Steak has more protein than salmon. A 100-gram serving of cooked beef sirloin delivers about 29 grams of protein, while the same amount of cooked salmon provides around 25 grams. That’s a meaningful difference if you’re tracking intake closely, but both are excellent protein sources that outperform most other foods.
Protein Per Serving, Side by Side
For a typical 100-gram (3.5-ounce) cooked portion, beef sirloin gives you 29 grams of protein at 217 calories. Salmon comes in at 25 grams of protein and 208 calories. So steak wins on raw protein content, but salmon is slightly more protein-dense relative to its calories. You get about 13.4 grams of protein per 100 calories from beef sirloin versus about 12 grams per 100 calories from salmon.
The gap widens or narrows depending on the cut and species. Leaner beef cuts like top round can push past 30 grams of protein per 100 grams cooked, while fattier cuts like ribeye drop closer to 26 grams because more of the weight comes from fat. On the salmon side, wild coho and sockeye tend to be leaner and slightly higher in protein than farmed Atlantic salmon, which carries more fat.
Leucine and Muscle-Building Quality
Protein quantity is only part of the picture. The amino acid leucine is the primary trigger for muscle protein synthesis, and beef contains significantly more of it. A 3-ounce serving of cooked beef sirloin provides roughly 2.4 to 2.6 grams of leucine. The same portion of cooked wild coho salmon delivers about 1.9 grams, and other salmon varieties fall lower, around 1.5 to 1.8 grams.
That matters if your goal is building or maintaining muscle. The commonly cited threshold for maximally stimulating muscle repair is about 2.5 grams of leucine per meal. A single serving of steak gets you there; salmon typically falls short unless you eat a larger portion. Both steak and salmon are complete proteins containing all nine essential amino acids, and both score well on protein quality scales. But for pure muscle-building efficiency per bite, steak has a clear edge.
What Each One Offers Beyond Protein
Choosing between steak and salmon based on protein alone misses the bigger nutritional story, because their micronutrient profiles are almost complementary.
Beef is one of the best dietary sources of iron, zinc, and vitamin B12. Per 100 grams, steak provides about 2 mg of iron (the highly absorbable heme form), 4.7 mg of zinc, and 2.2 micrograms of B12. Iron supports oxygen transport in your blood, zinc plays a role in immune function and wound healing, and B12 is essential for nerve health and red blood cell production.
Salmon’s signature nutrients are omega-3 fatty acids and vitamin D. A 100-gram serving of fish delivers roughly 0.8 grams of combined EPA and DHA, the two omega-3s most strongly linked to heart and brain health. It also provides about 4 micrograms of vitamin D, a nutrient that’s hard to get from food and that many people run low on, especially in northern climates. You won’t find meaningful amounts of omega-3s or vitamin D in a steak.
Satiety and Weight Management
If you’re eating for weight loss, the calorie difference between the two is small (217 versus 208 per 100 grams), so neither has a dramatic advantage there. But an interesting finding from a study comparing fish and beef protein meals in men of normal weight showed that participants who ate a fish-based lunch consumed about 11% fewer calories at dinner, even though they didn’t report feeling more or less full than the beef group. The ratings for hunger and satiety during the afternoon were similar between the two meals, yet the fish group naturally ate roughly 315 fewer kilojoules (about 75 fewer calories) at the next meal without compensating later in the evening.
That doesn’t mean salmon is definitively better for appetite control. The difference in subjective hunger wasn’t statistically significant, and one study isn’t a verdict. But it suggests that fish protein may subtly influence how much you eat afterward, which could add up over time.
How to Think About the Choice
If your primary goal is maximizing protein and leucine intake per serving, steak is the better pick. It delivers more of both in every bite, making it especially practical if you’re trying to hit protein targets for muscle gain or preservation.
If you’re optimizing for overall nutrient balance, the smarter move is eating both regularly rather than choosing one exclusively. Steak covers iron, zinc, and B12. Salmon covers omega-3s and vitamin D. These are nutrients that many adults fall short on, and alternating between the two throughout the week fills gaps that eating only one of them would leave open.
For people watching calories closely, salmon offers a slightly better protein-to-calorie ratio and may help with portion control at the next meal. For people focused on post-workout recovery or hitting a leucine threshold, steak gets the job done more efficiently. In practice, the 4-gram protein difference per serving is easy to close with a small side of Greek yogurt or a handful of edamame, so the “better” choice really comes down to which additional nutrients your diet needs most.