Fish contains roughly 0.2 to 0.5 grams of creatine per serving, depending on the species. That puts it in the same range as red meat and, by some measures, ahead of beef, pork, and chicken. Herring sits at the top, packing 6.5 to 10 grams of creatine per kilogram of raw flesh, while leaner or less active species fall toward the lower end.
Creatine Levels by Fish Species
Herring is the standout. FDA data on herring muscle tissue shows 350 to 420 milligrams per 100 grams, which translates to about 3.5 to 4.2 grams per kilogram. Other analyses put the range even higher, at 6.5 to 10 grams per kilogram. Either way, herring consistently ranks as one of the richest natural food sources of creatine available.
Salmon and tuna fall in the middle of the pack. A typical serving of salmon or tuna delivers around 0.3 to 0.5 grams of creatine. Cod and other whitefish tend toward the lower end, closer to 0.2 grams per serving. The general pattern: fattier, more active fish store more creatine in their muscles than leaner, slower-moving species.
Why Fish Store Creatine
Creatine exists in fish muscle for the same reason it exists in yours. It recycles the molecule your cells use as immediate fuel (ATP), keeping muscles supplied with quick energy during bursts of activity. Fish that swim constantly or migrate long distances have higher energy demands, and their muscles reflect that with greater creatine stores. Creatine also plays a role in helping fish regulate their internal salt balance when moving between waters of different salinity, which may partly explain why ocean-dwelling species like herring are especially rich in it.
How Fish Compares to Other Meats
A 4-ounce serving of beef provides about 0.5 grams of creatine. Pork ranges from 0.5 to 1 gram per serving. Lamb varies widely, from 0.3 to 1.3 grams per 4 ounces. A 6-ounce chicken breast contains only about 0.3 grams.
Fish, at 0.2 to 0.5 grams per serving, overlaps with all of these. Choose herring or salmon and you’re matching or beating beef. Choose a mild whitefish like cod, and you’re closer to chicken. The species matters more than the category.
- Herring: 0.4–0.5 g per serving (highest among common fish)
- Salmon: ~0.4 g per serving
- Tuna: ~0.3–0.4 g per serving
- Cod: ~0.2–0.3 g per serving
- Beef (for comparison): ~0.5 g per 4 oz
- Chicken breast (for comparison): ~0.3 g per 6 oz
How Much Creatine Survives Cooking
You lose some creatine every time you apply heat. Research on cod fillets found that baking retains the most creatine, about 78% of what was in the raw fish. Frying comes in slightly lower, and boiling is the worst, preserving only about 68%. If you brine the fish before cooking, that alone strips out roughly 16% of the creatine before any heat is applied, because creatine is water-soluble and leaches into the liquid.
So a serving of baked salmon that starts with 0.4 grams of creatine in its raw state delivers roughly 0.3 grams to your plate. Boiling that same piece and discarding the water could drop you closer to 0.25 grams. The differences between baking, frying, and boiling aren’t dramatic, but they do add up if fish is your primary creatine source.
Can You Get a Full Dose From Fish Alone?
The standard supplemental dose of creatine is 3 to 5 grams per day. To hit 5 grams from fish, you’d need to eat roughly 2.5 pounds of raw salmon or about 3 pounds of raw tuna in a single day. That’s not realistic for most people, and cooking losses push the number even higher.
Your body does produce about 1 to 2 grams of creatine on its own each day, synthesized in the liver and kidneys. A normal mixed diet adds another 1 to 2 grams. So eating a serving or two of fish daily contributes meaningfully to your baseline creatine levels, but it won’t replicate the effect of supplementation. People who eat fish regularly still carry lower muscle creatine stores than people taking 3 to 5 grams of creatine monohydrate daily.
That said, fish delivers creatine alongside protein, omega-3 fats, and other nutrients that a powder can’t match. If your goal is general health rather than maxing out muscle creatine saturation, a few servings of fatty fish per week is a strong dietary choice on its own terms.