Interactive Comparison Tool

Fish vs Chicken Nutrition Comparison

Q: Is fish healthier than chicken?

It depends on your health goal. Fish provides significantly more omega-3 fatty acids for heart and brain health. Chicken breast is leaner and provides slightly more protein per calorie, ideal for muscle gain and weight loss.

Q: Which has more protein: fish or chicken?

Grilled chicken breast contains about 31 g of protein per 100 g versus 20–25 g for most fish. Tuna rivals chicken breast with 23–30 g protein per 100 g.

Q: Is fish better than chicken for weight loss?

Both are excellent. White fish like cod and tilapia are extremely low-calorie (80–100 kcal per 100 g). Skinless chicken breast is also low at ~120 kcal. The best choice depends on your cooking method and overall plan.

Q: Why is fish better for heart health?

Fish contains EPA and DHA omega-3 fatty acids that reduce triglycerides, lower blood pressure, and decrease the risk of cardiac events. The American Heart Association recommends eating fish at least twice per week.

Q: Can I eat fish and chicken on a keto diet?

Yes, both are keto-friendly with zero carbohydrates. Fatty fish like salmon or mackerel are especially good since they provide healthy fats to meet your daily fat macro.

Compare fish and chicken side-by-side. See which is better for weight loss, muscle gain, heart health, and overall nutrition — backed by USDA data.

Quick Presets

Select Fish

🟢 Low Mercury

Select Chicken

Serving Size

Cooking MethodRaw

Atlantic Salmon and Chicken Breast (Skinless) are evenly matched across 8 metrics — it comes down to your health goal.

Fish Wins

Chicken Wins

Protein Efficiency Score

g protein / 100 kcal

9.8g

Atlantic Salmon

18.8g

Chicken Breast (Skinless)

More Efficient

Nutrient-by-Nutrient Breakdown

Calories

kcal per serving

Chicken Wins

Atlantic Salmon208.0 kcal(10% DV)

Chicken Breast (Skinless)120.0 kcal(6% DV)

Protein

g per serving

Chicken Wins

Atlantic Salmon20.4 g(41% DV)

Chicken Breast (Skinless)22.5 g(45% DV)

Total Fat

g per serving

Chicken Wins

Atlantic Salmon13.4 g(17% DV)

Chicken Breast (Skinless)2.60 g(3% DV)

Omega-3

g per serving

Fish Wins

Atlantic Salmon2.26 g(141% DV)

Chicken Breast (Skinless)0.02 g(1% DV)

Cholesterol

mg per serving

Fish Wins

Atlantic Salmon55.0 mg(18% DV)

Chicken Breast (Skinless)73.0 mg(24% DV)

Iron

mg per serving

Chicken Wins

Atlantic Salmon0.30 mg(2% DV)

Chicken Breast (Skinless)0.40 mg(2% DV)

Vitamin B12

mcg per serving

Fish Wins

Atlantic Salmon3.20 mcg(133% DV)

Chicken Breast (Skinless)0.20 mcg(8% DV)

Selenium

mcg per serving

Fish Wins

Atlantic Salmon36.5 mcg(66% DV)

Chicken Breast (Skinless)27.6 mcg(50% DV)

Health Goal Mode

Select your dietary goal and we'll recommend the best protein source based on the current comparison.

Fish vs Chicken for Weight Loss: Which Burns More Fat?

When comparing fish and chicken for weight loss, the calorie and protein density of each protein source matters most. Skinless chicken breast provides approximately 120 kcal and 22.5 g protein per 100 g — one of the leanest animal proteins available. Meanwhile, white fish like cod and tilapia can be even leaner, with 80–100 kcal per 100 g.

The advantage of fish for weight loss goes beyond calories. Omega-3 fatty acids found in salmon and mackerel have been shown in clinical studies to improve insulin sensitivity and promote fat oxidation, giving fish an edge in metabolic health. However, for strict calorie counting, chicken breast remains the gold standard due to its exceptional protein-to-calorie ratio.

