#555: What Should the Dietary Guidelines Say? – Prof. Christopher Gardner

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Every five years, the U.S. Dietary Guidelines are updated based on the latest scientific evidence to help shape national nutrition recommendations. A panel of experts was assembled to review the existing research, evaluate new findings, and provide recommendations that will inform the next edition of the guidelines.

One of the committee members involved in this process is Professor Christopher Gardner, a leading nutrition scientist at Stanford University, who joins us to share key insights from the committee’s work.

In this discussion, Professor Gardner provides an inside look into how the committee evaluated dietary patterns, the role of plant-based proteins, and the ongoing debate surrounding ultra-processed foods. He explains the rigorous process of reviewing scientific literature, the challenges in translating research into policy, and the critical role of health equity in shaping the recommendations.

By exploring these themes, this episode aims to provide clarity on the scientific foundation behind the upcoming dietary guidelines. Whether you’re a nutrition professional, researcher, or someone interested in how dietary recommendations are formed, this conversation sheds light on the key discussions shaping the future of nutrition policy.

Timestamps

[03:38] Interview begins
[07:18] The rigorous process behind formulating dietary guidelines
[12:10] Key questions addressed and major findings from the report
[25:41] Identifying nutrients of concern and refining dietary patterns
[33:39] The importance of health equity in dietary recommendations
[36:04] Reassessing dairy’s role in different population groups
[41:05] Shifting the focus towards plant-based protein sources
[47:52] The debate on ultra-processed foods and public health implications
[58:24] Key Ideas segment (Premium-only)

Related Resources

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Scientific Report of the 2025 Dietary Guidelines Advisory Committee
Previous episode with Prof. Gardner: Episode 223

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