Low Glycemic Diet vs Keto: Which Is Better for Prediabetes?

"I am a 79 year old woman who is pre-diabetic and way over weight for my height. I have had gall bladder removed 2017. I'm seriously looking for a simple plan to lose weight but Keto has too much fat. Your plan looks healthy but not 'extreme'."

No, a low glycemic diet is not keto — and the instinct about the fat is a good one, particularly given the gall bladder.

The difference between a low glycemic diet and keto

Keto removes carbohydrate almost entirely, usually under fifty grams a day, and replaces those calories with fat. The mechanism is metabolic: with carbohydrate that low, the body shifts to running on ketones.

A low glycemic diet doesn't remove carbohydrate. It changes which ones, when they arrive, and what they arrive alongside. The mechanism is about the shape of the glucose curve, not the absence of glucose.

In practice a low glycemic day contains oats, fruit, legumes, sweet potato and sometimes bread — foods keto excludes outright.

Why the fat load matters after gall bladder removal

Without a gall bladder, bile is no longer stored and released in a concentrated burst when a fatty meal arrives — it trickles continuously. Many people manage large fat loads perfectly well afterward. Many don't, and they find out unpleasantly.

Keto is a high-fat protocol by design. That isn't a footnote in this situation; it's the whole thing. Your body told you, and you listened.

A low glycemic diet includes fat, but as a component rather than the engine — olive oil, avocado, nuts, the fat that comes with protein — spread across the day rather than concentrated.

Whether that suits you specifically is worth raising with your doctor given your surgical history.

Why "not extreme" is the point, not a weakness

Extreme plans work. That's the trap. They work for four weeks, sometimes eight, produce a real result — and then life happens, and no version of the extreme plan survives a holiday, a hospital stay or a grandchild's birthday.

What's worth having at 79 is something you could still be doing at 84 without it being a project. A rhythm that bends around a cruise and a Christmas and a bad week, and picks back up at the next meal.

Over five years that isn't a lesser goal. It's a far better one.

What the research says about low glycemic eating and A1C

A review pooling fifty-four randomized controlled trials found that, compared with standard diets, low glycemic eating lowered A1C, fasting blood sugar, cholesterol and body weight. The A1C improvements were modest on paper — a few tenths of a point.

Here's why modest matters more than it sounds. In the UK Prospective Diabetes Study, which followed thousands of people already living with type 2 diabetes, every one-point drop in A1C was associated with 37% fewer of the small-blood-vessel complications people most fear.

And notice what those fifty-four trials did not ask people to do. They didn't ban food groups. They didn't require hunger, counting or willpower. They changed what kind and when — not how much.

Try this week: before changing anything else, add protein to breakfast and move your starchy carbohydrate to lunch. Those two moves are the core of the difference between a low glycemic diet and everything you've already tried.

Education, not medical advice. With a prediabetes diagnosis and a surgical history, run any significant change past your doctor first.