The New Dietary Guidelines Quietly Admit They Were Wrong (Here’s the Proof)

Berg identifies insulin resistance as the root cause of most chronic diseases, including obesity, type 2 diabetes, and fatty liver. He argues that the previous high-carb, frequent-eating dietary model directly caused an epidemic of insulin resistance. While he applauds the new guidelines for targeting ultraprocessed foods and raising protein, he insists they fail to address the people already metabolically damaged. He explains that if someone simply swaps junk food for real food but continues eating three meals and two snacks, insulin is still repeatedly spiked, making reversal nearly impossible. The only effective strategy is low carb combined with not eating so frequently — essentially intermittent fasting. He thinks the guideline committee omitted this because acknowledging insulin resistance would force them to admit their past errors, much like when they silently dropped cholesterol limits in 2015 without apology. Berg's emphasis on both diet composition and meal timing reflects a clinical reality: insulin health is a product of total insulin load over time, not just calorie type. He also notes that even hidden industrial starches like maltodextrin, often labeled as carb and sugar-free, can spike blood sugar more than sugar, further complicating insulin management without clear definitions.

Eric Berg, who has monitored these guidelines for decades, was shocked by the magnitude of the change. Instead of quietly adjusting numbers, the advisory committee openly criticized the old paradigm and put ultraprocessed foods in the crosshairs. He attributes this partly to data accumulation and partly to pressure from figures like RFK Jr. The shift is expected to rewire institutional food supply chains — schools, hospitals, nursing homes, military — that have been designed around ultraprocessed, grain-based meals. However, Berg notes the enormous implementation challenge: over 50% of Americans' calories come from ultraprocessed foods, and the entire supply chain is built for them. He also worries about the lack of a clear definition of ultraprocessed food and urges starting with a biological definition of ‘food’ to exclude items that cannot sustain health. The new guidelines also ditch the simplistic 'calories in, calories out' model, marking a move toward food quality over quantity.

Berg emphasizes that many people are deficient in high-quality protein, and this single change will have a cascading benefit on biochemistry. He points out that the old low-protein, grain-heavy advice contributed to insulin resistance and metabolic dysfunction. The new guidelines specify that protein should come from animal sources, which are more bioavailable and complete. This marks a departure from the past's plant-biased stance and aligns with growing evidence that higher protein intake supports satiety, muscle maintenance, and metabolic health. Berg predicts this shift will be 'huge' for public health once implemented in institutional meals and dietary advice. However, he cautions that protein alone can't fix insulin resistance if meal frequency isn't addressed; the omission of fasting and eating patterns leaves a gap.

Berg interprets this as a direct result of building scientific consensus that could no longer be ignored. He mentions that obesity, type 2 diabetes, and fatty liver are explicitly tied to ultraprocessed consumption. The political and economic implications are vast because the entire food supply chain is optimized for ultraprocessed items — from industrial starches to seed oils. Berg fears that without a standardized definition of ‘ultraprocessed,’ enforcement will be fuzzy. He proposes first defining real food biologically: that which sustains life and promotes growth and repair. Then anything outside that definition would be excluded. This, he claims, would force transparency and could revolutionize consumer awareness, making it clear that many products currently sold as food are not. The change in the guidelines, while monumental, still lacks the foundational definitional framework needed for full legal impact.

Berg argues that even the healthiest foods, if eaten frequently (three meals plus snacks, grazing), keep insulin elevated, perpetuating insulin resistance. He states that reversing insulin resistance requires two simultaneous interventions: a low-carbohydrate diet and reduced eating frequency — essentially intermittent fasting. The new guidelines' focus on food quality may help prevent insulin resistance in healthy people, but they will not reverse it in those already afflicted. He speculates that the guideline authors couldn't bring themselves to mention insulin resistance because doing so would force an admission that their previous advice caused it, just as they quietly removed cholesterol limits in 2015 without apology. Without addressing insulin resistance, the guidelines leave a massive gap. Berg insists that even real foods, if consumed all day, will still cause insulin issues, making meal timing as important as meal composition. He also ties in the failure to address industrial starches—hidden starches that spike blood sugar more than sugar—as a related oversight.

Berg explains that whoever controls the definition controls the outcome, a tactic he has seen used with the terms ‘drug’ and ‘disease.’ The legal definition allows items that cannot repair tissue or sustain life to be sold as food, perpetuating chronic disease. He proposes that the guidelines should first return to the biological definition: that which is eaten to sustain life, promote growth, and repair tissues — essentially nourishment. Then, anything not meeting that standard would not be called food. This step, he believes, would be a game-changer because consumers would instantly understand that many products on shelves are not actually food. He suggests that the new guidelines, while admirably targeting ultraprocessed foods, didn't tackle this foundational problem, which could limit their effectiveness. The lack of a clear, health-based definition might allow the food industry to continue using ambiguous terminology like ‘refined carbohydrates’ while hiding industrial starches like maltodextrin, which spike blood sugar more than sugar but are labeled as carb and sugar-free.

Berg points out that restricting saturated fat leaves unsaturated fats, primarily seed oils, as the default alternative. Although the guidelines mention refined oils as part of ultraprocessed foods, they don't adequately address oxidation of these oils during storage and heating. By keeping the cap, the guidelines contradict their own message about whole foods, because many whole foods like red meat and dairy naturally contain saturated fat. He sees this as a lingering effect of the anti-fat era and worries it might undermine the push for real food. The guidance also fails to distinguish industrial seed oils from natural, minimally processed fats. This remnant could cause institutions to continue promoting vegetable oils over butter or tallow, perpetuating omega-6 overload and oxidative stress. Berg feels that a truly evidence-based update would remove arbitrary saturated fat limits and focus instead on the degree of processing and oxidative stability of fats.