If a blood test just came back in the prediabetes range, the two moves with the strongest evidence behind them are losing a modest amount of weight if there is weight to lose, and changing the shape of your meals so your blood sugar stops spiking the way it has been. Both work on the same underlying problem, which is how much insulin your body has to produce to handle what you eat. Medication, including metformin, is a real option and a conversation to have with your doctor. Nothing on this page replaces that conversation or asks you to delay it. The food work holds either way.

How much weight do I actually have to lose?

Less than you have been told, and there is no line you have to cross before anything starts happening. A 2024 review of randomised trials in people with prediabetes found that lifestyle weight loss raised the chance of returning to normal blood sugar by roughly 11 people in every 100, and lowered the chance of progressing to type 2 diabetes by roughly 8 in every 100, over a median of about two years (Jayedi et al., 2024, American Journal of Clinical Nutrition). The part that matters most for your week: the benefit climbed steadily from 1% of body weight all the way up to 9%. There was no threshold. Two percent was not nothing while you waited for ten.

The same review found no meaningful difference between diet, exercise, and both together. So the honest answer to "which one should I do" is: the one you will still be doing in a year.

Can my blood sugar go back to normal if the scale does not move?

It appears so, and this is one of the more useful findings of the last few years. A post hoc analysis of a randomised prediabetes lifestyle trial found that some people reached prediabetes remission without losing weight, in some cases while gaining it, and that reaching remission still appeared to protect against developing type 2 diabetes (Sandforth et al., 2025, Nature Medicine). The people who responded improved their insulin sensitivity and their beta-cell function, and tended to add fat under the skin rather than around the organs. Because this analysis was looking at a question the trial was not originally designed to answer, treat it as a strong signal rather than the final word.

Read alongside the weight-loss evidence above, the picture is not contradictory. Weight loss helps in proportion to how much of it there is. And the glucose number can move on its own. Which is why the thing worth tracking is what your meals are doing to your blood sugar, not only what the scale says on Sunday.

Where does metformin fit into this?

Metformin is prescribed for exactly this situation and for many people it is the right call. That decision belongs to you and your doctor, who know your numbers, your family history and your risk. The same is true if you are already taking a GLP-1 medication such as semaglutide. What does not change is the food. Medication and meal structure are not competing strategies; they work on different parts of the same problem, and the eating habits you build now are the ones that hold whether or not you stay on a prescription. Nobody is served by waiting to fix dinner until the prescription question is settled.

What do I change in the first week?

Two things, both free, both doable tonight.

Neither of these asks you to give up a food. That matters more than it sounds, because the week after a prediabetes result is exactly when people try to change everything and last nine days.

How do I find out what my own meals are doing?

The reason insulin is so hard to manage is that you cannot feel it. You can feel hunger and you can see the scale, but the insulin load of a particular lunch is invisible, which is why most people guess. That is what the Insulin Fix Score is for: it runs 0 to 100, where a higher score means a lower insulin load, and it weighs glycemic load, protein, fibre, how processed the food is, fat quality, liquid calories and the order you eat things in.

Type your usual breakfast into the Insulin Fix Scanner in one line, the way you would say it out loud, or photograph the plate if that is quicker. You get a score back and the single change worth making to it. Scoring a meal is free and needs no account. Start with the meal you eat most often rather than the one you feel worst about, because the repeated meal is the one that moves your average.

Why does the same advice work for both goals?

Because a meal that scores well for insulin load tends to be a meal you lose weight on anyway. Protein and fibre first, fewer refined starches, fewer calories arriving as liquid, real food over packaged. Those moves raise the score and they also tend to make the next few hours less hungry. You are not running two programmes at once. You are running one, and the blood test and the scale are both reading it.

Common questions

Is prediabetes reversible? Returning to normal blood sugar is a documented outcome in randomised trials, both with weight loss and, for some people, without it. It is not guaranteed and it is not a cure, and it tends to hold only while the habits do.

Do I have to cut carbohydrates completely? No. The evidence above is about order, quality and quantity, not elimination. Putting the rice at the end of the meal instead of the start changes the glucose response without removing the rice.

How long before anything changes? Post-meal glucose responds immediately, which is why food order and a short walk are worth starting tonight. The trials measuring progression to type 2 followed people for around two years, so treat this as a direction rather than a sprint.

Should I ask my doctor about medication? Yes, if you want to. Bring your numbers and ask directly. A prescription and a better dinner are not alternatives to each other.