The thyroid hormone, especially thyroxine (T4) and triiodothyronine (T3) that has an essential role to play in maintaining metabolic balance, growth, and the developmental processes. These hormones also exert the central influence on energy expenditure through their effects on basal metabolic rate, thermogenesis, and mitochondrial performance. When levels of circulating thyroid hormone exceed the normal physiologic range, as in hyperthyroid states, there is an upregulated spillover of reactive oxygen species (ROS), a paradoxical metabolic effect [1]. The resulting oxidative imbalance has metabolic and inflammatory implications as a predisposing factor to tissue injury and nosologically acceleration of trajectories. ROS, as inherent components of aerobic energy transduction are produced mainly in the mitochondrial compartment [2]. Given a homeostatic environment, their production is acted upon by a unified antioxidant defense system, thus maintaining a steady state between oxidation and reduction fluxes. Nevertheless, T4 and T3 increased circulation triggers the hypermetabolic state of hyperthyroidism, which potentiates electron transport and oxidative phosphorylation in the mitochondrial membrane, thus forefront and collective increase in ROS. In addition to the endogenous reserve of the antioxidant enzymes, the excess has an effect at the cellular homeostasis; the level which has been balanced by physiological regulators is crossed [3]. The oxidative stress then takes the form of a hostile cellular milieu, characterized by lipid peroxidation, breakup of DNA strands, and oxidation of proteins, all of which constitute destructive triads that could spread dysfunction into cellular and tissue territories [4]. In addition to their abilities to cause direct oxidant damages, the reactive oxygen species (ROS) act as communication mediators, coordinating the induction of the redox-responsive transcription components including the AP-1 complex and NF-kB. At the transcriptional level, these transcriptional networks become involved in an inflammatory cascade that results in the overexpression of cytokines and chemokines [5]. Through this signaling axis, a mechanistic dependency is created between the excess of thyroid hormone, an oxidative ambience out of proportion, and the initiation of the antecedent of a chronically inflammatory process. Delineation of this nexus inherits epistemological importance, as it clarifies previously obscure molecular aspects of hyperthyroid pathogenesis as well as identifying priori therapeutic targets at the level of oxidant and inflammatory pathways [6].