The Physiological Dosing Range defines the concentration of an exogenous substance, such as a hormone or nutrient, administered to replicate the levels naturally produced by a healthy, optimally functioning endogenous system. This clinical principle ensures that interventions restore hormonal balance without inducing supraphysiological effects or suppressing the body’s native production mechanisms. Doses within this range are designed to elicit the beneficial effects of the molecule while minimizing the risk of adverse side effects or disruption of the homeostatic setpoint.
Origin
This is a core concept in clinical endocrinology and pharmacology, stemming from the foundational understanding of hormone replacement therapy. It distinguishes therapeutic approaches that aim for restoration and balance from those that seek to achieve pharmacological, supra-normal levels. Adherence to the physiological range is a marker of clinical conservatism and safety in hormonal health.
Mechanism
The mechanism relies on the dose-response relationship of a molecule with its target receptors. Within the physiological range, the administered substance occupies receptors to restore the normal complement of signaling, thereby correcting a deficiency and reactivating downstream pathways. Dosing above this range risks receptor saturation and desensitization, or the activation of secondary, non-target receptors, leading to unintended and potentially harmful side effects. Precision testing and iterative adjustments are essential to remain within this optimal window.
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