The Body of
Work

Longevity Medicine

Professor Smith's current frontier: the evidence-based science of extending healthspan. Drawing on four decades of clinical medicine, his work examines the mechanisms of ageing — senescence, autophagy, stem cell activation — and what lifestyle, nutritional, and pharmacological interventions genuinely move the needle. The subject of his forthcoming book, 30 Minutes to Longevity.

Key Themes

• Cellular senescence
• Autophagy & cellular recycling
• Evidence-based longevity interventions
• Healthspan vs lifespan

TRPM3 Ion Channels & Long COVID

Professor Smith's team was among the first to identify TRPM3 ion channel dysfunction in patients with chronic fatigue syndrome (ME/CFS) and post-COVID-19 condition. Subsequent published work demonstrated that low-dose naltrexone can restore TRPM3 function in natural killer cells from long COVID patients — a finding with significant therapeutic implications for one of medicine's most difficult-to-treat conditions.

Key Themes

• TRPM3 ion channel dysfunction
• Long COVID & ME/CFS
• Low-dose naltrexone
• Natural killer cell function

Food Allergy & Anaphylaxis

One of Australia's leading clinical researchers in food allergy and anaphylaxis. Professor Smith's work has informed national clinical guidelines and shaped practice across the country — examining sensitisation mechanisms, threshold variability, and the management of life-threatening reactions.

Key Themes

• Anaphylaxis mechanisms
• Sensitisation pathways
• Clinical threshold variability
• National guideline development

Mucosal Genomics & the Gut-Immune Interface

The mucosal immune system sits at the intersection of the microbiome, systemic immunity, and chronic disease. Professor Smith's research explores mucosal genomics and how gut-immune interactions influence allergy predisposition, immune dysregulation, and emerging disease patterns — bridging molecular discovery and clinical application.

Key Themes

• Mucosal genomics
• Gut microbiome & immunity
• Allergy predisposition
• Systemic immune regulation

Genetic Pathways of Inflammation

At the molecular level, Professor Smith investigates the genetic and cellular mechanisms underpinning immune activation, dysregulation, and chronic inflammation. This work spans acetylcholine receptor polymorphisms, TRP channel genetics, and the broader molecular architecture that determines how and why immune systems fail.

Key Themes

• Inflammatory gene pathways
• Ion channel genetics
• Acetylcholine receptor SNPs
• Immune activation mechanisms