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The Molecular Foundation. Receptor specificity, pleiotropy, and the biological half-life of synthetic messengers.
Peptides are signaling molecules. If proteins are the "bricks" of the body, peptides are the "contractors" transmitting precise instructions to the cellular machinery.
Unlike drugs that might "flood" a system, peptides only bind to specific receptors.
Case Study: GLP-1
One peptide, multiple system targets.
Why synthetic peptides aren't "natural" amino acids.
Endogenous peptides are designed to disappear. Your body has enzymes (proteases) that tear amino acid chains apart in minutes. This ensures tight control.
By swapping an L-Amino Acid for a D-Amino Acid or adding a fatty acid tail (Acylation), we can hide the peptide from these enzymes.
Selection of RoA (Route of Administration) determines the bioavailability and crossing of barriers.
Slow absorption into peripheral fat. Ideal for 90% of structural repair.
Bypasses Blood-Brain Barrier (BBB) for direct CNS signaling.
Requires Arginate salts to survive gastric pH (e.g. BPC-157 PDA).