{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T17:36:56Z","timestamp":1786642616932,"version":"build-2736575974"},"reference-count":64,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T00:00:00Z","timestamp":1786579200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Post-exertional malaise (PEM) and cognitive dysfunction (hereafter \u201ccognitive dysfunction\u201d, including the patient-reported syndrome often described as \u201cbrain fog\u201d) are among the most disabling features of Long COVID; yet, approved disease-modifying treatments remain lacking. Emerging evidence implicates interacting disturbances in mitochondrial bioenergetics, redox regulation and neurovascular inflammation, although much of the supporting evidence remains indirect and derives from acute COVID-19, myalgic encephalomyelitis\/chronic fatigue syndrome (ME\/CFS), primary mitochondrial disease, inflammatory biology and mechanistic pharmacology rather than from direct Long COVID intervention trials. This hypothesis-generating narrative review develops a mechanism-based translational framework: that a pathway-targeted nutraceutical programme may modulate selected elements of these three axes, subject to prior demonstration of formulation quality, pharmacokinetic feasibility, target engagement and safety. Candidate modules comprise coenzyme Q10 and alpha-lipoic acid for bioenergetic\/redox support; selenium, sulforaphane and resveratrol for Nrf2\u2013thioredoxin-related redox regulation; and Boswellia serrata, luteolin and eicosapentaenoic acid for putative prostaglandin\/resolution-pathway modulation. Sonlicromanol provides a conceptual mechanistic precedent for combined redox and prostaglandin-directed pharmacology, but it is not considered pharmacologically equivalent to an eight-agent nutraceutical combination. We summarise the mechanistic rationale, distinguish direct from indirect evidence, define qualitative evidence-grading criteria, outline safety and interaction considerations, and propose a staged translational research programme. This framework is intended to generate falsifiable hypotheses for future Long COVID studies, not to imply established clinical efficacy.<\/jats:p>","DOI":"10.3390\/nu18162650","type":"journal-article","created":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T17:01:35Z","timestamp":1786640495000},"page":"2650","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Targeting Bioenergetic, Redox and Prostaglandin Pathways in Long COVID-Associated Post-Exertional Malaise and Brain Fog: A Nutraceutical Translational Hypothesis"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6714-9027","authenticated-orcid":false,"given":"Stephan F. E.","family":"Praet","sequence":"first","affiliation":[{"name":"University of Canberra Research Institute for Sport and Exercise (UCRISE), University of Canberra, Canberra ACT 2617, Australia"},{"name":"Ochre Health Medical Centre Bruce, University of Canberra, Canberra ACT 2617, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1038\/s41579-022-00846-2","article-title":"Long COVID: Major findings, mechanisms and recommendations","volume":"21","author":"Davis","year":"2023","journal-title":"Nat. Rev. Microbiol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"e102","DOI":"10.1016\/S1473-3099(21)00703-9","article-title":"WHO Clinical Case Definition Working Group on Post-COVID-19 Condition. 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