This article is for informational purposes only and does not constitute medical advice. Always consult your physician or a qualified healthcare provider regarding any medical condition or treatment.
Key Takeaways
A 3-ounce serving of cooked cod provides 20 grams of protein, less than 1 gram of carbohydrate, and only 89 calories.
Cod is among the leanest fish — less than 1 gram of fat per 3-oz serving.
Pacific cod is generally rated more sustainable than Atlantic cod (which has been overfished historically).
Traditional British fish and chips uses cod and adds substantial carbohydrate from batter and fries.
Cod produces no glucose response and works as a daily-staple lean protein.
Cod is one of the leanest, most versatile fish for diabetes meal planning. A 3-ounce serving provides 20 grams of high-quality protein with essentially zero carbohydrate and only 89 calories — fewer calories than chicken breast at equivalent protein content. Cod produces no glucose response and is one of the most affordable white fish options. The mild flavor works across many cuisines and preparation methods, from Mediterranean baked cod with olive oil and herbs to Asian-style steamed cod with ginger. The main considerations are sustainability (Pacific cod is generally rated higher than Atlantic) and avoiding deep-fried preparations like fish and chips, which add substantial carbohydrate and unhealthy fat. Cod is low-mercury and safe for pregnant women.
Nutrition Profile
Cod form (3 oz cooked)
Calories
Protein (g)
Fat (g)
Omega-3 (g)
Baked or broiled (no oil)
89
20
0.7
0.2
Pan-fried in olive oil (1 tsp)
130
20
5
0.2
Poached
89
20
0.7
0.2
Grilled with olive oil
110
20
3.5
0.2
Battered and deep-fried (fish and chips)
260
15
12
0.2
Crispy baked (panko coating)
180
20
5
0.2
Salt cod (bacalao, prepared)
110
22
1
0.2
Cod fish tacos (2 corn tortillas)
250
22
6
0.2
The Lean Protein Advantage
Cod is among the leanest fish available — less than 1 g fat per 3 oz.
The high protein-to-calorie ratio supports satiety with minimal calories.
Useful for weight management with type 2 diabetes.
Substitutes well for higher-calorie proteins (red meat, breaded chicken) in meal planning.
Compared with salmon: cod has half the calories and similar protein, but much less omega-3.
For variety in protein sources, cod balances the higher-fat fish in the rotation.
Atlantic vs Pacific Cod
Atlantic cod (Gadus morhua): harvested from North Atlantic; historically overfished; recovery is gradual. Some stocks (Iceland, Norway) well-managed.
Pacific cod (Gadus macrocephalus): harvested from North Pacific (Alaska, Russia); generally rated more sustainable; abundant.
Nutritionally nearly identical.
Alaskan Pacific cod is widely available, affordable, and well-managed.
Check Monterey Bay Aquarium Seafood Watch for current sustainability ratings.
Baked: 400°F for 12-15 minutes with olive oil, lemon, and herbs.
Broiled: high heat for 8-10 minutes; develops golden top.
Pan-fried: olive oil, medium-high heat, 3-4 minutes per side.
Poached: in seasoned broth, white wine, or coconut milk; gentle cooking.
Grilled: 3-4 minutes per side; works on cedar planks.
Steamed: 6-8 minutes; Asian-style with ginger and scallion.
En papillote: wrapped in parchment with vegetables and herbs; 15 min at 400°F.
Battered and deep-fried: classic fish and chips; not diabetes-friendly.
The Fish and Chips Problem
Traditional British fish and chips: 800-1200 cal per serving.
Batter adds 30-50 g carbohydrate from flour.
Chips (fries) add 40-60 g carbohydrate.
Total carbohydrate: 70-100 g per typical serving.
Deep-frying oil adds substantial unhealthy fat.
Sodium content often substantial.
Better diabetes alternatives: grilled cod with a small side of fries; baked panko-crusted cod; cod fish tacos with corn tortillas (lower carb than flour, smaller portions).
Cuisines Featuring Cod
British: fish and chips, fish pie.
Portuguese: bacalhau (salt cod) in many traditional dishes.
Spanish: bacalao a la vizcaína (salt cod with peppers and tomato).
Italian: baccalà (salt cod) with various sauces.
Caribbean: saltfish (cod) with ackee (Jamaican national dish).
Mexican: cod tacos with corn tortillas, cabbage, lime.
Nordic: poached cod, fish soups.
Asian: steamed cod with ginger, scallion, soy sauce.
Cod vs Other White Fish
White fish (3 oz cooked)
Calories
Protein (g)
Fat (g)
Mercury
Cod
89
20
0.7
Low
Tilapia
110
22
3
Low
Halibut
120
23
2.5
Moderate
Flounder
100
21
1.5
Low
Sole
100
21
1.5
Low
Haddock
89
20
0.7
Low
Pollock
96
20
1
Low
Snapper
109
22
1.5
Moderate
Sea bass
105
20
2
Low
Salt Cod (Bacalao/Bacalhau)
Cod preserved in salt — traditional in Portuguese, Spanish, Italian, Caribbean cuisines.
Requires soaking 24-48 hours with multiple water changes to remove salt.
After soaking and cooking, nutritional profile similar to fresh cod with slightly higher sodium.
Used in many traditional dishes: Portuguese bacalhau à brás, Spanish brandade, Caribbean ackee and saltfish.
For diabetes, salt cod is acceptable when properly soaked and rinsed.
