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Opinion: As a cardiologist, I know the dietary guidelines are failing our hearts

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Opinion: As a cardiologist, I know the dietary guidelines are failing our hearts


Meals at a restaurant on the UC San Diego campus. (File photo by Chris Stone/Times of San Diego)

Heart disease — affecting almost half of American adults — is the leading cause of death in the United States, claiming 700,000 lives each year. 

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As a practicing cardiologist for more than 20 years, I’ve watched patients do everything “by the book.” They eat according to the Dietary Guidelines for Americans — the federal government’s blueprint for nutrition policy — and still see their weight climb, blood pressure rise, and heart health deteriorate. 

The problem isn’t their effort. It’s the guidance itself, which promotes high-carbohydrate, low-fat diets that can actually worsen metabolic health, which can in turn worsen heart disease. Many assume that by following the government’s recommendations they can improve their health — but, too often, the opposite is true.

With the next edition of the Dietary Guidelines scheduled for release this month, we have a critical opportunity to move beyond outdated orthodoxy and align federal nutrition policy with modern science and clinical experience. Done right, this update can turn back the tide of chronic illness and save lives.

Since 1980, the Departments of Agriculture and Health and Human Services have issued the Dietary Guidelines every five years. These recommendations shape not only personal choices but also the food in school cafeterias, military mess halls, hospitals and nursing homes. They inform SNAP and WIC benefits, nutrition education, and even the labels on grocery store shelves.

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From the start, however, the guidelines steered Americans in the wrong direction. They marked a sharp departure from prior eating patterns by encouraging Americans to cut back on natural dietary fats and rely more heavily on refined high-carbohydrate foods. Saturated fat — and cholesterol by extension — were unjustly stigmatized, while bread, pasta and cereal became staples of the American diet.

The recommendations were not made with a metabolically vulnerable population in mind. For people already struggling with insulin resistance, obesity or diabetes, a high-carbohydrate diet frequently only compounds the problem by driving up insulin, promoting visceral fat storage around vital organs, and fueling a cycle of weight gain and chronic disease.

Four decades later, the guidelines remain out of step with science and with the health needs of the majority of Americans. They impose arbitrary caps on saturated fat, despite evidence showing no consistent link to higher rates of heart disease or mortality. They recommend dietary protein well below optimal levels for most populations. And they direct Americans to get 45-65% of their calories from carbohydrates — sidelining low-carb or ketogenic diet options proven to support weight loss, stabilize blood sugar, and reduce the risk factors that drive heart disease. 

Americans are being pushed toward metabolically damaging eating patterns. 

Today, 93% of Americans live with metabolic dysfunction — meaning their bodies struggle to convert food into energy efficiently. This breakdown in basic metabolic processes fuels the country’s epidemic of chronic disease. More than 75% of Americans are now overweight or obese. Heart disease mortality rates have increased from the 2010s to the 2020s, even as cholesterol levels have steadily fallen. 

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Put plainly: Federal nutrition policy has fallen far short of making Americans healthier. I know this to be true not only from statistics but from my own patients’ journeys. Many of them ate exactly as federal guidance prescribed and still found themselves gaining weight and developing hypertension, diabetes and heart disease. For years, I resisted the idea that fault could lie with the guidelines. 

Like most physicians, I was trained to be wary of fat and to consider carbohydrates as the foundation of a healthy diet. I dismissed suggestions that a low-carb or ketogenic diet could improve cardiovascular outcomes.

But then I tried it myself — and my own weight, cardiovascular markers, and energy improved. When I cautiously introduced the approach to my patients, I saw transformations I couldn’t ignore: their insulin sensitivity, blood sugar levels and blood pressure began to improve. These changes struck at the true drivers of coronary heart disease — metabolic dysfunction, obesity and type 2 diabetes — all stronger predictors than cholesterol levels. 

Their lives changed without a scalpel or a prescription. And their experiences mirrored what the science was increasingly showing: that the old low-fat, high-starch model had it backwards. 

A review of randomized trials found that low-carbohydrate diets significantly improved weight, blood sugar and blood pressure — the very risk factors that drive heart disease. 

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Another analysis comparing different levels of carbohydrate restriction showed consistent benefits across degrees of reduction. And, in patients with type 2 diabetes, ketogenic approaches have dramatically lowered average blood sugar as measured by HbA1c — a long-term measure of glucose control — while delivering substantial weight loss, all changes known to reduce cardiovascular complications. 

Yet our national guidelines remain stuck in an outdated paradigm. 

The upcoming 2025-2030 Dietary Guidelines offers a chance to finally get it right — to align federal recommendations with the latest, most rigorous evidence. That means prioritizing whole foods, removing limits on saturated fats, optimizing protein intake, and including low-carbohydrate and ketogenic options for the metabolically vulnerable. 

