You probably know someone who has been told their blood sugar is "a bit high."
For many adults, that gray zone sits quietly between normal and type 2 diabetes. What you put on your plate may matter more here than many realize.
About 115 million US adults have prediabetes, and more than 8 in 10 don't know they have it, according to the CDC.
The Diabetes Prevention Program trial that underpins the agency's program cut the risk of developing type 2 diabetes by 58 percent in adults at high risk.
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Seven ordinary foods keep showing up in the evidence for steadier blood sugar. They are beans and lentils, leafy greens like spinach, whole oats, nuts such as almonds and walnuts, berries, vinegar in salad dressings, and cinnamon.
The seven foods
Beans and lentils are the plainest example. A 2009 meta-analysis in Diabetologia found that pulses on their own lowered fasting blood glucose and insulin. Pulses inside low-glycemic-index diets also lowered HbA1c.
HbA1c is a marker of average blood sugar over the past three months.
Leafy greens like spinach and kale come next. A 2010 systematic review in the BMJ pooled six prospective cohort studies. Higher green leafy vegetable intake was linked to a 14 percent lower risk of developing type 2 diabetes.
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Whole oats work mainly through beta-glucan, a soluble fiber that forms a gel in the gut and slows glucose uptake.
A meta-analysis in Nutrients pooled trials in people with type 2 diabetes. Oats intake lowered HbA1c by about 0.42 percentage points, and modestly cut fasting glucose.
Nuts show a similar pattern. A meta-analysis of 12 randomized trials in PLOS ONE found that eating about 56 grams of tree nuts a day for eight weeks lowered both HbA1c and fasting glucose in people with diabetes. That is roughly a small handful.
Berries carry anthocyanins, the pigments that give blueberries and raspberries their color.
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A 2019 randomized trial in Nutrients reported that an anthocyanin-rich mixed-berry breakfast lowered the insulin response in overweight and obese adults. The glucose difference did not quite reach statistical significance.
Vinegar is the most surprising entry. A 2017 systematic review in Diabetes Research and Clinical Practice pooled clinical trials. Vinegar produced a significant drop in both post-meal glucose and insulin compared with controls.
Splashed on a salad or stirred into a dressing is enough to count.
Cinnamon comes last, with more caveats. Pooled trials in people with type 2 diabetes suggest it can lower fasting glucose and HbA1c. But results are inconsistent, and the HbA1c effect in particular is small and contested.
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What this means at breakfast and dinner
None of these foods replaces a prescription. They are everyday swaps the CDC and researchers link with better blood sugar. Think beans in soup, spinach in an omelet, oats for breakfast, a handful of almonds, berries on yogurt, vinegar in dressing, cinnamon on oatmeal.
If you have a family history of type 2 diabetes or symptoms like extreme thirst, frequent urination or unexplained fatigue, ask your doctor about a prediabetes blood test. The CDC's National DPP website also offers a free one-minute risk test.
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This article is made and published by Ida-Marie Palm Varbæk, who may have used AI in the preparation.