How I Work The truth about fibre, full-body MRIs and food myths, with Dr Joanna McMillan.
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Feb 18, 2026 Dr Joanna McMillan, nutrition scientist, dietitian and author of The Fibre Factor, cuts through food panic with evidence-based clarity. She debunks nutrition myths and anti-plant hype. She explains coronary calcium scores, questions full-body MRIs, and champions diverse fibre and gradual increases. She also stresses practical supplements and the underrated importance of joy at mealtimes.
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Prioritize Simple Preventive Checks
- Get basic annual checks: full blood count, blood pressure, waist circumference and the screening tests recommended at your age.
- Prioritize free, proven screenings like bowel tests and mammograms, and do earlier checks if family history suggests risk.
When A Calcium Score Helps
- Consider a coronary calcium score if your lipid results are unclear or personalised risk needs clarification.
- The scan is quick and can reassure you if your calcium score is zero, reducing unnecessary worry about LDL alone.
Screening Trade‑Offs And Opportunity Cost
- Full body MRIs often produce findings that increase anxiety and cost a lot without clear population-level benefit.
- Spending on lifestyle (food, activity) often yields more proven health gains than lavish screening for the "worried well."