Protein Showdown: Fish vs Chicken for Muscle Building

Bodybuilders and athletes have long debated whether fish or chicken is better for muscle growth. Grilled chicken breast leads with about 31 g of protein per 100 g, making it the default choice in meal-prep culture. Tuna comes close at 23–30 g, and salmon provides 20 g along with powerful anti-inflammatory omega-3s that accelerate recovery.

Research published in the Journal of the International Society of Sports Nutrition suggests that the anti-inflammatory properties of EPA and DHA in fish can reduce delayed-onset muscle soreness (DOMS) by up to 15%. For athletes training at high frequency, incorporating both fish and chicken creates an optimal protein rotation strategy.

Omega-3 Content: Why Fish Dominates Chicken

This is where fish wins decisively. Atlantic salmon provides 2.26 g of omega-3 fatty acids per 100 g, compared to just 0.02–0.08 g in chicken. These long-chain EPA and DHA fats are essential for cardiovascular health, brain function, and reducing systemic inflammation.

The American Heart Association recommends consuming at least two servings of fatty fish per week to meet the minimum 250–500 mg EPA+DHA target. Chicken, regardless of cut or preparation, cannot contribute meaningfully to this target. If your primary health concern is heart disease prevention, fish is the clear winner.

Mercury, Cholesterol & Safety: What You Need to Know

A common concern with fish consumption is mercury contamination. However, the most popular fish species — salmon, tilapia, cod, and sardines — are classified as low-mercury by the FDA. Larger predatory fish like swordfish, shark, and king mackerel should be limited to occasional consumption.

Regarding cholesterol, chicken thigh and leg contain 93–98 mg per 100 g, while most fish species contain 45–75 mg. Current evidence suggests that dietary cholesterol has a modest effect on blood cholesterol for most people, but individuals with hyperlipidemia should consult their physician.

Which Should You Eat More? Expert Recommendations

The consensus from nutrition science is clear: eat both. The ideal diet includes a variety of protein sources. The USDA Dietary Guidelines recommend 8+ ounces of seafood per week for adults, alongside lean poultry.

A practical strategy is to use chicken breast as your everyday lean protein (meal prep, salads, stir-fry) and incorporate fatty fish like salmon or sardines 2–3 times per week for their unique omega-3 benefits. This combination optimizes protein intake, heart health, and dietary variety.

Frequently Asked Questions

Is fish healthier than chicken?

It depends on your health goal. Fish — especially fatty fish like salmon — provides significantly more omega-3 fatty acids, which support heart and brain health. Chicken breast is leaner and provides slightly more protein per calorie, making it ideal for muscle gain and weight loss.

Which has more protein: fish or chicken?

Grilled chicken breast typically contains about 31 g of protein per 100 g versus 20–25 g for most fish. However, tuna rivals chicken breast with 23–30 g protein per 100 g depending on the species.

Is fish better than chicken for weight loss?

Both are excellent for weight loss. Most white fish (cod, tilapia) is extremely low-calorie at around 80–100 kcal per 100 g. Skinless chicken breast is also low at ~120 kcal. The best choice depends on your cooking method and overall meal plan.

Why is fish better for heart health?

Fish contains EPA and DHA omega-3 fatty acids that actively reduce triglycerides, lower blood pressure, and decrease the risk of cardiac events. Chicken contains virtually no omega-3s. The American Heart Association recommends eating fish at least twice per week.

Can I eat fish and chicken on a keto diet?

Yes, both are keto-friendly as they contain zero carbohydrates. Fatty fish like salmon or mackerel are especially good for keto since they provide healthy fats that help you meet your daily fat macro.

Which is safer to eat regularly: fish or chicken?

Both are safe when cooked properly. The main concern with fish is mercury — large predatory fish like swordfish or king mackerel should be limited. Most commonly eaten fish like salmon, tilapia, and cod are low in mercury and safe for regular consumption.

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