Duncan Smart

Duncan Smart is an author, international endurance athlete, former mathematics teacher, and independent researcher whose work explores the meeting point between physical health, human potential, spirituality, and the deeper questions of consciousness and meaning.

Now the author of twelve books, Duncan writes across two closely connected fields. His health and nutrition titles include Ancestral Health, Carnivore: The Manual, Blood & Bone, and Metabolic Sovereignty, drawing on more than nine years of living a carnivore lifestyle alongside decades of endurance sport, self-experimentation, and research into human metabolism.

His spiritual and philosophical writing takes that exploration inward. Books such as The Voice of Mary Magdalene, The Subconscious Christ, and The Seventh Breath examine spiritual transformation, consciousness, identity, inner awakening, and the ways in which inherited beliefs shape the human experience.

Duncan’s approach is grounded in evidence-informed research, disciplined observation, and real-world experience. His journey through endurance performance and metabolic health led him increasingly back to fundamentals: real food, fasting, recovery, movement, light, rhythm, simplicity, and personal responsibility.

He holds a BA (Hons) and a PGCE in Mathematics, and his background in teaching continues to shape the way he writes: complex ideas made clear, unnecessary noise stripped away, and theory brought back to practical understanding. He has appeared in television interviews and as a guest on health, nutrition, and performance podcasts.

Based in North Yorkshire, England, Duncan continues to write across both the physical and the metaphysical (the body and the inner life) united by a recurring fascination with what remains when convention, complexity, and inherited assumptions are stripped away.