Knowledge base

Background for researchers

Practical articles on assessing research peptides and their documentation — written for researchers and laboratory staff, not as product promotion.

Retatrutide vs semaglutide vs tirzepatide

The factual difference: how many receptors each peptide targets and their EU regulatory status. No efficacy or dosing claims.

BPC-157 vs TB-500: what is the difference?

Two frequently confused recovery peptides with different origins and different mechanisms of action — why the literature treats them as complementary rather than interchangeable.

BPC-157 vs KPV: what is the difference?

Fifteen amino acids against three. Origin, structure and research focus of two peptides that keep landing in the same category.

GHK-Cu vs AHK-Cu: what is the difference?

Two copper peptides identical but for one amino acid. Composition, copper binding and where the research lines diverge.

Tesamorelin vs CJC-1295: what is the difference?

Two analogues of the same hormone built on opposite design strategies. And why a blend with ipamorelin adds a different mechanism.

Reconstituting and storing peptides: fridge or freezer?

How to dissolve a lyophilised peptide without foaming, and how to store it afterwards — what temperature, fridge or freezer, and for how long.

How do you read a CoA (Certificate of Analysis)?

What an HPLC purity percentage does and does not tell you, why mass spectrometry matters for identity confirmation, and which red flags to watch for in supplier documentation.