Crab vs. Lobster: Which is Healthier?

June 15, 2026

Crab vs. Lobster: Which Is Healthier?

Crab and lobster are two of the most celebrated seafood options in the world — both delicious, both nutritious, and both surprisingly low in calories. But when it comes to health, they're not identical. This guide breaks down the key nutritional differences so you can make the best choice for your diet and health goals.

Nutritional Comparison (Per 3 oz / 85g Cooked Serving)

Nutrient	Crab (Dungeness)	Lobster
Calories	94 kcal	83 kcal
Protein	19g	17g
Total Fat	1.1g	0.9g
Omega-3 Fatty Acids	400–500mg ✅	100–200mg
Vitamin B12	30% DV	47% DV ✅
Selenium	50% DV	55% DV
Zinc	26% DV ✅	10% DV
Copper	14% DV	35% DV ✅
Vitamin E	Low	Moderate ✅
Cholesterol	65mg	61mg

Health Benefits of Crab

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• High in omega-3 fatty acids — Crab contains significantly more omega-3s than lobster, supporting heart health, brain function, and reducing inflammation.
• Excellent source of zinc — Important for immune function, wound healing, and hormone regulation.
• Rich in selenium — A powerful antioxidant that protects cells from oxidative damage and supports thyroid function.
• High-quality protein — 19g per serving with all essential amino acids.
• Low in calories and fat — Ideal for weight management and lean muscle support.

Health Benefits of Lobster

• Highest in Vitamin B12 — 47% of daily value per serving, essential for nerve health, red blood cell production, and energy metabolism.
• Rich in copper — Supports iron absorption, collagen production, and cardiovascular health.
• High selenium content — On par with crab for antioxidant protection.
• Slightly lower in calories — 83 calories vs. 94 for crab per 3 oz serving.
• Good source of vitamin E — An antioxidant that supports skin health and immune function.

Which Is Healthier: Crab or Lobster?

The honest answer: both are excellent choices. Here's how to decide based on your goals:

• Choose crab if: You want more omega-3s, zinc, or are focused on heart and brain health.
• Choose lobster if: You want more B12, copper, or are focused on energy metabolism and immune support.
• For weight loss: Both are low in calories and fat — either works well.
• For muscle building: Crab edges ahead with slightly more protein per serving.

Are Crab and Lobster High in Cholesterol?

Both crab and lobster contain moderate dietary cholesterol (60–65mg per serving), but they are very low in saturated fat — the type of fat that actually raises blood cholesterol levels. Current dietary guidelines indicate that dietary cholesterol from lean seafood has minimal impact on blood cholesterol for most people. Both are considered heart-healthy choices.

Are Crab and Lobster Safe During Pregnancy?

Yes — both crab and lobster are safe to eat during pregnancy when fully cooked. They are low in mercury compared to larger fish like swordfish or king mackerel, and their high protein and B12 content make them beneficial during pregnancy. The FDA recommends 2–3 servings of low-mercury seafood per week for pregnant women.

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Conclusion

Crab and lobster are both outstanding choices for a healthy, protein-rich diet. Crab wins on omega-3s and zinc; lobster leads on B12 and copper. Either way, you can't go wrong — both are low in calories, high in nutrients, and absolutely delicious. Shop our wild-caught seafood collection and enjoy restaurant-quality crab delivered to your door.

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FAQ: Crab vs. Lobster Nutrition

Q1: Is crab or lobster better for weight loss?

Both are excellent for weight loss — low in calories (83–94 kcal per 3 oz), very low in fat, and high in protein. Crab has slightly more protein (19g vs. 17g), which supports satiety and reduces overall caloric intake. For strict calorie counting, lobster is marginally lower. In practice, the difference is negligible — preparation method matters far more. Steamed or boiled with light seasoning keeps both under 150 calories per serving; heavy butter sauces can triple that.

Q2: Which has more omega-3s — crab or lobster?

Crab has significantly more omega-3 fatty acids — 400–500mg per 3 oz serving compared to lobster's 100–200mg. This makes crab the clear winner for heart health, anti-inflammatory benefits, and brain function. If omega-3 intake is a priority, crab (especially Dungeness or King Crab) is the better choice. For maximum omega-3s among seafood, salmon (1,500–2,000mg per serving) and mackerel are even higher, but crab is a solid mid-range option.

Q3: Is lobster or crab higher in protein?

Crab is slightly higher in protein — approximately 19g vs. 17g per 3 oz serving. Both are complete proteins containing all essential amino acids. For muscle building and recovery, either is an excellent choice. The 2g difference per serving is not significant enough to be a deciding factor — choose based on flavor preference and availability.

Q4: Can I eat crab or lobster every week?

Yes — both are low-mercury seafoods and can be enjoyed 2–3 times per week as part of a balanced diet, per FDA guidelines. Neither crab nor lobster appears on the FDA's list of high-mercury fish to limit. They are safe for most adults, including pregnant women (when fully cooked), at the recommended 2–3 servings per week. Variety is always beneficial — rotate with other seafood like salmon, halibut, and shrimp for the broadest nutritional coverage.

Q5: Which is more sustainable — crab or lobster?

It depends on the source. U.S. West Coast Dungeness Crab and Alaskan King Crab are consistently rated as sustainable choices by Seafood Watch, managed under strict quotas. American Lobster (Maine/Atlantic) is also generally well-managed, though some concerns exist around fishing gear and whale entanglement. Both are far more sustainable than many farmed or imported alternatives. Always look for MSC-certified or Seafood Watch-rated products when purchasing.

Q6: Does cooking method affect the nutritional value of crab or lobster?

Yes — the protein, omega-3, and micronutrient content remain largely stable across cooking methods, but added ingredients significantly change the caloric and fat profile. Steaming or boiling preserves the most nutrients and keeps calories lowest. Grilling adds minimal calories. Baking in butter adds ~100–200 calories per serving depending on quantity. Deep-frying or heavy cream sauces can add 300–500+ calories. For maximum nutritional benefit, steam or boil and serve with lemon juice rather than heavy butter sauces.

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