+Bioavailability measures the fraction of an administered [Drug](/wiki/drug) or other substance that reaches the systemic circulation unchanged. This crucial metric determines the body's true [Absorption](/wiki/absorption) of a compound, influencing its therapeutic potential.
+## See also
+- [Pharmacokinetics](/wiki/pharmacokinetics)
+- [Dose](/wiki/dose)
+- [Metabolism](/wiki/metabolism)
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