Nutrition per 100g
Longan for Gestational Diabetes
Longan, often called 'dragon's eye,' is a tropical fruit related to lychee and rambutan, native to Southeast Asia. It features a thin, tan-colored, brittle shell enclosing a translucent, juicy pulp that surrounds a single black seed. The flavor is sweet and musky, offering a unique taste experience that is less aromatic than lychee but equally delicious. Beyond its culinary uses, longan has been utilized in traditional Chinese medicine for centuries for its purported calming and nourishing properties. It is a good source of Vitamin C and other antioxidants.
At a glance
Pregnancy safety
SafeBlood sugar impact
mediumCarbs / 100 g
15.1gIs Longan safe with gestational diabetes?
Longans should be approached with caution for those managing gestational diabetes due to their high concentration of natural sugars. While they offer Vitamin C and other nutrients, their moderate glycemic index means they can impact blood sugar levels if not consumed carefully. Strict portion control is essential to incorporate this fruit into a GD-friendly diet without causing a significant glucose spike. Consider them an occasional treat rather than a daily staple fruit. Always prioritize fruits with a lower sugar and higher fiber content.
How does Longan affect blood sugar during pregnancy?
The primary concern with longan is its carbohydrate content, which is almost entirely composed of simple sugars like sucrose and fructose. These sugars are absorbed relatively quickly, leading to a potential rise in blood glucose. With a moderate glycemic index (GI), a serving of longan can cause a more pronounced blood sugar response compared to low-GI fruits like berries. The impact is directly related to the portion size, making it critical to limit how many you eat in one sitting to prevent hyperglycemia.
What is a safe portion of Longan for gestational diabetes?
A safe portion of longan is very small, typically around half a cup of peeled fruit, which equates to about six to eight individual longans. This limited serving helps keep the total carbohydrate and sugar load within a manageable range for gestational diabetes. It is highly recommended to test your blood sugar one to two hours after consuming longans to understand your personal tolerance. If you notice a significant spike, you may need to reduce the portion size further or avoid the fruit entirely.
How should I combine Longan to manage blood sugar during pregnancy?
To mitigate the blood sugar impact of longans, it is crucial to pair them with foods rich in protein, healthy fats, and fiber. This strategy helps slow down the absorption of sugar into the bloodstream. For example, enjoy a small portion of longans alongside a handful of almonds, a serving of plain Greek yogurt, or a piece of cheese. Avoid eating them on an empty stomach or as a standalone snack. This balanced approach allows for better glycemic control while still enjoying the fruit's unique flavor.
Last reviewed: August 31, 2026
Important Safety Information
Every pregnancy is different, and gestational diabetes is managed differently depending on your readings, your medication and how far along you are. The ratings and portions on this page are general information — not a diagnosis, a treatment plan or a medical device — and they cannot see your results.
- Low blood sugar:
- If you take insulin or diabetes medication, eating less carbohydrate than your team planned for can push your blood sugar too low. Treat a reading below 70 mg/dL (3.9 mmol/L), or symptoms such as shaking, sweating, confusion or a racing heart, with fast-acting carbohydrate immediately and retest after 15 minutes. Never use this page as a reason to skip or shrink a meal you were told to eat.
- Carbohydrate and ketones:
- Cutting carbohydrate hard to force a number down is not safe in pregnancy — it can produce ketones. Published guidance sets a minimum of 175 g of carbohydrate per day in pregnancy. Readings that stay above target for several days need your care team, not a smaller portion.
- Medication and insulin:
- The portions here are generic and know nothing about your insulin doses, your metformin, or the steroids given to mature your baby's lungs — all of which change how a meal affects you. Never adjust a dose or a mealtime based on this page.
- Food safety in pregnancy:
- Blood sugar is not the only thing that makes a food suitable while you are pregnant. Some foods with excellent glycemic numbers still carry mercury, vitamin A, listeria or alcohol risks, and those are judged separately from the ratings shown here. Check your national pregnancy food-safety guidance before adding an unfamiliar food.
- What these ratings can and cannot tell you:
- Glycemic index values, impact ratings and maximum servings are population averages taken from published tables. Two people eating the same food can get very different readings, so your own meter is the only measurement that describes you. Nutrition figures are indicative per 100 g and vary with brand, ripeness and preparation.
Contact your care team the same day if: your readings stay above target for several days; you have a reading below 54 mg/dL (3.0 mmol/L) or needed someone else's help to treat a low; you test positive for ketones; or your baby is moving less than usual. Seek emergency care for confusion, fainting, repeated vomiting, or a low you cannot bring back up.
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Sources & Editorial Review
Content independently developed by Dalo Labs ApS, informed by the American Diabetes Association's Standards of Care in Diabetes, ACOG's gestational diabetes guidelines, and the IADPSG consensus criteria. Not endorsed by or affiliated with any referenced organization. · Last reviewed: August 2026
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