Mussels are bivalve mollusks farmed (aquaculture) or wild-caught. Common species – blue mussel (Mytilus edulis – North Atlantic), Mediterranean mussel (M. galloprovincialis), green-lipped mussel (Perna canaliculus – New Zealand), California mussel (M. californianus). Per 3 oz cooked (~85 g) – 145 calories, 7 g carbohydrate (from glycogen), 20 g protein, 4 g fat (1 g saturated, including some omega-3), 50 mg cholesterol, 380 mg sodium (cooked broth). Low glycemic impact – small glycogen carb has limited effect. Excellent for diabetes meal planning. Benefits – very high quality protein; moderate-low fat; OMEGA-3 fatty acids (more than most shellfish); EXCEPTIONAL nutrient density – B12 (1300+% DV per 3 oz – among highest); iron (32% DV); selenium (90% DV); manganese (170% DV); zinc, copper; very sustainable seafood choice (Best Choice on Seafood Watch). Concerns – 7 g carb per 3 oz (modest but not zero); sodium varies (broth-cooked higher); cholesterol moderate; shellfish allergy potential. Multiple preparations worldwide – moules marinières (sailor’s mussels – classic French/Belgian; steamed in white wine, shallot, parsley, butter); moules frites (Belgian classic with French fries – limit fries); mussels in tomato sauce (Italian-style with garlic, tomato, white wine, basil); cioppino; bouillabaisse; Spanish mussels with chorizo; Thai mussels with curry and coconut milk; Chinese black bean mussels; stuffed mussels (Mediterranean); mussel chowder; cold mussel salad; pickled mussels (Spanish escabeche); mussels with white beans and tomato; steamed mussels with garlic and herbs; smoked mussels (canned). Sustainability – aquaculture mussels (most commercial) considered very environmentally friendly; filter feed; clean water; don’t require fish feed. Many diabetes-friendly preparations. Best preparations – moules marinières without bread (or small bread portion); mussels in tomato sauce (Italian-style with vegetables); steamed mussels with garlic and herbs (no fries); Thai mussels with curry (watch coconut milk portion); Spanish mussels with chorizo (small chorizo portion; lots of vegetables); mussel salad (cold mussels + lemon + olive oil + vegetables); cioppino with multiple seafoods; stuffed mussels (small portion stuffing); Asian-style with ginger and scallion. Watch portions of moules frites (large fries portion – very high carb), large bread portions, cream-heavy preparations, sweetened glazes.
Mussel Nutrition Per 3 oz Cooked
| Nutrient | Amount |
|---|---|
| Calories | 145 |
| Carbohydrate | 7 g |
| Protein | 20 g |
| Fat (total) | 4 g |
| Saturated fat | 1 g |
| Omega-3 | 670 mg |
| Vitamin B12 | 1300+% DV |
| Iron | 32% DV |
| Selenium | 90% DV |
| Manganese | 170% DV |
| Sodium | 380 mg (cooked in broth) |
Sustainability Notes
| Source | Sustainability Rating |
|---|---|
| Farmed (aquaculture) | Best Choice (Seafood Watch) |
| Wild-caught (managed) | Good Alternative |
| Filter feeders | Don’t need fish feed; clean water |
| Environmentally friendly | One of most sustainable seafoods |
| Red tide warning | Avoid wild harvest during algal blooms |
Diabetes-Friendly Preparations
- Moules marinières (without bread or small bread portion).
- Mussels in tomato sauce (Italian-style).
- Steamed mussels with garlic, herbs, white wine.
- Thai mussels with curry (watch coconut milk).
- Spanish mussels with chorizo (small chorizo portion).
- Cold mussel salad with lemon and olive oil.
- Cioppino (Italian seafood stew).
- Bouillabaisse (French Provençal).
- Chinese black bean mussels.
- Stuffed mussels (small stuffing portion).
- Mussels with white beans and tomato.
- Asian-style with ginger and scallion.
- Smoked mussels (canned – convenient).
Foods to Limit
- Moules frites (very large fries portion).
- Large bread portions for sopping broth.
- Cream-heavy preparations.
- Sweetened glazes.
- Pickled mussels with added sugar.
- Mussel pasta with large pasta portion.
- Heavy butter sauces.
Selection and Preparation
- Buy from reputable source.
- Live mussels – shells tightly closed (or close when tapped).
- Discard mussels with broken shells.
- Buy day of cooking.
- Refrigerate covered with damp towel.
- Smell ocean-fresh, not fishy.
- Scrub shells; remove beard.
- Cook in liquid covered until shells open (5-7 minutes).
- Discard mussels that don’t open after cooking.
- Eaten by sucking meat from shells.
- Avoid wild harvest during red tide warnings.
- Commercial farmed generally very safe.
Sustainability Spotlight
- Mussels among most sustainable seafood.
- Aquaculture environmentally beneficial.
- Filter feeders clean water.
- Don’t require fish feed (unlike farmed fish).
- Low carbon footprint.
- Monterey Bay Aquarium Seafood Watch Best Choice.
- Growing aquaculture industry.
- U.S., Canada, New Zealand, Spain major producers.
The Bottom Line
Mussels are bivalve mollusks farmed (aquaculture) or wild-caught. Common species – blue mussel, Mediterranean mussel, green-lipped mussel, California mussel. Per 3 oz cooked – 145 calories, 7 g carbohydrate (from glycogen), 20 g protein, 4 g fat (1 g saturated, including some omega-3), 50 mg cholesterol, 380 mg sodium. Low glycemic impact. Excellent for diabetes meal planning. Benefits – very high quality protein; moderate-low fat; OMEGA-3 fatty acids (more than most shellfish); EXCEPTIONAL nutrient density – B12 (1300+% DV per 3 oz – among highest); iron (32% DV); selenium (90% DV); manganese (170% DV); zinc, copper; very sustainable seafood choice. Concerns – 7 g carb per 3 oz; sodium varies; cholesterol moderate; shellfish allergy potential. Multiple preparations worldwide – moules marinières (French/Belgian classic); moules frites (limit fries); mussels in tomato sauce (Italian); cioppino; bouillabaisse; Spanish with chorizo; Thai with curry; Chinese black bean; stuffed; chowder; cold salad; smoked (canned). Aquaculture mussels – Best Choice on Seafood Watch; environmentally friendly. Diabetes-friendly preparations – moules marinières without bread; tomato sauce style; steamed with garlic and herbs (no fries); Thai with curry (watch coconut milk); Spanish with chorizo (small portion); cold mussel salad; cioppino; bouillabaisse; Asian-style; smoked. Limit moules frites (large fries portion – very high carb), large bread portions, cream-heavy preparations, mussel pasta with large pasta portion. Selection – live mussels, shells tightly closed; buy day of cooking; discard broken shells. Cooking – liquid in pot; cover; cook 5-7 minutes until shells open; discard any that don’t open. Safety – red tide warnings for wild harvest; commercial farmed regularly tested. For adults with type 2 diabetes – mussels are excellent low-carb high-protein seafood with exceptional B12, iron, selenium, manganese content; among most sustainable seafood choices; particularly valuable for metformin users at risk of B12 deficiency; many delicious diabetes-friendly preparations available; emphasize broth, tomato, and herb-based versions over fries and cream. See our broader diabetes diet guide for context.
