Yes, people with diabetes can eat raisins. Despite their intense sweetness, raisins have a low to moderate glycemic index, typically landing between 49 and 64 depending on the study and the population tested. That puts them in the same range as many fresh fruits. The key is portion size, because the sugar in raisins is highly concentrated and easy to overeat.
Why Raisins Aren’t as Bad as They Seem
Raisins look like a blood sugar disaster on paper. Per 100 grams, they contain about 79 grams of carbohydrates, with 65 grams of that being sugar. That’s a lot of sugar packed into a small, easy-to-grab handful. But the glycemic index tells a more nuanced story.
Multiple studies have measured the glycemic index of raisins across different populations, including healthy adults, sedentary adults, and people with prediabetes. The values consistently fall in the low to moderate range. In sedentary adults and prediabetic individuals, the GI came in around 50. In other trials with healthy adults, it ranged from 49 to 65. For context, pure white bread scores around 75, and a GI of 55 or below is considered low.
The reason raisins don’t spike blood sugar as dramatically as expected comes down to their sugar composition and fiber content. Raisins contain about 4.5 grams of dietary fiber per 100 grams, which slows digestion. They also contain compounds that appear to moderate the overall blood sugar response. In one study, raisins caused a quick initial rise in blood sugar within the first 30 minutes, but this was followed by a sharp decline. The total area under the curve, a measure of overall blood sugar impact over time, was actually lower than white bread.
How Raisins Compare to Fresh Grapes
You might assume that fresh grapes would be the safer choice, since raisins are just dehydrated grapes with concentrated sugar. Interestingly, research suggests otherwise. In one study, grapes were classified as high-GI foods (above 90 on the bread scale), while raisins came in as low-GI (below 70 on the same scale). The drying process changes the food matrix in ways that seem to slow glucose absorption, likely due to the increased density of fiber and other plant compounds per bite.
Portion Size Is Everything
The glycemic index only tells you how quickly a food raises blood sugar, not how much carbohydrate you’re actually consuming. That depends on how much you eat. And this is where raisins get tricky.
A small box of raisins, the kind you might toss in a lunchbox, is about 1.5 ounces (roughly 43 grams). That tiny box contains around 34 grams of carbohydrates and about 28 grams of sugar. For someone managing diabetes, that’s a meaningful amount of carbs from what feels like a very small snack. It’s easy to eat two or three times that amount without thinking, especially when snacking directly from a larger bag.
A practical serving for someone with diabetes is about one to two tablespoons, or roughly 14 to 28 grams. At the lower end, you’re looking at around 11 grams of carbohydrates, which is much more manageable and leaves room for other foods in a meal or snack.
Smarter Ways to Include Raisins
How you eat raisins matters as much as how many you eat. Eating them alone on an empty stomach will cause a faster blood sugar rise than eating them alongside foods that contain protein, fat, or additional fiber. A handful of raisins mixed with almonds or walnuts, for example, slows gastric emptying and flattens the glucose curve. Sprinkling a tablespoon over plain yogurt or into oatmeal works the same way.
Eating raisins as part of a meal rather than as a standalone snack also helps. When carbohydrates arrive in the gut alongside protein and fat, the sugar absorbs more gradually. This is a general principle of blood sugar management that applies to all carbohydrate-rich foods, not just raisins.
Physical activity also changes the equation. If you’re about to go for a walk or do some exercise, a small portion of raisins can serve as a quick, portable energy source. Your muscles will pull glucose from your bloodstream more efficiently during and after movement, reducing the net impact on blood sugar.
What the ADA Says About Dried Fruit
The American Diabetes Association’s 2025 Standards of Care encourage people with diabetes to eat whole fruits as part of a healthy eating pattern. The guidelines specifically list fresh, frozen, and canned fruit (in its own juice or without added sugar) as acceptable options. Dried fruit like raisins isn’t singled out or excluded, but the emphasis on “whole fruit” reflects a preference for options that are harder to overeat. A cup of fresh grapes takes longer to chew and feels more filling than the same calories in raisin form.
The broader ADA guidance focuses on eating patterns that emphasize nonstarchy vegetables, whole grains, legumes, nuts, seeds, and lean proteins while minimizing sweets, refined grains, and ultraprocessed foods. Raisins, as a minimally processed whole food, fit within that framework when consumed in reasonable amounts.
What to Watch For
Not all raisins are created equal. Some commercial varieties are coated in added sugar or vegetable oil. Check the ingredient list: it should say “raisins” and nothing else. Yogurt-covered raisins, chocolate-covered raisins, and flavored trail mixes with raisins often contain significantly more sugar and fat than plain raisins.
Individual blood sugar responses vary widely. The same serving of raisins can produce a modest rise in one person and a significant spike in another, depending on insulin sensitivity, medications, what else was eaten that day, and activity level. If you’re unsure how raisins affect your blood sugar, testing before eating and 1 to 2 hours after gives you a personal data point that’s more useful than any published glycemic index value.