Use in Moderation
Oysters (Raw)
4.20g net carbs per 3 oz (about 6)
Higher carbs than most seafood. Zinc-rich but limit to 6 per sitting.
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 21% of your 20g daily budget.
Plan the rest of your day
Good to Know
Most of the 4.2 g of carbs here comes from the glycogen oysters store, which is unusual for shellfish and the reason a 3 oz portion of about 6 lands higher than shrimp or white fish. Skip the fried versions and oyster po'boys, since breading and cornmeal coatings stack on extra carbs fast, and watch cocktail sauce too (a typical 2 tablespoon serving can add 6 to 8 g of sugar). If you buy them shucked in a tub, check the label for any added liquid or starch, and pass on smoked tinned oysters packed in sauces that list sugar near the top.
Is Oysters (Raw) Keto? The Full Answer
Oysters contains 4.20g net carbs per 3 oz (about 6) (4.20g total carbs minus 0.00g fiber). Higher carbs than most seafood. Zinc-rich but limit to 6 per sitting.
On a standard ketogenic diet, most people target 20-25g net carbs per day. A single serving uses 21% of a 20g daily carb limit. Track your portions carefully and account for other carbs in your meals.
Better Keto Swaps
Oysters are a tasty shellfish, but those 4.2 g of net carbs per 3 oz add up faster than most seafood. If you want the briny, low-effort protein without the carb hit, try these. Shrimp comes in at about 0 g net carbs per 3 oz, so you can pile them on and barely move your daily total. Wild-caught salmon is another easy pick at roughly 0 g net carbs per 3 oz, plus it brings a generous dose of fat that fits keto well. Mussels run a touch higher at around 3 g net carbs per 3 oz, still lower than oysters, and they keep that same shellfish character if that's what you're craving.
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.