Amino acids: the individual building blocks
Amino acids are compounds the body combines to make proteins. They also have other roles in biology. Different combinations and arrangements contribute to different protein structures.
Peptides: shorter chains
A peptide is a short chain of amino acids linked together. Proteins generally refer to longer chains that form more complex structures, though terminology and length boundaries can vary by scientific context.
Proteins: structure and function
Proteins do many jobs in cells, including structural work, transport, and chemical reactions. A protein's sequence and three-dimensional shape help determine its function.
Biology is not a product recommendation
Knowing what a peptide is does not tell you whether a particular product is safe, effective, or appropriate for a person. This site does not offer peptide products, dosing information, injections, or treatment protocols.
Bring the focus back to the basics
For everyday activity, this field guide focuses on a manageable workout routine, comfortable movement breaks, and recovery habits. The biology terminology is background learning, not an intervention.