Food · Meat & Seafood · 鱼
Salmon
EPA/DHA omega-3 的旗舰来源 · 少有的天然维生素 D 食物 · 低汞最佳选择· 吃整条鱼 ≠ 吃鱼油
Story path
- 1Salmon · not one fish, but a familySalmon · not one fish, but a family
- 2Macros · a high-protein fatty fishMacros · a high-protein fatty fish
- 3Fat structure · EPA / DHA are the headlineFat structure · EPA / DHA are the headline
- 4Highlights · a rare natural vitamin D sourceHighlights · a rare natural vitamin D source
- 5What's missing · how to pairWhat's missing · how to pair
- 6Key knowledge · farmed vs wild · mercuryKey knowledge · farmed vs wild · mercury
- 7How to choose · cook · how muchHow to choose · cook · how much
Chapter 1
Salmon · not one fish, but a family
Salmon · not one fish, but a family
'Salmon' is a market name, not one biological species. It spans Atlantic salmon (>90% of the market is farmed) and several wild Pacific species — king, sockeye, coho, pink, chum.
The differences aren't just naming. Fat content, omega-3 level, flesh color, and price all track species and the farmed-vs-wild split. Farmed Atlantic salmon can carry 2-3× the fat of wild pink salmon, so the nutrition panel varies a lot under one label.
The orange-red flesh comes from a carotenoid called astaxanthin — wild fish accumulate it from krill, farmed fish get it from feed.
One thing up front: salmon sold for raw eating is often Atlantic salmon or rainbow trout, not wild Pacific salmon — which matters for whether it can be eaten raw.
The differences aren't just naming. Fat content, omega-3 level, flesh color, and price all track species and the farmed-vs-wild split. Farmed Atlantic salmon can carry 2-3× the fat of wild pink salmon, so the nutrition panel varies a lot under one label.
The orange-red flesh comes from a carotenoid called astaxanthin — wild fish accumulate it from krill, farmed fish get it from feed.
One thing up front: salmon sold for raw eating is often Atlantic salmon or rainbow trout, not wild Pacific salmon — which matters for whether it can be eaten raw.
Chapter 2
Macros · a high-protein fatty fish
Macros · a high-protein fatty fish
Per 100 g of cooked farmed Atlantic salmon: roughly protein 22-25 g, fat 12-13 g, carbs 0 g, energy ~200-210 kcal. It's a 'fatty fish' — a different category from lean white fish like cod (<1 g fat per 100 g).
Protein is straightforward: salmon is a complete protein with all nine essential amino acids and high digestibility, on par with lean beef or chicken breast (dive: protein).
What makes salmon interesting is that 12-13 g of fat — not a burden but the point. The next scene unpacks it.
Everyday portions: a typical fillet ≈ 150-180 g; a 6-piece sashimi serving ≈ 90-100 g. A single fillet delivers 35 g+ protein and 2-3 g EPA + DHA — already above most supplements' daily dose.
Protein is straightforward: salmon is a complete protein with all nine essential amino acids and high digestibility, on par with lean beef or chicken breast (dive: protein).
What makes salmon interesting is that 12-13 g of fat — not a burden but the point. The next scene unpacks it.
Everyday portions: a typical fillet ≈ 150-180 g; a 6-piece sashimi serving ≈ 90-100 g. A single fillet delivers 35 g+ protein and 2-3 g EPA + DHA — already above most supplements' daily dose.
Chapter 3
Fat structure · EPA / DHA are the headline
Fat structure · EPA / DHA are the headline
Salmon earns its own story almost entirely on this fat. Of its 12-13 g, saturated fat is the minority (~2-3 g); most is unsaturated, and the prize is long-chain omega-3 — EPA and DHA.
Per 100 g, farmed Atlantic salmon holds ~1.8-2.5 g EPA + DHA, among the highest natural-food concentrations. EPA is an anti-inflammatory messenger; DHA is membrane material, heavily enriched in retina and brain gray matter (dive: fats-omega-3).
Crucial distinction: eating fish vs taking fish oil. The Cochrane 2020 review (>80,000 people) largely overturned the cardiovascular benefit of omega-3 supplements (high-certainty, little or no effect) — but that's omega-3 from capsules, not whole fish. Eating fish brings far more: complete protein, vitamin D, selenium, B12, plus the benefit of displacing red meat. This food-matrix effect can't be replicated by a pill (dive: fish-oil).
