Keto-friendly as a spice. Per 100g they’re ~16g net carbs, but typical use is 1 tsp (~2g) ≈ 0.3g net—negligible. Big flavor, tiny carb impact.
Are Mustard Seeds 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.
15.9gnet carbs in your portion
- Total carbs
- 28g
- Fiber
- 12g
- Protein
- 26g
- Fat
- 36g
- Calories
- 508
The 100 g reference amount has 15.9g net carbs, so measure portions carefully.
- Net carbs (100 g)15.9g
- Protein (100 g)26g
- Fat (100 g)36g
- Keto verdictEnjoy in moderation
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.
HOW TO ENJOY IT ON KETO
- Seasoning-size portions (~1 tsp/2g) add ~0.3g net carbs—easy to fit in keto
- High flavor intensity means you use very little
- Primarily fat and protein by calories; no added sugar
- Great for pickling and condiments that keep carbs low
- Grinding releases pungent compounds without adding carbs
- Per-100g carbs are higher, but practical serving sizes are tiny
PREPARATION SUGGESTIONS
MUSTARD PASTE
Grind seeds and mix with vinegar, water, and spices to create keto mustard condiment.
PICKLING SPICE
Use whole seeds in pickling brine for pickled vegetables and keto condiments.
SEED CRUST
Toast and grind finely to coat fish or poultry with distinctive, pungent flavor.
CURRY SPICE
Toast seeds and add to Indian-inspired keto curry dishes for authentic flavor.
CABBAGE SLAW
Toast seeds lightly and add to vinegar-based coleslaw dressing.
THIS ITEM CONTAINS THE NUTRIENTS OR COMPOUNDS LISTED ABOVE; EVIDENCE FOR SPECIFIC HEALTH OUTCOMES DEPENDS ON DOSE, PREPARATION, AND INDIVIDUAL CONTEXT.
Grind and add to soups and stews for health benefits and unique flavor.