The Health Benefits of Eating Crab Claws: Why This Seafood is Good for You
September 09, 2024The Health Benefits of Eating Crab: Nutrition, Omega-3s, and More
Crab is one of the most nutritionally dense seafood options available — high in protein, rich in omega-3 fatty acids, and packed with micronutrients that are difficult to get from other foods. It's also low in calories and saturated fat, making it an excellent choice for a health-conscious diet. This guide covers the specific nutritional profile of the three most popular crab species (king, snow, and Dungeness), the key health benefits, and how to incorporate crab into your diet.
🔗 Golden King Crab | 🔗 Snow Crab Legs | 🔗 Dungeness Crab Clusters
Crab Nutrition: By the Numbers
Per 3 oz (85g) cooked crab meat — approximate values across species:
| Nutrient | King Crab | Snow Crab | Dungeness Crab |
|---|---|---|---|
| Calories | ~82 | ~74 | ~94 |
| Protein | ~16g | ~15g | ~19g |
| Total fat | ~1.3g | ~1.0g | ~1.1g |
| Saturated fat | ~0.1g | ~0.1g | ~0.1g |
| Omega-3 (EPA+DHA) | ~350–450mg | ~300–400mg | ~300–400mg |
| Cholesterol | ~45mg | ~60mg | ~65mg |
| Sodium | ~911mg* | ~587mg | ~321mg |
| Vitamin B12 | ~9.8µg (408% DV) | ~3.5µg (146% DV) | ~8.6µg (358% DV) |
| Selenium | ~36µg (65% DV) | ~34µg (62% DV) | ~36µg (65% DV) |
| Zinc | ~6.5mg (59% DV) | ~3.0mg (27% DV) | ~4.7mg (43% DV) |
| Copper | ~0.6mg (67% DV) | ~0.4mg (44% DV) | ~0.6mg (67% DV) |
| Mercury | Low (0.06 ppm avg) | Low (0.008 ppm avg) | Low (0.065 ppm avg) |
*King crab is naturally higher in sodium due to its ocean habitat; Dungeness crab is the lowest-sodium option.
Key Health Benefits
High-Quality Protein with Very Low Fat
Crab delivers 15–19g of complete protein per 3 oz serving with less than 1.5g of total fat and virtually no saturated fat. This protein-to-calorie ratio is exceptional — crab provides more protein per calorie than chicken breast. For muscle building, weight management, and satiety, crab is one of the most efficient protein sources available.
Omega-3 Fatty Acids
Crab provides 300–450mg of EPA and DHA (the most bioavailable omega-3 forms) per 3 oz serving. The American Heart Association recommends at least 250–500mg of EPA+DHA per day for cardiovascular health — a single serving of crab meets or exceeds this threshold. Omega-3s reduce triglycerides, lower blood pressure, reduce inflammation, and support brain function and cognitive health.
Exceptional Vitamin B12 Content
Crab is one of the richest dietary sources of vitamin B12 — a single 3 oz serving of king crab provides over 400% of the daily value. B12 is essential for red blood cell formation, neurological function, and DNA synthesis. B12 deficiency is common (especially in older adults and vegetarians) and can cause fatigue, neurological symptoms, and anemia. Crab is one of the most efficient ways to meet B12 needs.
Selenium
Crab provides 60–65% of the daily value for selenium per 3 oz serving. Selenium is a powerful antioxidant that protects cells from oxidative damage, supports thyroid hormone metabolism, and plays a role in immune function. Most Americans are selenium-sufficient, but crab is an excellent source for those who are not.
Zinc
King crab is particularly high in zinc — 59% DV per 3 oz serving. Zinc is essential for immune function, wound healing, protein synthesis, and DNA replication. It's also important for taste and smell perception. Zinc deficiency is more common than most people realize, particularly in older adults.
