Dr. Cate

This author has written 254 articles
Guidelines & Research
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January 6, 2026

2025 Dietary Guidelines Group Seed Oils With Ultra-Processed Food. That Alone Is a Breakthrough

This Year’s U.S. Dietary Guidelines call out industrially refined seed oils as problematic. The US Dietary Guidelines will be released in just a few days. They are expected to make a historic change regarding refined seed oils. Departing from decades of guidance that treats these oils as an unqualified nutritional upgrade, they’re calling out the fact that most seed oils are ultraprocessed, and their health effects merit closer examination. (You may have been led to believe that seed oils’ health effects have been thoroughly examined. They have not. And I’m writing another article that exposes why the nutritionists who claim…

A Collection Of Eight Bottles Of Unhealthy Toxic Seed Oil
PUFAs
·
October 26, 2025

Seed Oil FAQs

All the answers to your health questions about how seed oils are harmful to your health. And which vegetable oils and fats are good and which are bad.

Is Cold-Pressed Sunflower Oil Really Healthy?
Seed Oils
·
September 4, 2025

Is Cold-Pressed Sunflower Oil Really Healthy?

Cold-Pressed Sunflower Oil: Healthy or Hateful Eight? I get more questions about cold-pressed sunflower oil than I do about any other type of seed oil. It’s a good question—and I’ve not seen any article on the subject answer it correctly. So it’s high time I give you the answers you deserve. Here’s the TLDR: Cold-pressed sunflower oil can be ok—if it’s NOT refined. But it’s not okay for cooking. Worse, the label may not tell you about refining. While being cold-pressed is a good sign, it’s not the only factor to consider. The other factor to consider is refining; in…

Olive Oil Poured Onto A Vegetable Appetizer
Olive Oil
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June 13, 2025

How Scientists and Dishonest Media Bury The Evidence of Seed Oil Harms

New study examines how different fats affect fat cells. Reporters and scientists hide the data on seed oil harms. I’m often asked, “If seed oils are so harmful, why aren’t there more studies?” The truth is, there are more studies. The problem isn’t a lack of evidence. It’s how that evidence gets distorted. Study authors, universities, and media outlets seem to work together to downplay the risks, putting a spin on the results that makes seed oils look harmless, or even healthy. This article is a perfect example of how that happens. A new study is making headlines for suggesting…

Paiseec Power Wheelchair Tackles Florida Pebble Driveway
Bone Health
·
May 29, 2025

My new electric friend: Paiseec Foldable Power Wheelchair

What a bummer. The day after Christmas, I took a fall and hurt my knee. At the time, I didn’t think much of it—just a bad bruise, maybe a strain. I kept walking on it, waiting for it to get better. But it didn’t. After a couple of months with no improvement, I finally got X-rays. That’s when I found out I’d been walking on a fairly serious crush fracture. Looking back, I probably made it worse by not resting it properly from the start. Once I came to terms with the fact that I needed to stay off my…

Skeptical Doctor Pointing To Busted Myth
PUFAs
·
May 13, 2025

Omega-6 Linoleic Acid Is Not What Makes Seed Oils Bad

Introduction: Clearing Up Confusion About Omega-6 Linoleic Acid in Seed Oils Seed oil causes inflammation, but not for the reasons most people talk about. This matters because we need to identify the real health enemy. If we don’t get that right, everything else falls apart. You might have heard that seed oils, like soybean or corn oil, are inflammatory because of a fat called omega-6. You may also have heard that seed oils’ omega-6 causes health problems like diabetes or heart trouble. That’s a myth we need to bust! Omega-6 isn’t the real villain. The real problem is Oxidation The…

