Pregnancy safety
Limit how much Wakame you eat during pregnancy
No more than about 5 g of dried wakame (roughly a quarter of a cup rehydrated) at a time, two or three times a week.
Wakame is iodine-rich enough that a full cup of rehydrated seaweed can exceed the 1,100 mcg/day iodine upper limit for pregnancy, and sustained excess iodine can suppress the fetal thyroid.
This is about food safety in pregnancy, not blood sugar — it applies whatever your readings look like. Confirm it with your midwife or doctor.
Allergen Information
May contain: shellfish
Nutrition per 100g
Fruits & Vegetables › Seaweed & Algae
Wakame for Gestational Diabetes
Wakame is an edible seaweed with a subtly sweet, briny flavor and a tender, silky texture. A staple in Japanese cuisine, it's most famously used in miso soup and seaweed salads. This sea vegetable is highly nutritious, prized for its rich concentration of minerals, particularly iodine, magnesium, and calcium. It also contains beneficial compounds like fucoxanthin, which has been studied for its potential health benefits. Its low calorie and carbohydrate content make it a versatile and healthy addition to many diets.
At a glance
Pregnancy safety
LimitBlood sugar impact
lowCarbs / 100 g
9.1gIs Wakame safe with gestational diabetes?
Wakame is an exceptional food choice for managing gestational diabetes due to its negligible carbohydrate content and very low glycemic index. It provides essential nutrients like calcium and iron without posing a risk to blood sugar stability. Its iodine content, however, is high enough that the amount you use is set by iodine rather than by carbohydrate, and its naturally high sodium content is a further consideration, as managing blood pressure is also crucial during pregnancy. Therefore, while it is excellent for blood sugar, it belongs in your diet as a small, occasional garnish rather than as a serving of vegetables.
How does Wakame affect blood sugar during pregnancy?
With a glycemic index near zero, wakame has virtually no impact on blood glucose levels. The small amount of soluble fiber it contains can actually help to slow the absorption of carbohydrates from other foods in the same meal, promoting better overall glycemic control. Different cooking methods, such as boiling for soup or soaking for salad, do not alter its beneficial low-glycemic properties. This makes it a reliable and safe ingredient for stabilizing post-meal blood sugar readings.
What is a safe portion of Wakame for gestational diabetes?
A suitable portion is about 5 g of dried wakame, which comes to roughly a quarter of a cup once rehydrated, two or three times a week. This amount delivers a good dose of minerals and fiber with minimal calories and carbohydrates, and keeps your iodine intake comfortably inside the pregnancy limit. When incorporating it into dishes like miso soup, be mindful of the total sodium content of the broth and other ingredients. Rinsing the rehydrated wakame before use can help to remove some of the excess surface salt. If you are also taking a prenatal vitamin containing iodine or eating other seaweeds, count those in and keep the wakame at the smaller end.
How should I combine Wakame to manage blood sugar during pregnancy?
To create a balanced, blood-sugar-friendly meal, pair wakame with sources of lean protein and healthy fats. For example, add it to a salad with grilled chicken or salmon and a light vinaigrette made with olive oil. In a soup, combine it with tofu and other non-starchy vegetables. The protein and fat will further blunt any potential glucose response from the overall meal, while the wakame adds volume, fiber, and micronutrients, enhancing satiety and nutritional value without adding carbs.
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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