Low Mercury
All three major crab species have very low mercury levels — well below the FDA's action level of 1 ppm. Snow crab is the lowest (0.008 ppm average); king and Dungeness crab are also very low (0.06–0.065 ppm). Crab is on the FDA's "Best Choices" list and is safe for pregnant women and children at 2–3 servings per week.
A Note on Cholesterol
Crab contains moderate dietary cholesterol (45–65mg per 3 oz serving). Current nutritional science — including the 2020–2025 Dietary Guidelines for Americans — no longer sets a specific daily limit for dietary cholesterol for most people, as research has shown that dietary cholesterol has a minimal effect on blood cholesterol levels for the majority of the population. The saturated fat content of a food is a more important predictor of cardiovascular risk than its cholesterol content — and crab is extremely low in saturated fat (0.1g per serving). For most people, crab's cholesterol content is not a health concern.
How to Incorporate Crab into Your Diet
- Steamed with garlic butter: The simplest preparation; retains all nutrients; serve with lemon wedges
- Crab salad: Toss crab meat with mixed greens, avocado, cherry tomatoes, and citrus vinaigrette for a high-protein, low-calorie meal
- Crab pasta: Toss crab meat with linguine, olive oil, garlic, white wine, and red pepper flakes; finish with lemon zest and parsley
- Crab chowder: A classic New England preparation; add crab meat in the last 2–3 minutes of cooking to prevent toughening
- Crab cakes: Mix crab meat with minimal binder (egg, a little breadcrumb, Dijon mustard, Old Bay); pan-sear in butter; serve with remoulade
Shop Crab
- 🔗 Alaskan Red King Crab Legs
- 🔗 Golden King Crab
- 🔗 Snow Crab Legs
- 🔗 Dungeness Crab Clusters
- 🔗 Whole Dungeness Crab
🎥 Watch crab cooking tutorials on the Global Seafoods YouTube Channel
FAQs: Crab Nutrition and Health
Is crab high in cholesterol, and should I be concerned?
Crab contains moderate dietary cholesterol (45–65mg per 3 oz serving — about 15–22% of the old 300mg daily limit). However, current nutritional science no longer sets a specific daily limit for dietary cholesterol for most people. The 2020–2025 Dietary Guidelines for Americans removed the 300mg cholesterol limit, reflecting research showing that dietary cholesterol has a minimal effect on blood cholesterol levels for the majority of the population. What matters more for cardiovascular risk is saturated fat intake — and crab is extremely low in saturated fat (0.1g per 3 oz serving). For most healthy adults, crab's cholesterol content is not a health concern. If you have familial hypercholesterolemia or have been specifically advised to limit dietary cholesterol by your doctor, consult your physician about appropriate intake.
How does crab compare to other protein sources nutritionally?
Crab is one of the most nutrient-dense protein sources available. Compared to chicken breast (3 oz cooked: ~140 cal, 26g protein, 3g fat): crab has fewer calories (~74–94 cal), similar protein (15–19g), and far less fat (1–1.3g). Crab also provides nutrients that chicken doesn't: significant omega-3s (300–450mg EPA+DHA vs. essentially zero in chicken), exceptional B12 (146–408% DV vs. ~5% DV in chicken), and high selenium and zinc. The main advantage of chicken: lower sodium and lower cost. For nutritional density per calorie, crab is superior to most common protein sources.
How often should I eat crab for health benefits?
The FDA and EPA recommend eating 2–3 servings (8–12 oz) of low-mercury seafood per week for adults, and 2 servings per week for pregnant women and children. All three major crab species (king, snow, Dungeness) are on the FDA's "Best Choices" list (lowest mercury category), making them safe to eat at the recommended 2–3 servings per week frequency. One 3 oz serving of crab provides a full day's omega-3 requirement (EPA+DHA), over 100% of the daily B12 requirement (for king and Dungeness), and significant selenium and zinc. Eating crab 1–2 times per week is a practical and nutritionally meaningful frequency for most people.