The Proof with Simon Hill · Live better for longer

The good and the bad of the new US dietary guidelines | Dr David Katz

February 16, 2026·1 hr 31 min·7 clips

The new US dietary guidelines now place meat and full-fat dairy at the top, ignoring expert scientists and omitting any mention of sustainability.

The opening question is blunt. Why did guidelines meant to reflect the best nutrition science seem to push parts of the expert review aside? Katz answers by widening the frame. Diet quality, he says, is not a zero-sum choice between cutting processed foods and adding more meat or dairy fat. The practical advice stays plain: eat food, mostly plants, with vegetables, fruits, whole grains, beans, lentils, nuts, and seeds doing most of the work. Simon presses the historical comparison. If Americans drift back toward a mid-century pattern heavy in meat and dairy, does that echo a period when heart disease was common? Katz rejects the tradeoff. Less sugar does not mean more saturated fat, and less beef does not mean more refined carbohydrate. Both can hurt health. He calls fat-reduced dairy with added sugar a sideways move, not a real health gain. The guideline fight is not just wording. School lunches, doctor advice, and food policy can all take cues from national recommendations. Sustainability is missing too. The transcript says climate, planet, and sustainable language does not appear in the document. The show stays measured. Did the science change? Did the final recommendations follow it? Katz ends up in a practical place: culture, upbringing, spices, and preparation matter, but the basics of healthy eating are still broadly shared. A better diet can cut processed foods while moving toward mostly plant-based staples, instead of reviving a pattern built around red meat and full-fat dairy.

As heard by us

A clear look at how nutrition evidence gets shaped before it reaches the public.

The episode treats the new US dietary guidelines as a real tug of war between evidence, politics, and the final wording that survives the edit. Simon Hill and Dr.

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You want the real story behind the 2025 US dietary guidelines.

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