The Campbell Letter

The Campbell Letter

The Farm as a Classroom for Truth

How My Father's Early Life in Nature Shaped the Science Destined to Change Everything

Nelson Campbell
Oct 08, 2025
∙ Paid

I think most of you reading this letter know of my father, Dr. T. Colin Campbell, who performed the pioneering research that validated the health benefits of a plant-based diet. He published more than 300 peer-reviewed papers and submitted 13 lengthy project proposals to the National Institutes of Health, all of which were funded – a rare accomplishment given that only about 15% of proposals were accepted during that period.

My father also envisioned and led the famed China research study, which used a unique study design to identify larger patterns reflective of diet and disease relationships. This study confirmed what my father had seen in the lab, and its findings in support of a plant-based diet have been celebrated around the world. Unfortunately, while we celebrate those findings, we have failed to fully understand one of the most important ideas underlying his research.

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© 2025 Nelson Campbell
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