← Home
The Proof · April 28, 2026 · 58m

Food Labels, Fibre, and Ultra-Processed Foods: What Really Matters

Rhiannon Lambert
Show Notes

Registered nutritionist Rhiannon Lambert breaks down the science behind ultra-processed foods, food labeling accuracy, and practical strategies for home cooking. The episode cuts through marketing hype to explain what the evidence actually shows about UPFs and health, the limitations of current classification systems, and how to read nutrition labels without falling into purism.

This summary was generated from show notes and public descriptions, not from a full transcript review. Details may contain inaccuracies.

Curious

•
The Food Matrix Matters More Than Individual Nutrients
How nutrients are embedded in food structure — fiber content, particle size, food form — affects how the body absorbs and processes them, making identical nutrients in different matrices deliver different outcomes.
ClaudeChatGPTGemini

Highlights

•
Calorie Labels Are Systematically Inaccurate
Calorie counts on food packets are often 30-40% off from actual caloric content due to variation in food composition, processing methods, and individual digestive efficiency.
ClaudeChatGPTGemini
•
The NOVA System Is Useful But Blunt
While the NOVA classification (unprocessed, processed, ultra-processed) provides a useful framework, it's too broad to distinguish between genuinely harmful UPFs and those that are simply convenient or shelf-stable.
ClaudeChatGPTGemini
•
UPF Cancer Risk: The Evidence Is Correlational, Not Causal
Recent studies linking ultra-processed foods to cancer show correlation but don't establish causation, and the UCL home-cooking study suggests cooking method and overall diet quality may confound the relationship.
ClaudeChatGPTGemini

Editorial

•
Specific Additives Worth Questioning vs. Sensible Fortification
Not all additives are equal — some (like vitamin fortification) address real deficiencies, while others (like certain colorings linked to hyperactivity) warrant scrutiny, and many fall in between.
ClaudeChatGPTGemini

References

■
The Unprocessed Plate — Rhiannon Lambert — Lambert's guide to practical, non-purist approaches to food
■
The Fibre Formula — Rhiannon Lambert — Lambert's book on dietary fiber and nutrition

Misc

✧Calorie labels can be off by 30-40% — a significant accuracy problem rarely discussed in mainstream nutrition
✧The NOVA system for classifying ultra-processed foods is useful but blunt — not all UPFs carry equal risk
✧The conversation frames nutrition science as nuanced, not binary — neither all-or-nothing puritanism nor dismissal
Was this useful?