Experts reveal the 6 healthy foods that are secretly spiking your blood sugar levels

It’s not just dessert that spikes your blood sugar.

Certain everyday foods, like oat milk, fruit juice, and a bowl of brown rice, that seem healthy might also increase your risk of disease and contribute to stubborn belly fat, leaving you tired, hungry, and craving sugar.

“Oat milk, ‘naked carbs,’ and fresh fruit juices often carry a health halo, but they can cause blood sugar spikes higher than what is considered optimal,” Sarah Steele, a registered dietitian and California metabolic success manager for health platform Signos, told Fox News Digital.

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“Similarly, many packaged foods marketed as plant-based, vegan or gluten-free are highly refined versions of what were once whole foods, making them much more likely to elevate glucose levels,” she said.

Frequent spikes in blood sugar force your body to release more insulin, and over time, your cells stop responding to it – a process called insulin resistance, which can lead to type 2 diabetes.

Some common, healthy foods can raise your blood sugar, but simple swaps can help keep it stable. (iStock)

Nearly half of Americans have insulin resistance and about 13 percent have diabetes, according to the Centers for Disease Control and Prevention.

Even for people without diabetes, fluctuations in blood sugar can lead to fatigue, hunger, irritability and cravings, experts say, but a few smart swaps and strategic timing of your meals can help keep blood sugar stable.

1. Oat milk

Oat milk can cause blood sugar spikes because it is high in starches, which break down into high-glycemic simple sugars.

“Nutritionally, it acts a lot like a cup of liquid sugar,” Steele said.

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Experts recommend choosing unsweetened versions and pairing them with protein, fiber, or healthy fats to help slow how quickly sugar enters the bloodstream.

Unsweetened almond milk, coconut milk, and full-fat dairy products can help stabilize blood sugar levels.

Oat milk is dairy-free and low in saturated fat, but its starches can raise blood sugar levels. (iStock)

2. Dried fruits

Dried fruits contain nutrients and fiber, but without the water found in fresh fruits, their natural sugars are more concentrated, so your blood sugar may rise more quickly if you eat too much.

A quarter cup of raisins, for example, contains the same total carbohydrates as about an entire cup of grapes, according to the U.S. Department of Agriculture (USDA).

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One of the easiest ways to maintain stable blood sugar levels while eating dried fruit is to pair them with protein or healthy fats like nuts, seeds or yogurt, according to Verywell Health.

3. “Naked carbohydrates”

Jessie Inchauspé, author of the book “Glucose Revolution,” said one of the biggest mistakes people make is eating “naked carbs,” meaning carbs without protein, fat or fiber.

“A bowl of pasta is naked carbs,” she told the Guardian. “But if you add spinach, chicken and olive oil, you add protein, fiber and fat, which slows the rate at which carbohydrates are digested and glucose gets into the bloodstream.”

Adding protein, fat, or fiber to carbohydrates helps prevent blood sugar spikes. (iStock)

Studies have also shown that eating carbohydrates last – after protein and vegetables – can significantly reduce post-meal blood sugar spikes.

“Food ordering and portion control are your best friends when it comes to keeping simple carbohydrates in your diet without major glucose spikes,” Steele said.

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She also recommended drinking water with carbohydrates and avoiding foods that cause spikes after 3 p.m., when the body is more likely to store excess glucose as fat.

4. Fruit juice

Juice may seem like a vitamin-rich choice, but removing fiber from fruit causes a rapid rise in sugar that can overwhelm the liver and increase the risk of diabetes over time. Even 100% fruit juice can cause blood sugar spikes, research shows.

“The best options are often the simplest,” Steele said. “Choose a whole fruit rather than juice.”

Drinks rich in vegetables can help prevent blood sugar spikes caused by pure fruit juices. (iStock)

Experts also recommend blending whole fruits into smoothies, choosing blends with lots of vegetables, and diluting the juice with water.

5. Brown rice

Brown rice is often considered healthier than white rice, but it can still cause noticeable blood sugar spikes because it is primarily starch.

Research has shown that whole grains like barley, quinoa, bulgar and farro can provide a more consistent energy release and better insulin response than rice-based meals.

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Steele recommends building meals around vegetables, quality proteins like fish and chicken, and “slow carbs” like half a sweet potato and quinoa.

Barely and farro may be better than brown rice for blood sugar. (iStock)

6. Granola bars

Many granola bars are loaded with syrup, honey, or sugar as the primary sweeteners and often don’t contain enough fiber, protein, or healthy fats to slow digestion, so the sugars reach the bloodstream quickly.

Dietitians advise choosing bars with less than 6 grams of added sugar and at least 5 grams of fiber.

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Nutrition experts also recommend looking for bars made with nuts, seeds and whole grains, and making sure protein is included to help smooth out spikes.

“After your meal, take time to go for a walk or other gentle movement to help your body process glucose more efficiently,” Steele said.