Use in Moderation
Mussels
6.30g net carbs per 3 oz
Those 6.3 g of net carbs in a 3 oz serving are higher than most shellfish, so mussels need a spot in your daily count rather than a free pass. The 20.2 g of protein is a real plus, but keep portions modest if you want room for other carbs that day.
Built by Barron Hansen · Last updated July 2026
Nutrition Facts
Fits My Daily Budget?
Set your daily net carb limit to see how one serving fits.
One serving uses 32% of your 20g daily budget.
Plan the rest of your day
Good to Know
Shellfish like these store carbs as glycogen, which is why they read higher than a comparable piece of fish. Skip the classic restaurant preparations: moules mariniere and steamed-in-white-wine versions often add sugar, flour-thickened broth, or crusty bread for dipping that quickly stacks the carbs. If you buy them canned or jarred, check the label for sauces packed in tomato or escabeche, since those can add 3 to 5 g of carbs on top of the mussels themselves.
Is Mussels Keto? The Full Answer
Mussels contains 6.30g net carbs per 3 oz (6.30g total carbs minus 0.00g fiber). Those 6.3 g of net carbs in a 3 oz serving are higher than most shellfish, so mussels need a spot in your daily count rather than a free pass. The 20.2 g of protein is a real plus, but keep portions modest if you want room for other carbs that day.
On a standard ketogenic diet, most people target 20-25g net carbs per day. A single serving uses 32% of a 20g daily carb limit. Track your portions carefully and account for other carbs in your meals.
Better Keto Swaps
Mussels are leaner protein than most shellfish, but those 6.3 g of net carbs per 3 oz add up fast on keto. Here are a few swaps that keep the seafood flavor with far less. Shrimp comes in at roughly 0 g net carbs for 3 oz, cooks in minutes, and works in butter, garlic, or a quick stir-fry. Wild salmon is another solid pick at about 0 g net carbs per 3 oz, plus it brings more fat (good for hitting your daily targets). If you want that briny, plump bite mussels give you, try scallops at around 3 g net carbs for 3 oz, lower than mussels and quick to sear in butter.
Track Your Ketone Levels
The Keto-Mojo meter is the gold standard for confirming you're actually in ketosis. Know your numbers - don't guess.