Fish stock — glycemic index and gestational diabetes guide

Allergen Information

Contains: Fish

May contain: Shellfish, Soy, Gluten

Nutrition per 100g

Calories8 kcal
Carbohydrates0.5g
of which Sugars0.2g
Fiber0g
Protein1.2g
Fat0.2g
of which Saturated0.1g
Sodium410mg
Glycemic Index0

Herbs & SpicesCondiments and Broths

Fish stock for Gestational Diabetes

low gihydratingwatch sodiumprotein base

Fish stock, or 'fumet' in French cuisine, is a savory liquid made by simmering fish bones, heads, and trimmings with aromatics in water. It serves as a foundational element in many seafood dishes, providing a delicate yet complex depth of flavor. Nutritionally, it is very low in calories and carbohydrates, offering hydration and a source of minerals like iodine and calcium. The simmering process also extracts collagen from the fish bones, which can be beneficial for joint and skin health, making it a nourishing base for soups and sauces.

At a glance

Pregnancy safety

Safe

Blood sugar impact

low

Carbs / 100 g

0.5g

Is Fish stock safe with gestational diabetes?

Fish stock is an excellent choice for managing gestational diabetes due to its negligible carbohydrate and sugar content. It's a hydrating, flavorful liquid that can form the base of many healthy meals without impacting blood glucose. However, the primary concern is the high sodium content often found in store-bought varieties, which can affect blood pressure. Therefore, choosing low-sodium options or preparing homemade stock where you control the salt is highly recommended for regular consumption during pregnancy.

How does Fish stock affect blood sugar during pregnancy?

With a glycemic index of virtually zero, fish stock has no direct impact on blood sugar levels. This makes it a 'free' food from a glucose management perspective, allowing for liberal use as a cooking medium or soup base. Its primary role is to act as a vehicle for other nutrient-dense, low-GI foods like vegetables and lean proteins. Using it to cook quinoa or steam vegetables adds significant flavor without the need for sugary sauces or high-fat ingredients, supporting stable blood glucose control.

What is a safe portion of Fish stock for gestational diabetes?

A typical serving of fish stock is about one cup. This quantity is perfect as a base for a personal-sized soup or for use as the cooking liquid in a seafood and vegetable stew. Since it doesn't affect blood sugar, the portion is more guided by its sodium content and its role in the overall meal. When using a commercial brand, be mindful of the sodium per serving and adjust your daily intake accordingly to maintain healthy blood pressure levels.

How should I combine Fish stock to manage blood sugar during pregnancy?

Fish stock pairs wonderfully with sources of lean protein and non-starchy vegetables to create a balanced, blood-sugar-friendly meal. Use it to poach fish fillets, shrimp, or chicken breast, which adds flavor and moisture without extra fats. It also forms an ideal base for a vegetable-packed soup; add fibrous greens, bell peppers, and zucchini. For a complete meal, incorporate a small portion of a low-GI carbohydrate like barley or farro, cooked directly in the stock to absorb its savory 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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