Cholesterol note: salmon carries ~60-70 mg per 100 g, with limited impact on most people's blood lipids.
Per 100 g, farmed Atlantic salmon holds ~1.8-2.5 g EPA + DHA, among the highest natural-food concentrations. EPA is an anti-inflammatory messenger; DHA is membrane material, heavily enriched in retina and brain gray matter (dive: fats-omega-3).
Crucial distinction: eating fish vs taking fish oil. The Cochrane 2020 review (>80,000 people) largely overturned the cardiovascular benefit of omega-3 supplements (high-certainty, little or no effect) — but that's omega-3 from capsules, not whole fish. Eating fish brings far more: complete protein, vitamin D, selenium, B12, plus the benefit of displacing red meat. This food-matrix effect can't be replicated by a pill (dive: fish-oil).
Cholesterol note: salmon carries ~60-70 mg per 100 g, with limited impact on most people's blood lipids.
Chapter 4
Highlights · a rare natural vitamin D source
Highlights · a rare natural vitamin D source
Salmon's micronutrient highlights are concentrated:
Vitamin D is the headline. Few natural foods supply meaningful vitamin D; fatty fish is one. Per 100 g, farmed Atlantic salmon holds ~250-650 IU (wild usually higher) — a rare food source for people with low winter sun (dive: vitamin-d).
EPA + DHA (prior scene) is the signature (dive: fats-omega-3).
The rest aren't minor:
Vitamin B12: up to 2.5-3 μg per 100 g, easily covering a day's need (dive: vitamin-b12)Selenium: marine fish are a good source, feeding antioxidant enzymes (dive: selenium)Complete protein: see protein
Its selenium is worth a note — selenium binds mercury, which can theoretically offset some trace mercury in fish, but don't treat it as a license to ignore mercury. In short: salmon is one of the few natural foods delivering quality protein + vitamin D + omega-3 + B12 + selenium together.
Vitamin D is the headline. Few natural foods supply meaningful vitamin D; fatty fish is one. Per 100 g, farmed Atlantic salmon holds ~250-650 IU (wild usually higher) — a rare food source for people with low winter sun (dive: vitamin-d).
EPA + DHA (prior scene) is the signature (dive: fats-omega-3).
The rest aren't minor:
Vitamin B12: up to 2.5-3 μg per 100 g, easily covering a day's need (dive: vitamin-b12)Selenium: marine fish are a good source, feeding antioxidant enzymes (dive: selenium)Complete protein: see protein
Its selenium is worth a note — selenium binds mercury, which can theoretically offset some trace mercury in fish, but don't treat it as a license to ignore mercury. In short: salmon is one of the few natural foods delivering quality protein + vitamin D + omega-3 + B12 + selenium together.
Chapter 5
What's missing · how to pair
What's missing · how to pair
Salmon is well-rounded but isn't a whole meal.
It has almost no fiber, vitamin C, or most plant polyphenols — those come from vegetables and fruit. Pairing salmon with dark greens, cruciferous, or colorful veg adds fiber and vitamin C and broadens the antioxidant range.
Carbs are also zero. If the meal must fuel exercise, add whole grains or tubers.
Iron has a common misconception: salmon isn't iron-rich, far below red meat. Don't rely on it for iron (dive: iron).
Calcium is essentially absent — unless you eat bone-in canned salmon.
Two practical pairing points:
Salmon's omega-3 is polyunsaturated and vulnerable to prolonged high heat and reheating (oxidation). Low-temp cooking preserves it bestA squeeze of vitamin-C-rich food (lemon, bell pepper) isn't just flavor — it aids non-heme iron uptake
It has almost no fiber, vitamin C, or most plant polyphenols — those come from vegetables and fruit. Pairing salmon with dark greens, cruciferous, or colorful veg adds fiber and vitamin C and broadens the antioxidant range.
Carbs are also zero. If the meal must fuel exercise, add whole grains or tubers.
Iron has a common misconception: salmon isn't iron-rich, far below red meat. Don't rely on it for iron (dive: iron).
Calcium is essentially absent — unless you eat bone-in canned salmon.
