The precise clinical administration of an exogenous substance, such as a hormone or peptide, at a dosage and frequency that closely replicates the natural concentration and rhythm of the compound as it would be produced endogenously by a healthy, youthful body. This approach aims to restore physiological function without inducing supraphysiological peaks or pharmacological side effects. It is the gold standard for hormonal replacement and optimization, ensuring naturalistic signaling.
Origin
The term combines “Physiological Dose,” referring to a quantity that matches natural biological levels, with “Delivery,” the method of administration. This concept is a core tenet of bio-identical hormone replacement therapy and precision endocrinology, contrasting sharply with traditional, often higher, pharmacological dosing.
Mechanism
Effective delivery relies on selecting an administration route, such as transdermal or subcutaneous, that avoids the first-pass metabolism associated with oral intake, which can lead to unnatural metabolite profiles. The dosage is meticulously calculated based on lean body mass, baseline lab values, and desired trough and peak levels to ensure a steady, rhythmic concentration within the hormonal stability window. This meticulous approach maintains the integrity of the body’s receptor-mediated signaling pathways.
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