Fish sauce is keto-friendly when unsweetened—~3.6g net carbs per 100g (about 0.2g per teaspoon) and used in tiny amounts (1–2 tsp). A powerful umami booster for dressings, marinades, and stir-fries.
Is Fish Sauce Keto?

YOUR PORTION
How much are you having?
Per 100 g (as listed by source). USDA FoodData Central.
Scales this reference to your portion, with no extra deductions. Calculation and units.
3.6gnet carbs in your portion
- Total carbs
- 3.6g
- Fiber
- 0g
- Protein
- 5g
- Fat
- 0g
- Calories
- 35
The 100 g reference amount provides 3.6g net carbs and can fit common keto portions.
- Net carbs (100 g)3.6g
- Protein (100 g)5g
- Fat (100 g)0g
- Keto verdictKeto-friendly
NUTRITION FACTS
Per 100 g (as listed by source)
Source: USDA FoodData Central reference record
Source fit: generic reference; variety, brand, or preparation may differ
Net-carb calculation: total carbohydrate - fiber
This USDA record is used as a generic nutrition reference; variety, brand, or preparation may differ.
Nutrition record reviewed 2026-07-09. Maintained by KetoLens Team.
WHY IT'S KETO-FRIENDLY
- Very low net carbs and used by the teaspoon
- Massive flavor-per-drop reduces need for sugary sauces
- Fermented and concentrated—great for umami without carbs
- Pairs with fatty meats and oils to balance keto macros
PREPARATION SUGGESTIONS
KETO NƯỚC CHẤM
Whisk fish sauce with lime juice, water, minced garlic, chili, and a touch of allulose for a classic Vietnamese-style dipping sauce.
UMAMI STIR-FRY
Finish a skillet of Cauliflower Rice or Shirataki Noodles with 1–2 tsp fish sauce and Sesame Oil.
MARINADE BOOSTER
Add to garlic–ginger–lime marinades for chicken thighs or pork; a little goes a long way.
SAVORY DRESSINGS
Blend with White Vinegar, lime, chili, and olive oil for a punchy salad dressing.
OPTIONAL BUYING OPTIONS
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