Prediabetes diet on a plate
What to put on the plate when blood sugar sits above normal, and why it helps.
What should you eat on a prediabetes diet?
A prediabetes diet fills half a nine-inch plate with non-starchy vegetables, a quarter with lean protein and a quarter with quality carbs such as beans, whole grains or fruit. The American Diabetes Association, which sets out this plate, also lists less added sugar as a core change.1
Built from ADA, Harvard and MedlinePlus advice. Reviewed November 13, 2026.Eat more
Eat more of these
Non-starchy vegetables
Half the plate at lunch and dinner: broccoli, greens, peppers.
1/2 platenon-starchy vegetables, ADA plate1
Beans and lentils
A half cup of cooked beans or lentils adds fiber and protein.
25 to 35 gfiber a day at least, Harvard2
Whole grains
Oats, brown rice or quinoa in place of white bread.
2 servingsor more whole grains a day, Harvard3
Fish and seafood
Salmon, sardines or trout as the usual animal protein.
2 timesfish a week, Harvard Mediterranean5
Ease off
Ease off these
Sugary drinks
Soda, sweet tea and energy drinks carry added sugar.
26%higher diabetes risk at 1 to 2 cans a day4
White rice
Brown rice or another whole grain in its place.
17%higher diabetes risk at 5+ servings a week3
Fruit juice
Juice carries about as much sugar as soda, so keep it small.
16%higher risk, 4 oz more sweet drinks a day4
Alma turns these foods into meals that fit your numbers.
Build my planGet Alma on AndroidGet the appA sample day
One day on a plate
BreakfastOats with berries and walnutsRolled oats, blueberries and chopped walnuts.
LunchChickpea and roasted vegetable bowlBrown rice, chickpeas and roasted peppers.
SnackApple with peanut butterOne apple and a tablespoon of peanut butter.
DinnerBaked salmon with greensSalmon, broccoli and a squeeze of lemon.
A1C ranges6
- Normal
- Below 5.7%
- Prediabetes
- 5.7% to 6.4%
- Type 2 diabetes
- 6.5% or above
Average blood sugar over the past 3 months.
What people ask
Can you reverse prediabetes with diet?
MedlinePlus says lifestyle changes, such as regular activity and a healthy eating plan, may help delay type 2 diabetes. The Diabetes Plate is one way to start: half vegetables, a quarter protein, a quarter quality carbs. Ask your clinician which numbers to track.
How do you build a plate that keeps blood sugar steadier?
Start with the Diabetes Plate: half non-starchy vegetables, a quarter lean protein and a quarter quality carbs such as beans, whole grains or fruit. Harvard advice is to reach 25 to 35 grams of fiber a day from whole grains, beans, vegetables and nuts, and to pick whole grains over refined ones.
Is a Mediterranean diet a good fit?
The pattern is built on vegetables, fruit, beans, whole grains, nuts and olive oil, with fish as the usual animal protein at least twice a week. A Harvard review notes that the PREDIMED trial found lower risk of type 2 diabetes in people following a Mediterranean diet with olive oil or nuts.
What foods should you avoid with prediabetes?
Ease off sugary drinks, fruit juice and refined grains such as white rice and white bread. Harvard says regular sugary drinks are linked with a 26% higher risk of type 2 diabetes, and the highest white rice intake with a 17% higher risk. Keep starchy foods to a quarter of the plate.
Which foods help most at meals?
Non-starchy vegetables, beans and lentils, whole grains such as oats and brown rice, fish, nuts, olive oil and whole fruit. Fill half the plate with vegetables and a quarter with a fiber-rich carb. Fiber slows absorption, so whole grains beat refined ones.
Sources (6)
- American Diabetes Association, Eating well and managing diabetes
- Harvard T.H. Chan School of Public Health, Fiber
- Harvard T.H. Chan School of Public Health, Whole grains
- Harvard T.H. Chan School of Public Health, Sugary drinks
- Harvard T.H. Chan School of Public Health, Mediterranean diet
- MedlinePlus, Prediabetes
This guide is general education. Talk with your clinician before changing your diet or medicines.
