International Journal of
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Review Article Volume 19 Issue 4
Methylene blue and thyroid health: exploring the intersections of mitochondrial function, redox biology, and endocrine adaptation
Angela D Mazza
Received: June 15, 2026 | Published: July 9, 2026
Citation: Mazza AD, et al. Methylene blue and thyroid health: exploring the intersections of mitochondrial function, redox biology, and endocrine adaptation. Int J Complement Alt Med. 2026;19(4):160-172. DOI: 10.15406/ijcam.2026.19.00781
Abstract
Methylene blue (MB), a century-old compound historically used for methemoglobinemia and other medical applications, has re-emerged as a molecule of interest in mitochondrial medicine, neuroprotection, and longevity research. Beyond its established clinical uses, MB functions as a redox-active agent capable of modulating mitochondrial respiration, oxidative stress pathways, and cellular energetics. These mechanisms may hold particular relevance for endocrine and metabolic systems, especially the thyroid gland, which is highly dependent on mitochondrial activity and tightly linked to redox balance. Thyroid hormones regulate oxidative phosphorylation, thermogenesis, mitochondrial biogenesis, and metabolic flexibility, while thyroid hormone synthesis itself relies on tightly controlled reactive oxygen species signaling. Disruptions in mitochondrial function and redox homeostasis have increasingly been implicated in fatigue syndromes, chronic inflammatory states, neurocognitive dysfunction, and tissue-level hypothyroid symptoms, even in the setting of biochemically euthyroid laboratory profiles. Emerging evidence suggests that MB may influence several pathways relevant to thyroid physiology, including mitochondrial electron transport, nitric oxide signaling, neuroinflammation, and oxidative stress modulation. This review explores the mechanistic intersections between methylene blue, thyroid hormone signaling, mitochondrial biology, and redox regulation within the broader framework of precision endocrinology and longevity medicine. Potential implications for metabolic resilience, neuroendocrine function, inflammation, and ferroptosis-related pathways are discussed, alongside important safety considerations and current limitations in the clinical evidence base. While direct thyroid-specific clinical data remain limited, MB represents an intriguing candidate for future translational investigation at the intersection of mitochondrial and endocrine health.
Keywords: methylene blue, thyroid hormones, mitochondria redox signaling, oxidative stress, precision endocrinology, metabolic flexibility, ferroptosis
©2026 Mazza. This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and build upon your work non-commercially.