Cmax
Also known as: peak concentration · maximum plasma concentration
The maximum plasma concentration reached after a single dose of a peptide.
Cmax is the peak of the concentration-time curve. It matters for two reasons: first, it correlates with acute side-effect intensity (nausea from GLP-1 peptides tracks Cmax far more tightly than AUC), and second, it defines the receptor occupancy ceiling achievable per dose. Cmax is determined jointly by dose size, injection depth, and absorption rate — which is why splitting a weekly dose into two half-doses produces a lower Cmax and typically a milder side-effect profile at equivalent weekly AUC.
Researchers running titration protocols often target Cmax below a compound-specific tolerance threshold rather than chasing a fixed milligram number. DoseCraft surfaces compound-level Cmax estimates so protocol builders can see where the peak lands before injecting.
Related Terms
Cmin
The lowest plasma concentration of a peptide during a dosing interval, typically measured immediately before the next dose.
AUC (Area Under Curve)
The integrated total exposure of the body to a peptide over time, calculated as the area under the concentration-time curve.
Half-Life
The time required for the concentration of a peptide in the body to fall to half of its peak value.
Titration
The gradual adjustment of a peptide dose — typically starting low and stepping up — to minimize side effects while establishing effective exposure.
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