Tamari is a Japanese-style soy sauce traditionally made with little to no wheat. It is fermented, savory, and used in small amounts, resulting in very low net carbohydrates. Tamari is commonly used in low-carb and keto cooking as a gluten-free alternative to regular soy sauce.

Quick Carb Snapshot

  • Carbs (per 100 g): ~3–4 g
  • Carbs (standard portion): ~0–1 g per tbsp
  • Glycemic Index: Very low
  • Similar Low-Carb Options: Soy sauce, fish sauce
  • Blood Sugar Impact: Lower (portion-aware)
  • Keto-Friendly? Yes

Key Traits

  • Texture: Thin liquid
  • Flavor: Rich, umami, slightly less salty than soy sauce
  • Carb Impact: Low
  • GI / GL Notes: Minimal blood glucose effect
  • Common Uses: Marinades, stir-fries, dipping sauces

Best For

  • Gluten-free Asian cooking
  • Low-carb flavor enhancement
  • Keto marinades

Avoid For

  • Soy allergies
  • High-sodium diets
  • Sugar-added brands

Why Choose Tamari for Low-Carb Eating

Texture & Structure

  • Liquid seasoning only
  • No thickening properties
  • Used in small quantities

Flavor & Nutrition

  • Deep umami flavor
  • Minimal calories
  • Lower carbs than sweet sauces

Storage & Shelf Life

Pantry

Shelf-stable unopened; refrigerate after opening for best quality.

Cooked

Dishes store normally depending on recipe.

Signs It Has Gone Bad

  • Off odor
  • Mold near cap
  • Flavor degradation

Allergy & Dietary Flags

  • Gluten-Free: Often (verify brand)
  • Nuts: No
  • Nightshade: No
  • Vegan / Vegetarian: Yes

Often compared to soy sauce and fish sauce, tamari delivers
gluten-free umami with very low carbs.

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