Red meat, eggs and seed oils weighed against the evidence

Labelled opinion, argued from published evidence. General education only, not medical advice. Your doctor or a registered dietitian knows your bloodwork; the internet doesn't.

Buy the eggs. Cook the ground beef. Put the canola in the back of the pantry and use butter and olive oil because they taste better. That's the short version, and if you close the tab now you'll be ahead of most people arguing about this online.

The longer version is worth your time, because the arguments aren't equally strong and it's useful to know which one to actually change your Tuesday over.

Learn to read the headline before you read the study

Nearly every scary food story comes from observational research. Researchers ask thousands of people what they ate, wait a decade or two, count who got sick. It's the only practical way to study diet at that scale, and it has a problem that never goes away: the people who ate less red meat in a 1990s cohort also smoked less, drank less, exercised more and had more money. Statisticians adjust for that. They can't adjust it out completely.

Then there's the questionnaire itself. You're being asked how many servings of beef you ate per week, on average, over the past year. Try answering that right now about last year. That's the raw material.

And watch the size of the number. A relative increase in risk sounds enormous until you see the base it's sitting on. Two in a thousand becoming two and a half in a thousand is a 25 percent increase and a headline, and also almost nothing you'd reorganize your family's meals around.

None of this means the research is worthless. It means the evidence for a food claim runs from strong to decorative, and you should know which end you're standing on.

Red meat: the processed/unprocessed line is the whole game

In 2015 the International Agency for Research on Cancer put processed meat in Group 1 and red meat in Group 2A. People ran with "bacon is as bad as smoking," which isn't what those categories mean. Group 1 means the agency is confident the hazard is real. It says nothing about how big it's. Tobacco and salami can share a shelf without sharing a magnitude.

The colorectal cancer signal for processed meat is consistent across a lot of populations, which is about as good as observational work gets. The signal for unprocessed red meat is weaker, less consistent, and sits right in the middle of the confounding problem described above. When you compare heavy steak eaters to light ones in a big cohort, you're also comparing two fairly different lives.

So separate them on your own plate. A chuck roast, a pound of 85/15, lamb chops, a Sunday brisket: these are protein and iron and zinc, and they keep you full through the afternoon in a way a bagel never will. Deli meat, hot dogs, bacon, the pepperoni on everything: treat those as flavor, not as the base of the meal. Bacon on the eggs is fine. Bacon as the eggs, five days a week, is a choice you're making on thin evidence in the other direction.

One more free improvement: stop charring meat to black. High-heat crust and flare-ups produce compounds nobody's excited about. Sear it, don't cremate it. A cast iron skillet at proper heat gives you a brown crust in ninety seconds a side and you're done.

Eggs: the case against them quietly collapsed

The 300 mg a day cholesterol cap came out of the Dietary Guidelines for Americans in the 2015-2020 edition. The advisory report's language was blunt: cholesterol isn't a nutrient of concern for overconsumption. That's the official guidance, not a fringe position.

What happened is that dietary cholesterol turned out to move blood cholesterol much less than the old model predicted for most people. There's a minority who respond strongly. If you've got familial hypercholesterolemia, or diabetes, or a lipid panel your doctor already frowns at, that's a real conversation to have with the person who can order a blood test. For everyone else, three eggs is a fast 18 grams of protein with the yolks intact, and the yolks are where most of the nutrition lives.

The honest historical footnote: in the old studies, eggs came with hash browns fried in whatever the diner had, white toast, and a cigarette. Attributing all of that to the egg was always a stretch.

Cook them in butter. Salt them. Eat them standing up if that's the morning you've got.

Seed oils: steelman it, then weigh it

The argument goes like this. Soybean, corn, sunflower, cottonseed and canola oils are extracted industrially, usually with hexane. They're loaded with linoleic acid, an omega-6 fat that barely existed in the food supply before the twentieth century and now shows up in everything. Heated repeatedly, as in a restaurant fryer running all day, they generate oxidation products you'd rather not eat. And American consumption of soybean oil climbed steeply over the same decades that obesity and metabolic disease did.

That's a real argument. Some of it is straightforwardly true. Consumption did explode. Reused fryer oil is genuinely degraded.

Now the other side. Replacing saturated fat with polyunsaturated vegetable oil lowers LDL cholesterol. That's about as replicated as anything in nutrition. But when researchers recovered the unpublished data from two old randomized trials, the Sydney Diet Heart Study and the Minnesota Coronary Experiment, and published the reanalyses in the BMJ, the groups that swapped in linoleic acid didn't live longer. Their cholesterol dropped and their mortality didn't improve. Those trials are old, imperfect, and hotly argued over. They're also the closest thing to a controlled test anyone has.

Where that leaves you: seed oils are probably not poison, and they're definitely not a health food, and the correlation with everything going wrong has a far more obvious explanation sitting right next to it. Almost nobody consumes soybean oil off a spoon. They consume it inside fries, chips, cookies, crackers, dressings and drive-thru chicken. The oil is riding along inside ultra-processed food eaten at nine at night in front of a screen. Blaming the oil for that's like blaming the tires for the crash.

Concede this honestly: the bottle of canola in your cabinet isn't why you're up twenty pounds since 2019.

Cook at home in butter, olive oil, tallow or avocado oil anyway. Not because the alternative is toxic, but because it tastes better, you control how hot it gets, and food you cook yourself isn't engineered to make you eat a second serving.

What this looks like on a Tuesday

Three eggs and yesterday's potatoes before the kids are up. A pound of 85/15 browned in cast iron with a jar of marinara and whatever pasta is in the cupboard, on the table in eighteen minutes. A chuck roast in a Dutch oven at 300°F for three and a half hours on Sunday, which is Monday's dinner and Tuesday's lunch and about nine dollars a pound of work you didn't have to do twice.

Protein at every meal, in a portion you can see. Vegetables because they're good and they fill the plate. Fruit instead of the bag of something at ten p.m.

If you're lifting three days a week around a job and a family, your nutrition problem is almost certainly not the oil in the pan. It's that dinner didn't get planned, so dinner became whatever was fastest, and you slept six hours on top of it. Fix the ordering. Protein, sleep, showing up. Then argue about linoleic acid.

And if you're making a big change, get a lipid panel first and another one about three months in. Numbers beat convictions, including mine.

Arguing about seed oils is a hobby. Cooking dinner is a habit. Only one of them ever shows up on a blood test.