Fish and shellfish are very keto-friendly. Salmon and other fish are not only nearly carb-free but also rich in B vitamins, potassium, and selenium (9Trusted Source).
However, the carb count in shellfish varies by type. While shrimp and most crabs contain no carbs, oysters and octopus do. You can still eat these foods on the keto diet, but it’s important to carefully track these carbs to stay within your range (10Trusted Source, 11Trusted Source, 12Trusted Source, 13Trusted Source).
Additionally, salmon, sardines, mackerel, and other fatty fish are very high in omega-3 fats, which have been associated with lower insulin levels and increased insulin sensitivity in people who are overweight or have obesity (14Trusted Source).
Frequent fish intake is linked to improved brain health and a decreased risk of disease (15Trusted Source, 16Trusted Source).
The American Heart Association recommends that adults over 18 years old eat 8–10 ounces of seafood per week (17Trusted Source).
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