Cigarettes In A McDonald's French Fry Carton
PUFAs
·
May 10, 2025

Toxic Seed Oils Turn French Fries Toxic, Sadly

French fries are a beloved indulgence, but the toxic seed oils used to fry them can transform this treat into a health hazard. You may have seen this photo of cigarettes in a French fry cup before. It’s an AI-generated image. But it’s not just a made-up meme. It started circulating shortly after I was interviewed for this movie. During the interview, I made the rather shocking comparison between cigarettes and French fries. That comes from a study called: Toxic Lipid Oxidation Product (LOP) Generation in Culinary Frying Oils (CFOs) During High-Temperature Frying Practices: Passage into Fried Foods. In it,…

GRAPHIC ILLUSTRATING HOW SEED OILS PROMOTE OXIDATIVE STRESS AND FREE RADICALS
Seed Oils
·
May 10, 2025

Why are seed oils unhealthy?

Why Seed Oils Are the Biggest Threat to Your Health Seed oils,  also known as vegetable oils, or more precisely as The Hateful Eight, are not benign. To best understand why seed oils are harmful, we need to understand a biological process called oxidative stress. Oxidative stress: the great disease promoter. Understanding oxidative stress is crucial if you’re interested in health or nutrition science. I have spent over two decades researching various diets and their ability to prevent or promote oxidative stress. Oxidative stress is the root cellular process driving all known diseases. It occurs when free radicals—unstable molecules—overwhelm the…

Dr Cate Incredulous In Front Of An Image Of An Abstract From JAMA With Headline
Data Deception
·
April 15, 2025

Did Leading Nutrition Experts Knowingly Use Fatally Skewed Data?

JAMA Internal Medicine published the first-ever study comparing butter to seed oils. But they skewed the data to the point of absurdity. Time and again, I’ve seen supposedly peer-reviewed studies making conclusions that defy common sense. Especially seed oil studies. This latest journal is one of the worst examples I’ve come across. I’m going to break down what they did and how they got away with it in this article. Their paper is especially important. It’s the first, to my knowledge, to compare seed oils head to head with butter. More than 70 years have passed since health authorities started…

Hangry Man Holding Knife And Fork Over An Empty Plate
Insulin Resistance
·
February 4, 2025

Why do we get hangry?

Hangry is not normal hunger. Normal hunger is usually brought about by smelling food. It’s also common to feel normal hunger around our normal mealtimes because our digestive system has its own internal clock that keeps excellent track of time. (This is why your dog or cat always seems to know when it’s dinner o’clock.) Ordinary hunger does not make us angry or irritable. And unless we’ve gone for days without eating, normal hunger is a light stomach-grumbling sensation that goes away when we ignore it. Hypoglycemia makes us hangry. Hangry on on the other hand is hard to ignore.…

Row Of Supplements For Sale
Nutrition
·
December 12, 2024

Why My Magnesium Supplement of Choice is Magnesium Oxide

TLDR: I use and recommend Magnesium Oxide because it is more compact and easier to swallow. Also, being physically smaller, we only need to swallow a single pill. Studies claiming it doesn’t get absorbed are suspect. My approach to supplementation is minimal. I do recommend magnesium as well as a few other minerals and vitamins. (To learn which ones and why click HERE.) One of the most common questions I get is Why do you recommend magnesium oxide and not one of the other more bioavailable magnesium formulations? This question reflects the common belief that some magnesium formulations don’t get…

Shelf Of Heart Healthy Mazola With The Words Is This Worse Than Sugar
Keto Diet
·
October 13, 2024

Attention Keto Dieters: Seed Oil is Worse than Sugar

Fellow members of the keto community, keto dieters everywhere, we need to talk. I want to convince you that any amount of seed oils is way worse than small amounts of sugar. Ketones are not the miracle cure for all that ails us. A healthy metabolism is. The only reason we can’t see this is because we’ve been lied to about fats.  Seed oils destroy our metabolism. Sugar doesn’t. AFTER seed oils make us sick and insulin resistant THEN sugar can potentially become toxic to us. But because of HOW seed oils harm our body fat and mitochondria, cutting carbs…

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