Foods That Promote Insulin Production: A Guide

By Ray Baker

The number of people living with diabetes rose from 200 million in 1990 to 830 million in 2022 [1]. If you are over 50, that figure may feel personal. It often pushes people to hunt for foods that promote insulin production, hoping a single list will fix things. I understand the appeal, but the useful answer is a little different: after 50, most people need to protect the cells that make insulin and lower the daily demand, not force the pancreas to work harder.

Should you chase foods that promote insulin production?

Not usually as a single fix. Your pancreas already releases insulin when you eat carbohydrate, so after 50 the practical goal is usually to lower the demand and protect the cells that make insulin. Whole grains, beans, vegetables and healthy fats support steadier blood sugar, which helps the process run more gently.

Key takeaways

• As blood sugar levels rise, the pancreas produces insulin [2].
• Whole and intact grains have a milder effect on blood sugar and insulin than white bread, white rice, and other refined grains [3].
• Some sources of carbohydrate, like vegetables (other than potatoes), fruits, whole grains, and beans, are healthier than others [3].
• A healthy diet, regular physical activity, maintaining a normal body weight and avoiding tobacco use are ways to prevent or delay the onset of type 2 diabetes [1].
• This is general information, not medical advice.

What does insulin do after a meal?

When you eat a food containing carbohydrate, your digestive system breaks down the digestible parts into sugar, which enters the blood. As blood sugar levels rise, the pancreas produces insulin, a hormone that prompts cells to absorb blood sugar for energy or storage [2]. That is why carbohydrate foods are the most direct dietary signal for insulin release. The process is normal and necessary, but the type and amount of carbohydrate change how fast and how hard the system works.

In type 2 diabetes, muscle and other cells may stop responding well to insulin. Blood sugar and insulin stay high after eating. Over time, the heavy demands made on the insulin-making cells wears them out, and insulin production eventually stops [2]. So after 50, the idea of chasing more insulin can miss the point. The more useful target is usually a steady, lower demand, not another list of foods that promote insulin production.

Why do refined carbs ask more of your pancreas?

Simple and highly refined carbohydrates break down quickly. Simple carbohydrates are easily and quickly utilized for energy by the body because of their simple chemical structure, often leading to a faster rise in glucose levels and insulin secretion from the pancreas [2]. White bread and white rice are common examples. Bran and fiber slow the breakdown of starch into glucose, thus maintaining a steady blood sugar rather than causing sharp spikes [4].

Refining wheat strips away more than half of wheat’s B vitamins, 90 percent of the vitamin E, and virtually all of the fiber [4]. That matters more than the total carbohydrate number for many people. Eating too many refined carbohydrates (white bread and pasta, cookies, soda) without also including other foods like protein and vegetables can lead to hypoglycemia because this can quickly spike blood sugar; in response the pancreas may produce too much insulin to help lower the blood sugar quickly, causing a “sugar crash” [5]. The main message of the Healthy Eating Plate is that the type of carbohydrate in the diet is more important than the amount of carbohydrate in the diet, because some sources of carbohydrate, like vegetables (other than potatoes), fruits, whole grains, and beans, are healthier than others [3].

Which foods keep blood sugar steadier?

These staples sit at the top of my practical list. The Healthy Eating Plate notes that whole and intact grains such as whole wheat, barley, wheat berries, quinoa, oats, brown rice and foods made with them, such as whole wheat pasta, have a milder effect on glucose levels and insulin than their refined counterparts [3]. That does not mean you must avoid all refined grains, but swapping most serves toward the whole version is one of the more useful changes after 50.

Vegetables and most fruits also fit well. Make them the centre of the meal, not an afterthought. The plate suggests half your plate should be vegetables and fruits, with potatoes not counted as vegetables because of their negative impact on blood sugar [3]. I would add beans and lentils to this group too. They bring carbohydrate and fibre without the quick spike many people get from white flour.

If you want a longer list of Mediterranean habits that fit this idea, read our article on foods that improve insulin sensitivity using Mediterranean habits.

What about protein and healthy fats?

Protein and fat do not raise blood sugar the way refined carbohydrate does. Fish, poultry, beans and nuts are healthy protein sources on the Healthy Eating Plate, and they pair well with vegetables [3]. Healthy plant oils are encouraged in moderation, and the plate suggests choosing healthy vegetable oils like olive, canola, soy, corn, sunflower, peanut and others [3].

I think of them as steady companions. They slow a meal down, help you feel full, and reduce the temptation to fill the rest of the plate with white bread or potatoes. For a simple lunch, I would put canned beans or a piece of fish next to a big salad and leave the rest to olive oil and lemon.

If insulin resistance is the part you are worried about, our guide on preventing insulin resistance after 50 covers portions, sleep and walking in plain terms.

What are 5 easy tips for steadier insulin?

1. Make most of your meal vegetables and fruits, 1/2 of your plate, and remember that potatoes don’t count as vegetables on this guide [3].
2. Choose whole grains, 1/4 of your plate, including barley, wheat berries, quinoa, oats, brown rice and foods made with them, like whole wheat pasta, instead of their refined counterparts [3].
3. Fish, poultry, beans and nuts are all healthy, versatile protein sources on the plate [3].
4. Drink water, coffee or tea and skip sugary drinks [3].
5. A healthy diet, regular physical activity and maintaining a normal body weight are ways to prevent or delay the onset of type 2 diabetes, according to WHO [1].

Frequently asked questions

Can fruit raise insulin too much?

Fruit contains natural sugar, but most people do not need to avoid whole fruit in sensible portions. The guide says to make most of your meal vegetables and fruits, 1/2 of your plate, and to aim for color and variety [3]. Pair fruit with yoghurt or nuts for a steadier meal.

Do protein foods stop insulin production?

No, insulin is still released after carbohydrate. Fish, poultry, beans and nuts are all healthy, versatile protein sources on the plate, and they pair well with vegetables [3].

Should I cut out white bread entirely?

You do not have to be perfect. Whole and intact grains have a milder effect on glucose levels and insulin than their refined counterparts [3].

Can skipping meals help my pancreas?

Skipping meals is not a reliable tool. As blood sugar levels rise after eating carbohydrates, the pancreas produces insulin [2], so a steady, balanced plate pattern may feel more predictable than long gaps that leave you hungry.

How much water should I drink for steadier insulin?

There is no single insulin number to chase. It simply advises drinking water, coffee or tea and skipping sugary drinks [3]. Let thirst guide you and keep sugary drinks occasional.

Is this advice the same for type 1 diabetes?

No. Type 1 diabetes is different and needs individual medical care. This article is for general education, not a personal treatment plan, and cannot replace advice from your doctor or dietitian.

Honest take

I would not obsess over foods that promote insulin production as if they were a hidden cure, because the more useful job is to protect the cells that make insulin and lower the daily demand with whole grains, beans, vegetables, fruit and regular movement [1][3].

References

1. WHO. Diabetes. 14 November 2024. https://www.who.int/news-room/fact-sheets/detail/diabetes
2. The Nutrition Source. Carbohydrates and Blood Sugar. https://nutritionsource.hsph.harvard.edu/carbohydrates/carbohydrates-and-blood-sugar/
3. The Nutrition Source. Healthy Eating Plate. https://nutritionsource.hsph.harvard.edu/healthy-eating-plate/
4. The Nutrition Source. Whole Grains. https://nutritionsource.hsph.harvard.edu/what-should-you-eat/whole-grains/
5. The Nutrition Source. Diabetes Prevention. https://nutritionsource.hsph.harvard.edu/disease-prevention/diabetes-prevention/

Get well and stay well,
Ray Baker