Blueberries vs grapes for blood sugar: Which fruit is better for keeping glucose levels stable?

Blueberries or grapes: Which fruit is better for blood sugar control? Both blueberries and grapes contain natural sugar, vitamins and beneficial plant compounds, but they affect blood glucose in a different way. According to dietitians, blueberries have a slight advantage because they contain more fiber and fewer carbohydrates per cup than grapes.

But you can also make grapes a part of your healthy diet provided you eat them in right portion and pair them with protein, healthy fats or other fiber-rich foods. Dieticians have shared their views about how blueberries and sugar affect blood sugar and how to eat them for better glucose control.

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How do blueberries affect blood sugar?

According to a report in EatingWell, blueberries contain natural sugar and carbohydrates, so eating them can raise blood sugar. However, they also provide fiber, which slows digestion and helps glucose enter the bloodstream more gradually. One cup of blueberries contains approximately 84 calories, 22 grams of carbohydrates, 15 grams of sugar and 4 grams of fiber.

According to dietitian and diabetes educator Caroline Thomason Bunn, the fiber in whole fruit helps slow digestion. This means blueberries may cause a more gradual rise in blood sugar than fruit juice, which often contains little or no fiber.

Blueberries also contain anthocyanins, plant compounds that give them their deep blue color. These compounds have antioxidant properties and may help support glucose regulation. Research reviewed by dietitian Vandana Sheth has also found improvements in fasting blood glucose and A1C in people with diabetes consuming blueberries or cranberries.

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How do grapes affect blood sugar?

Grapes are nutritious, but they contain more carbohydrates and sugar and less fiber than blueberries. One cup of grapes provides approximately 125 calories, 29 grams of carbohydrates, 25 grams of sugar and 1.4 grams of fiber. Because of this difference, eating one cup of grapes may lead to a sharper rise in blood sugar than eating the same amount of blueberries.

However, grapes do not need to be avoided simply because they contain natural sugar. They provide water, vitamins, fiber and beneficial plant compounds. Red and purple grapes contain anthocyanins, while grape skins also contain resveratrol, an antioxidant.

Research on grapes and grape products has suggested potential benefits for insulin resistance, although findings on fasting blood glucose and A1C have been mixed. Some studies have examined grape products rather than fresh grapes, so the results may not apply directly to eating whole grapes.

Blueberries vs grapes: Which is better for blood sugar?

Dietitians give blueberries a slight advantage when it comes to blood sugar management. They contain more fiber and fewer total carbohydrates per cup than grapes. There is also research examining the potential benefits of berries for glucose regulation. The higher fiber content and lower carbohydrate content of blueberries may help limit the rise in blood sugar compared with grapes.

But you need not need to remove grapes from your diet because portion size, the rest of the meal and an individual's response to carbohydrates also influence blood sugar levels.

How to eat blueberries and grapes for better blood sugar control

Pairing fruit with foods that contain protein, healthy fats or fiber can help slow digestion and make a snack more satisfying. Here are some simple ways to enjoy both fruits.

• - Add blueberries to Greek yogurt: Greek yogurt provides protein, while nuts or chia seeds can add fiber and healthy fats.
• - Pair grapes with nuts or cheese: These foods provide protein and fat, making the snack more balanced.
• - Add fruit to smoothies: Blend blueberries or grapes with Greek yogurt, milk or protein powder and a tablespoon of almond butter.
• - Include fruit with lunch: Eat a measured serving of either fruit alongside a meal that contains a protein source. Blueberries can also be added to salads, while grapes work well in chicken salads.