The nation’s leading killer isn’t inevitable. If the Dietary Guidelines are updated to reflect modern science, millions of Americans could soon be on the path to reclaiming their heart health. 

Bret Scher, MD, is a board-certified cardiologist and lipidologist, and the founding medical director of the Coalition for Metabolic Health.

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SD Unified moves forward with layoffs of classified employees

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SD Unified moves forward with layoffs of classified employees


SAN DIEGO (KGTV) — Less than 3 weeks after the San Diego Unified School District finalized a new contract with teachers, the school board voted unanimously on Tuesday to move forward with layoff notices for other district employees.

The layoffs affect classified employees — workers who are employed by the district but are not teachers and are not certified. That includes bus drivers, custodians, special education and teacher aides, and cafeteria workers.

The district says it is eliminating 221 positions — 133 that are currently filled and 88 that are vacant — to save $19 million and help address a projected $47 million deficit for the next fiscal year.

Preliminary layoff notices will go out on March 15, with final notices by May 15.

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The district estimates about 200 classified employees will receive preliminary notices, but of them, about 70 are expected to lose their jobs based on union-negotiated bumping rules.

Bumping allows employees with more seniority to move into another position in the same classification, thereby “bumping” a less senior employee out of that role.

Lupe Murray, an early childhood special education parafacilitator with the district, said the news came as a shock after the teacher strike was called off.

“When the strike was called off, I’m like, ‘Yes!’ So then when I got the email from the Superintendent, I’m like, ‘Wait, what?’ So, I think everyone was shocked,” Murray said.

The district says it sends out annual layoff notices, as all districts in the state do.

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Before Tuesday’s board meeting, classified employees rallied outside, made up of CSEA (California School Employees Association) Chapters OTBS 788, Paraeducators 759, and OSS 724. They were joined by parents, students, and the San Diego & Imperial Counties Labor Council, AFL-CIO.

Miguel Arellano, a paraeducator independence facilitator with San Diego Unified and a representative of San Diego Paraeducators Cahpter 759.

“What do we want? No layoffs! When do we want it? Now!” the crowd chanted.

Arellano said he felt compelled to act when he learned about the potential layoffs.

“The first thing that went through my mind was that I need to speak up. I need to protect these people,” Arellano said.

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Inside the meeting, the board heard emotional, at times tearful testimony from classified employees before voting unanimously to move forward with the layoff schedule.

Superintendent Fabi Bagula said the district has tried to protect classrooms from the cuts.

“We have tried our best to only, I mean, to not touch the school. Or the classroom. But now it’s at the point where it’s getting a little bit harder,” Bagula said. “What I’m still hoping, or what I’m still working toward, because we’re still in negotiations, is that we’re able to actually come to a win-win, where there’s positions and availability and maybe even promotions for folks that are impacted.”

Arellano warned the layoffs could have a direct impact on students.

“We are already spread thin, so, with more of a case load, it’s going to be impossible to be able to service all the students that we need to have,” Arellano said.

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Follow ABC 10News Anchor Max Goldwasser on InstagramFacebook, and Twitter.

This story was reported on-air by a journalist and has been converted to this platform with the assistance of AI. Our editorial team verifies all reporting on all platforms for fairness and accuracy.





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Scripps Oceanography granted $15M for deep sea, glacier science

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Scripps Oceanography granted M for deep sea, glacier science


The Fund for Science and Technology, a new private foundation, granted Scripps Institution of Oceanography at UC San Diego $15 million for ocean science Tuesday.

FFST, funded by the estate of the late Microsoft co-founder Paul Allen, was started in 2025 with a commitment to invest at least $500 million over four years to “propel transformative science and technology for people and the planet.”

“Scripps Institution of Oceanography at UC San Diego is pushing boundaries for exploration and discovery across the global ocean,” Chancellor Pradeep Khosla said. “This visionary support from the Fund for Science and Technology will enable Scripps researchers to advance our understanding of our planet, which has meaningful implications for communities around the world.”

The grant, the largest of its kind since Scripps joined UCSD in 1960, will go toward research in three areas: monitoring of environmental DNA and other biomolecules in marine ecosystems, adding to the Argo network of ocean observing robots, and enhancing the study of ocean conditions beneath Antarctica’s Thwaites Glacier, often referred to as the “Doomsday Glacier.”

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Scripps Institution of Oceanography has used Argo floats for more than two decades to track climate impacts in our oceans. NBC 7 meteorologist Greg Bledsoe reports.

