A lot of what's out there tend to ignore or gloss over the science (that's true for most diet trends), but the ketogenic diet can be traced back to the 1920's, when it was developed as a diet for controlling epilepsy, before the drugs that are mostly used today were developed.

The basic principle is to keep the carbs consumed down while raising the amount of protein and, especially, fat. How low you have to get varies from person to person, generally below 50 carbs/day, though 20-30 is more likely to be successful.

Once the body uses up its reserves of glycogen (about 3 days worth, stored mostly in the liver and also in muscles), it will start converting fat to glycogen for energy. This is called ketogenesis. The trick is to avoid getting your ketones too high, which can turn the blood acidic, and is called ketoacidosis. It can be fatal. But there's a pretty wide range of ketone numbers where you're in ketogenesis before that happens.

There are multiple ways to test your ketones, some are better (or at least more accurate) than others.

Some of the proponents of the keto diet or its offshoots tend to get preachy, telling you to avoid most of the meats and other proteins in stores for reasons that have nothing to do with ketogenisis, eat only organic foods, avoid all gluten, etc.

A cyclical ketogenic diet should be a bit more flexible, allowing some carbs, even (oh, the shame of it all!) wheat. 🙂

Because fats are taste bombs, a ketogenic diet can be very tasty and filling. (Fats also fill you up faster and leave you more satisfied than carbs.)

Tonight, for example, we had a cheese souffle with mushroom sauce, using some almond flour and xanthan gum, cream (watered down), eggs, butter, cheddar cheese and mushrooms. A serving was probably 4-5 carbs (I'm checking it using multiple recipe analysis tools), and it was delicious! By comparison, my traditional souffle recipe (served with canned mushroom soup as a sauce) is more like 30-40 carbs/serving.

Being an engineer by training, I think I'll read some of the scientific papers on ketogenesis as we get further into this, but I don't claim that I'll fully understand them.

Carb-loading in advance of a high-energy output event, like a marathon, is common. Whether it really works is a bit more speculative.

Football players tend to load upon proteins ahead of a game, but steak at 8AM is odd for the rest of us.

Ozempic as a weight loss tool is becoming popular for non-diabetics, so much so that it is impacting the supply chain, but the WSJ recently had an article noting that those who use it to lose weight are likely to gain it right back again when they stop using it, unless they change their eating habits.

Years ago, when the liquid protein diets were the in thing, I knew a doctor who lost over 100 pounds using them. When he stopped, his weight ballooned right back up and he wound up being a good 20 pounds heavier than before.

The breath ketone tester seems to be providing useful information, and it is a lot less expensive than a blood tester which requires strips that cost as much as a dollar each. I may get one anyway, though. More information is usually better than less information. What I've learned is that there are three different ways to measure ketones and each one measures a different type of ketone. I think they should be pretty much in lock step with each other, but being an engineer I like to experiment to prove it. So far, neither of us have hit readings indicating we're approaching ketoacidosis, which is dangerous.

I've lost at least 5 pounds in the last two weeks. I switched which scale I use for my daily readings because the digital one has a lot of variance, I can weigh myself several times and get readings as much as 2 pounds apart. So I'm back to using our platform scale, the kind where you slide a weight to get a reading. I just have to remember to reset it for Diane afterwards.

Earlier this week I started using a new app for meal tracking and recipe analysis. I want to use it for a while before I post specifics, but so far it seems pretty good.