Two practical pairing points:
Salmon's omega-3 is polyunsaturated and vulnerable to prolonged high heat and reheating (oxidation). Low-temp cooking preserves it bestA squeeze of vitamin-C-rich food (lemon, bell pepper) isn't just flavor — it aids non-heme iron uptake
Chapter 6
Key knowledge · farmed vs wild · mercury
Key knowledge · farmed vs wild · mercury
This is salmon's most important scene, because 'farmed vs wild' gets spun both ways.
A reassuring fact first: in the FDA-EPA 2022 fish advice, salmon sits in the safest 'Best Choices' tier — a low-mercury fish that pregnant women and children are encouraged to eat 2-3 servings/week. Salmon is short-lived and low on the food chain, unlike shark or swordfish that biomagnify methylmercury at the top.
Farmed vs wild — real differences (don't reduce it to 'wild is always better'):
Contaminants (PCB / dioxins): interestingly, studies like Lundebye 2017 found wild Atlantic salmon ran HIGHER in PCBs, dioxins, and mercury than farmed; over the past decade farmed feed shifted toward more plant oil, dropping theseFat and omega-3: farmed has more total fat, so absolute EPA + DHA per fish is often not lower; but wild has a higher DHA shareColor: wild's orange-red comes from natural astaxanthin, farmed gets added astaxanthin; color depth doesn't directly equal nutrition (dive: astaxanthin)
Practical takeaway: wild and farmed each have trade-offs — not black and white. Choosing a reputable, clearly-sourced, fresh fish matters more. Mercury is basically a non-issue for salmon.
A reassuring fact first: in the FDA-EPA 2022 fish advice, salmon sits in the safest 'Best Choices' tier — a low-mercury fish that pregnant women and children are encouraged to eat 2-3 servings/week. Salmon is short-lived and low on the food chain, unlike shark or swordfish that biomagnify methylmercury at the top.
Farmed vs wild — real differences (don't reduce it to 'wild is always better'):
Contaminants (PCB / dioxins): interestingly, studies like Lundebye 2017 found wild Atlantic salmon ran HIGHER in PCBs, dioxins, and mercury than farmed; over the past decade farmed feed shifted toward more plant oil, dropping theseFat and omega-3: farmed has more total fat, so absolute EPA + DHA per fish is often not lower; but wild has a higher DHA shareColor: wild's orange-red comes from natural astaxanthin, farmed gets added astaxanthin; color depth doesn't directly equal nutrition (dive: astaxanthin)
Practical takeaway: wild and farmed each have trade-offs — not black and white. Choosing a reputable, clearly-sourced, fresh fish matters more. Mercury is basically a non-issue for salmon.
Chapter 7
How to choose · cook · how much
How to choose · cook · how much
How much: for most adults, 2-3 fatty-fish servings/week (~100-150 g each) supply ample EPA + DHA with no need for fish oil. Pregnancy and lactation: same amount, since DHA is critical for fetal brain and visual development.
How to choose: freshness by eye and smell — springy, non-slimy flesh, a faint sea smell. Canned salmon (especially bone-in red salmon) is underrated — cheap, long-keeping, and the soft bones add calcium. 'Wild' labeling doesn't guarantee better.
How to cook — method decides whether that good fat survives:
Steaming, low-temp baking, light searing best protect omega-3; PUFAs dislike prolonged high heatDon't cook salmon dry and well-done; a slightly pink center is better for texture and nutritionLemon, herbs, bell pepper add flavor and vitamin C
Raw eating warning: sashimi-grade salmon is usually frozen to kill parasites. Pregnant women, the immunocompromised, the elderly, and young children should eat it cooked.
This page is nutrition education, not a substitute for individualized advice from a physician or dietitian.
How to choose: freshness by eye and smell — springy, non-slimy flesh, a faint sea smell. Canned salmon (especially bone-in red salmon) is underrated — cheap, long-keeping, and the soft bones add calcium. 'Wild' labeling doesn't guarantee better.
How to cook — method decides whether that good fat survives:
Steaming, low-temp baking, light searing best protect omega-3; PUFAs dislike prolonged high heatDon't cook salmon dry and well-done; a slightly pink center is better for texture and nutritionLemon, herbs, bell pepper add flavor and vitamin C
Raw eating warning: sashimi-grade salmon is usually frozen to kill parasites. Pregnant women, the immunocompromised, the elderly, and young children should eat it cooked.
This page is nutrition education, not a substitute for individualized advice from a physician or dietitian.