“The Fund for Science and Technology was created to support transformational science in the search of answers to some of the planet’s most complex questions,” said Dr. Lynda Stuart, president and CEO at the fund. “Scripps has a long tradition of leadership at the frontiers of ocean and climate science, and this work builds on that legacy — strengthening the tools and insights needed to understand our environment at a truly global and unprecedented scale.”

Scripps Director Emeritus Margaret Leinen will use a portion of the grant in her analysis of eDNA — free-floating fragments of DNA shed by organisms into the environment — in understudied parts of the ocean to collect crucial baseline data on marine organisms, according to a statement from Scripps.

“In many regions, we know very little about the microbial communities that form the base of the ocean food web or that make deep sea ecosystems so unique,” Leinen said. “Without data, we can’t predict how these communities are going to respond to climate change or what the consequences might be. That’s a vulnerability — and this funding will help us begin to address it.”

Using autonomous samplers that can collect ocean water for eDNA analysis, as well as conventional sampling, scientists will use tools to “reveal the biology of the open ocean and polar regions.”

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According to Scripps, the international Argo program has more than 4,000 floats that drift with currents and periodically dive to measure temperature, salinity and pressure. Standard floats can record data up to depths of 2,000 meters (6,560 feet), while newer Deep Argo floats can dive to 6,000 meters (19,685 feet).

The grant funding announced Tuesday will allow for Scripps to deploy around 50 Deep Argo floats along with Woods Hole Oceanographic Institution and NOAA’s Pacific Marine Environmental Laboratory.

Sarah Purkey, physical oceanographer at Scripps and Argo lead, said this leap forward in deep ocean monitoring comes at a crucial time because the deep sea has warmed faster than expected over the last two decades.

Thwaites Glacier is Antarctica’s largest collapsing glacier and contains enough ice to raise global sea level by roughly two feet if it were to collapse entirely. According to Scripps, prior expeditions led by scientist Jamin Greenbaum discovered anomalously warm water beneath the glacier’s ice shelf — contributing to melting from below. Greenbaum now seeks to collect water samples and other measurements from beneath Thwaites’ ice tongue to disentangle the drivers of its rapid melting.

This season’s Antarctic fieldwork will “test hypotheses about the drivers of Thwaites’ rapid melt with implications for sea-level rise projections,” the statement from Scripps said.

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“The ocean holds answers to some of the most pressing questions about our planet’s future, but only if we can observe it,” said Meenakshi Wadhwa, director of Scripps Institution of Oceanography and vice chancellor for marine sciences at UCSD. “This historic grant will help ocean scientists bring new tools and approaches to parts of the ocean we’ve barely begun to explore.”



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Southern California’s Jewish community reacts to war in the Middle East

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Southern California’s Jewish community reacts to war in the Middle East


The Jewish community in Southern California is sharing their fears and hopes following the weekend’s strikes on Iran and retaliatory attacks on Israel, U.S. military bases and other targets in the Middle East.

The exchange of missiles in the Middle East is having a devasting effect on Iran’s defense capability, but retaliatory strikes in the region are taking a toll. 

“Weapons of enormous capacity that are targeting civilian areas,” said Elan Carr, CEO of Los Angeles-based Israeli American Council.

Carr says toppling the Iranian regime, taking out its nuclear capabilities and freeing the Iranian people from this oppressive rule should have been done decades ago.

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“This is about seeing the most evil regime, the world chief state sponsored terrorism to no longer have the ability to do what it’s been doing,” Carr said.

Sara Brown, regional director of the American Jewish Committee, said the U.S. and Israel are concentrating strikes on Iran’s missile sites and military industrial complex. Iran’s retaliatory strikes are focused on many civilian targets.

“We are hearing from our partners from around the region, who are terrified,” Brown said. “Across the Middle East right now, I think there is a tremendous amount of fear, but also hope and also resolve.”

AJC is the advocacy arm for Jewish people globally. Many members and partner groups are in harm’s way. Brown says the risk is great, but the potential reward is world changing.

“That Iranian people will get to choose leadership for themselves, that we will finally see a pathway forward for peace across the Middle East,” Brown said.

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If wars of the past hadn’t produced lasting peace, then why now? Carr says Iran’s nuclear capabilities are destroyed and Iran’s military and proxies are weakened after Israel’s response to the Oct. 7 Hamas ambush.

“No more terrorist network throughout the Middle East. Think of what that could mean. Think of the normalization we could see,” Carr said.

President Donald Trump expects fighting to last several weeks. Some critics are concerned about a drawn-out conflict that could spread.

Carr is not convinced.

“Who is going to enter a war against the U.S. and Israel? Russia is plenty busy. China has no interest in jeopardizing itself this way,” Carr said.

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Besides the six Americans killed as of Monday night, government officials say 11 people were killed in retaliatory strikes in Israel.



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