Most people think that all fruits are good for health. Not completely. Fruit contains valuable vitamins, minerals, and antioxidants, but some varieties contain far more sugar than you might realize. And even natural sugars can affect your gut health, metabolism, and weight when consumed in excess.
That’s why, as a cardiac surgeon, I always recommend choosing fruits that are low in carbohydrates and rich in polyphenols. Also, I treat fruit like “nature’s candy.” Instead of enjoying it endlessly, enjoy it carefully.
Here are nine low-sugar fruits that I think are some of the healthiest options.
1. Citrus fruits
Grapefruit, mandarin oranges, and kumquats are naturally low in carbohydrates and rich in vitamin C. It also contains flavonoids, which are polyphenols that support a healthy gut microbiome.
Do not remove the white core. It is one of the most nutritious parts. And kumquats? The skin is also eaten whole, making it an easy and tangy addition to salads and stir-fries.
2. Berries
Blueberries, raspberries, and blackberries are my absolute favorites. Although it is low in carbohydrates, it is rich in dietary fiber and polyphenols.
Whenever possible, I always recommend eating berries that are in season. Choose wild blueberries instead of the giant blueberries you find at the supermarket. They tend to be richer in antioxidants than the extra-large versions on the market.
3. Pomegranate
Pomegranate is a true superstar. It is rich in polyphenols such as punicalagin, which supports heart and cell health. Despite its sweet flavor, it is relatively low in sugar compared to other tropical fruits.
Plus, the crunchy seeds add dietary fiber, a dual benefit for your gut and metabolism.
4. Avocado
Yes, avocado is technically a fruit, and one of the very best fruits. It contains little sugar, is rich in healthy monounsaturated fats, and is high in potassium and fiber.
In my opinion, avocado is the most perfect fruit you can eat. It keeps you full without causing blood sugar spikes, supports your heart, and nourishes your intestines. I basically eat avocado every day to get the most health benefits.
5. Olive
Are you surprised? Olives are also a fruit and are high on my list. They contain virtually no sugar and are rich in healthy fats and powerful polyphenols, especially hydroxytyrosol, one of the best types of polyphenols to nourish your gut pals.
That’s why olives and extra virgin olive oil are staples in my recommended diet to support heart, brain, and gut health.
6. Kiwi
Kiwi (in moderation) makes my list because it has less sugar than many tropical fruits and is high in vitamin C, fiber, and antioxidants.
The secret is to eat the skin! Yes, it’s a vague part because it has a lot of fiber and polyphenols in it. Recent research shows that kiwi is rich in serotonin, which can also help improve your sleep quality.
7. Green banana
Unripe bananas are not sweet. That’s exactly what matters. They contain resistant starch, a prebiotic fiber that feeds beneficial gut bacteria and supports stable blood sugar levels. When a banana ripens, its starch turns into sugar, reducing its benefits.
We recommend blending green bananas into smoothies or chopping them up with yogurt, cinnamon, and a low-sugar sweetener. Green banana flour is also an easy option.
8. Green Mango
Like green bananas, green (unripe) mangoes contain resistant starch, antioxidants, and significantly less sugar than orange, ripe mangoes. Supports digestion and metabolism while providing vitamin C.
Add green mango salad (a staple at many Thai restaurants) to your meals easily.
9. Passion fruit
Small but nutritious, passion fruit is lower in carbohydrates than many tropical fruits and rich in polyphenols, vitamin A, and dietary fiber. Its crunchy seeds act as a natural prebiotic.
I just went to France and Italy and passion fruit was appearing everywhere from salads to desserts. If you’re traveling in July or August, or the seasonal fall months, look for them.
My approach to improving long-term health is simple. Choose fruits that are low in sugar and high in fiber and polyphenols, compounds that support gut health and more stable energy. But of course, you should always consult your doctor before making any drastic changes to your diet.
Dr. Stephen Gundry is a retired cardiac surgeon, founder of Gundry MD, and author of the best-selling books “The Gut-Brain Paradox” and “The Plant Paradox.” For over 20 years, his research has focused on the role of the microbiome in chronic disease and longevity. He earned degrees from Yale University and the Medical College of Georgia, and completed his surgical residency at the University of Michigan. Follow him on Instagram. @drstevengundry.
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