Tamari fits keto when used sparingly. It’s a usually gluten-free soy sauce alternative with low carbs per typical serving (~1g per tbsp); check labels for wheat and added sugars.
Is Tamari Keto?

Tamari fits keto when used sparingly. It’s a usually gluten-free soy sauce alternative with low carbs per typical serving (~1g per tbsp); check labels for wheat and added sugars.
Each 100g serving delivers 4.8g net carbs, making it easy to keep things keto-friendly.
- Net carbs (100g)4.8g
- Protein (100g)9g
- Fat (100g)0.2g
- Keto verdictKeto-friendly
NUTRITION FACTS
Per 100g (raw)
Source: USDA FoodData Central
WHY IT'S KETO-FRIENDLY
- Low net carbs per tablespoon (~1g) adds umami without spiking carbs
- Works as a 1:1 swap for soy sauce in keto stir-fries and marinades
- Intense flavor means small amounts go a long way
HEALTH BENEFITS
- Provides umami that can increase satisfaction and help adherence
- Contains small amounts of protein and minerals from fermentation
PREPARATION SUGGESTIONS
STIR-FRIES
Use as the salty base for keto stir-fries with chicken-thighs, broccoli, and sesame-oil.
QUICK MARINADE
Mix tamari with garlic, ginger, and a splash of rice vinegar; marinate salmon or tofu, then pan-sear.
WHERE TO BUY
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San-J Gluten Free Tamari Soy Sauce, Specially Brewed 100% Soy
San-J's tamari is brewed with 100% soy and no wheat filler, so at roughly 1g net carb per tablespoon it delivers full umami depth for keto stir-fries and marinades without the gluten or hidden sugars found in standard soy sauce.

Eden Foods Organic Tamari Soy Sauce, Naturally Fermented, Gluten Free, 10 oz
Eden's tamari is USDA Certified Organic and naturally fermented from whole non-GMO U.S. soybeans over a slower traditional brew, giving it a deeper, more rounded umami than mass-market soy sauces while keeping the same negligible carb count (about 1g net carb per tablespoon) that makes tamari keto-friendly.

Kikkoman Gluten Free Tamari Soy Sauce, 10 fl oz
From the most recognized soy sauce maker on the planet, Kikkoman's tamari is GFCO-certified gluten-free and Non-GMO Project verified, brewed from just water, soybeans, salt, and a touch of sugar, and it's stocked at nearly every mainstream grocery store, making it the easiest low-carb, keto-friendly tamari to restock without a specialty order.