Vitamin and Mineral Profile
Nutrient (3 oz cooked)
Amount
% Daily Value
Vitamin B12
0.9 mcg
38%
Selenium
32 mcg
58%
Phosphorus
117 mg
12%
Niacin
2.1 mg
13%
Vitamin B6
0.3 mg
18%
Iodine
99 mcg
66%
Potassium
208 mg
4%
Mercury and Safety
Cod is rated low-mercury by FDA — safe at 2-3 servings weekly minimum.
Pregnant women can safely eat cod regularly.
Lower in PCBs and dioxins than larger predator fish.
Safe for children with stricter mercury limits.
The FDA “Best Choices” category includes cod.
Pairing Strategies
Baked cod with lemon, garlic, olive oil over green beans or broccoli.
Cod fish tacos with corn tortillas, cabbage slaw, lime, avocado.
Cod with Mediterranean tomato-olive-caper sauce.
Cod en papillote with vegetables and white wine.
Cod with cauliflower mash and roasted vegetables.
Cod chowder with milk or broth-based version (avoid cream-heavy).
Steamed cod Asian-style with ginger, scallion, soy sauce over cauliflower rice.
Who Should Be Careful
People with fish allergy.
People with hypertension who eat salt cod regularly — choose properly soaked or fresh.
People on warfarin — modest vitamin K; consistent intake.
People with shellfish allergy — fish allergies are separate but co-occurrence is possible.
People with thyroid issues — high iodine content; usually beneficial but watch with hyperthyroidism.
Practical Daily Strategies
Keep frozen cod fillets in the freezer — thaws quickly.
Use 1-2 times per week as part of seafood rotation.
Bake at 400°F with olive oil, lemon, herbs — easy weeknight dinner.
Pair with non-starchy vegetables for low-carb, lean meal.
Choose Alaskan Pacific cod or MSC-certified options for sustainability.
Skip battered and deep-fried preparations.
Cod fish tacos with corn tortillas are restaurant-quality dinner option.
The Bottom Line
Cod is one of the leanest, most versatile fish for diabetes meal planning. A 3-oz serving provides 20 g of high-quality protein with essentially zero carbohydrate and only 89 calories — among the lowest calorie protein sources available. Cod is low-mercury and safe for pregnant women and children. The mild flavor works across many cuisines and preparation methods. The main considerations are sustainability (Pacific cod is generally rated higher than Atlantic; Alaskan Pacific cod is a reliable choice) and avoiding deep-fried preparations like traditional fish and chips (which add 70-100 g carbohydrate per serving from batter and fries). Better preparations: baked, broiled, pan-fried in olive oil, grilled, poached, or steamed. Salt cod (bacalao, bacalhau) is acceptable when properly soaked. Cod works in British, Portuguese, Spanish, Italian, Caribbean, Mexican, Nordic, and Asian cuisines. For adults with type 2 diabetes managing weight and seeking lean protein options, cod 1-2 times weekly is an affordable, low-calorie, versatile addition. See our broader diabetes diet guide for seafood selection.
Frequently Asked Questions
Is cod good for diabetes?
Cod is excellent for diabetes meal planning. A 3-oz serving provides 20 g of high-quality protein with essentially zero carbohydrate and only 89 calories — among the leanest protein sources available. Cod produces no glucose response. The omega-3 content is modest (about 0.2 g per 3 oz) compared with salmon or sardines, but cod compensates with very low fat content and versatile mild flavor.
What's the difference between Atlantic and Pacific cod?
Atlantic cod and Pacific cod are different species (Gadus morhua and Gadus macrocephalus). Nutritionally they are nearly identical. The main difference is sustainability — Atlantic cod populations have been historically overfished and some stocks are still recovering; Pacific cod is generally rated more sustainable. For US consumers, Alaskan Pacific cod and well-managed Atlantic cod (Iceland, Norway) are good choices. Check Monterey Bay Aquarium Seafood Watch for current ratings.
Is fish and chips okay for diabetes?
Traditional British fish and chips uses cod (typically) battered and deep-fried with fried potatoes. A typical restaurant serving delivers 800-1200 calories, 70-100 g carbohydrate (from batter, fries, and sometimes mushy peas), and 35-50 g fat. This is not diabetes-friendly. Better options: grilled, baked, or pan-fried cod (without batter) with a small portion of fries or alternative side. Cod fish tacos with corn tortillas are a diabetes-friendlier alternative.
How should I cook cod?
Cod is versatile and forgiving. Best methods: baked (400°F for 15 min with olive oil, lemon, herbs), pan-fried in olive oil, broiled, grilled, or poached in seasoned broth. Cod is delicate — don't overcook (becomes dry and flaky). Pair with non-starchy vegetables (broccoli, green beans, asparagus) and lemon. The mild flavor works with many seasonings — Mediterranean herbs, Cajun spices, Asian flavors, or simple lemon and butter.
Sources
American Diabetes Association. Nutrition Therapy for Adults With Diabetes or Prediabetes — A Consensus Report. Diabetes Care 2019.
Monterey Bay Aquarium Seafood Watch — cod sustainability ratings.
U.S. Department of Agriculture, FoodData Central. Fish, cod, Atlantic, cooked.
How tilapia fits into a diabetes meal plan — the affordable lean protein, the sourcing concerns around imported farmed varieties, and the omega-6 question.
How green beans fit into a diabetes meal plan — among the lowest-carb vegetables, the green-bean-casserole sodium trap, and the easiest weeknight side.
