has between 2 and 50, held together by peptide bonds.

Peptides vs proteins

The main difference is size. Shorter chains are easier to make synthetically and to analyse, which is why peptides are a common research tool in biochemistry and cell biology.

Common research peptides

• [BPC-157](/catalog/bpc-157)
• [TB-500](/catalog/tb-500)
• [GHK-Cu](/catalog/ghk-cu)
• [Retatrutide](/catalog/retatrutide)
• [Semaglutide](/catalog/semaglutide)
• [Melanotan II](/catalog/melanotan-ii)

What to look for when buying

• Purity: ask for certificates of analysis (COA) from independent labs. Ours are under [Lab results](/lab-results).
• Storage: peptides are sensitive to heat and light and should be kept cool.
• Delivery: choose a supplier that ships to your country with tracking.

Buying peptides in Europe

Nordica Labs ships to the EU and Norway with tracked delivery. Every product comes as a ready pen and every batch is tested. See the full [range](/catalog).

All products are sold for research purposes only and are not intended for use in humans or animals.