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Sigma Nutrition Radio

#558: Rethinking Ultra-Processed Foods in the Modern Food System – Duane Mellor, PhD

Sigma Nutrition Radio

Danny Lennon

Nutrition, Health & Fitness

4.8 • 633 Ratings

🗓️ 1 April 2025

⏱️ 52 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

Discussions around ultra-processed foods (UPFs) and their role in public health have gained significant traction in recent years. While some advocate for categorizing and regulating these foods due to their potential negative health effects, others argue that such classifications can oversimplify the issue and detract from more actionable dietary changes.

In this episode, Dr. Duane Mellor, a registered dietitian and researcher, joins us to explore the complexities of the UPF debate. Rather than dismissing the concept outright, Dr. Mellor emphasizes the importance of nuanced discussion, bridging the gap between research findings and practical, evidence-based dietary guidance.

Throughout this conversation, we unpack the broader implications of ultra-processed foods in the food system, consider how added fat, salt, and sugar contribute to public health challenges, and explore realistic approaches for dietary improvements.

Guest Information

Dr. Duane Mellor, PhD is a registered dietitian, academic researcher and science communicator. Dr. Mellor is currently working in clinical dietetics, working to support people, families and carers living with diabetes.

Previously Dr. Mellor worked in medical education at Aston University, holding the position of Associate Dean for Public Engagement in the College of Health and Life Sciences.

After initially working in the areas of clinical trials, Dr. Mellor's other research interests focused on improving nutrition and health by working with communities to celebrate their heritage through food and help tackle barriers resulting from societal inequalities.

Timestamps

  • [03:02] Interview start
  • [06:39] Understanding the NOVA classification
  • [09:53] Potential pitfalls and policy implications
  • [14:52] Food science and technology perspectives
  • [20:47] Challenges in food classification
  • [26:13] Health equity and policy considerations
  • [42:31] Communication and public perception
  • [50:30] Final thoughts and advice
  • [51:15] Key ideas segment (Premium-only)

Related Resources

Transcript

Click on a timestamp to play from that location

0:00.0

Hello and welcome to Sigma Nutrition Radio. My name is Danny Lennon and you are listening to

0:04.6

episode 558 of the podcast. You are very welcome. Today we're going to be talking all about the

0:11.5

concept of ultra-processed foods, the food system more broadly and potential implications for

0:18.5

regulation or public health decisions going forward and what to do with the

0:23.2

current research we have around diets that are high and ultra-processed foods, having these

0:28.0

clear associations with negative health outcomes. However, at a more specific level, there are

0:33.4

potential problems that many people have raised. And some of those have been discussed on

0:37.2

previous episodes of this podcast, where there's potentially a risk of putting foods that

0:42.6

maybe could have potentially positive health benefits, or at least neutral, in alongside

0:47.2

this grouping, and could also lead to some unintended consequences. And some of those were raised

0:53.5

in the previous episode we did with

0:55.5

Professor Christopher Gardner. But to go into more detail around this topic, today I'm going

1:00.0

be talking with Dr. Dwayne Miller, who is a registered dietitian and a researcher, and he has

1:05.2

done some writing on this particular topic that we're going to focus on today, specifically a paper that he wrote titled

1:12.3

the role of food science and technology in navigating the health issues of ultra-processed foods.

1:17.0

And off the backdrop of that, I wanted to talk to him about some of those ideas that he raised

1:22.1

and try and think about how that applies to where we go from here, both within nutrition science and also in terms

1:29.4

of making decisions in the real world around this particular classification.

1:35.6

Dr. Miller is a registered dietitian, he's an academic researcher, he is currently working

1:41.2

in the area of clinical dietetics, in the area of diabetes, but has also spent

1:45.4

a significant period of time in academia in the past as well, as well as doing some science

1:51.2

communication. And so we're going to try and work through these different ideas around

...

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