Your Yakiniku Might Be Aging Your Brain

That fancy A5 wagyu you splurged on? A Japanese doctor says it might be accelerating brain aging.

Okay, so we all move here partly for the food, right? It's supposed to be one of the healthiest cuisines in the world.

Then you read something that makes you question everything. A new book by Dr. Kenju Shimomura, a specialist in 'sugar and the brain,' is basically calling out some of Japan's most beloved foods for being secretly terrible for us. And yeah, it's the good stuff.

The Snack Attack

You know when you're at the konbini or an izakaya and you grab a little bag of mixed nuts or some of that string cheese to be 'healthy'? Turns out, that might be a trap.

Dr. Shimomura says that while a tiny amount is fine, it's way too easy to overdo the fat with nuts and cheese. The excess gets stored as visceral fat, which causes inflammation and can lead to things like fatty liver and insulin resistance. He links this directly to an increased risk for Alzheimer's.

His advice? Enjoy nuts and cheese as a treat to 'enrich your life' maybe once a month. Once. A. Month. 🫠

Your Yakiniku Is Trying to Hurt You

This is the one that really stings. That beautiful, melt-in-your-mouth, marbled *shimofuri* beef is apparently not the prize we think it is.

The doctor points out that all that fat woven into the meat—the very thing that makes it so expensive and delicious—is a problem. It's the same issue as the nuts and cheese: excess fat intake, visceral fat, inflammation. He even notes that this obsession with marbled meat is a uniquely Japanese thing; in the West, leaner red meat is what's considered good.

And the final blow? Your yakiniku sauce is probably loaded with sugar. So you're getting a double whammy of excess fat from the meat and a massive sugar spike from the sauce. Fantastic.

And the Konbini Breakfast Sandwich...

Finally, he comes for processed meats. We're talking bacon, ham, sausages, hot dogs—basically the entire hot-case section at 7-Eleven and the fillings for half the sandwiches.

These are apparently bad for a trifecta of reasons: they're packed with salt (bad for blood pressure), full of saturated fat (see above), and the high-heat cooking process creates compounds called AGEs that cause inflammation and stress on your body and brain.

So, that quick bacon-and-egg sando on the way to work might not be the best idea after all. Suddenly, natto and rice is looking pretty good again.