Ketchup Overview

Ketchup is a tomato-based condiment that typically contains added sugar. While tomatoes themselves are relatively low in carbs, the sweetened version of ketchup can add significant carbohydrates quickly. Standard ketchup is not ideal for low-carb, keto, or diabetic-friendly eating unless used sparingly.

Quick Carb Snapshot

  • Carbs (per 100 g): ~25–30 g
  • Carbs (standard portion): ~4–5 g per tablespoon
  • Glycemic Index: Moderate to High
  • Best Substitutes: No-sugar-added ketchup, mustard
  • Diabetic-Friendly? No (standard)
  • Keto-Friendly? No (standard)

Key Traits

  • Texture: Smooth, thick
  • Flavor: Sweet-tangy
  • Carb Impact: Moderate to high
  • GI / GL Notes: Sugar content drives glucose response
  • Common Uses: Condiment, dips, sauces

Best For

  • Traditional condiments (small amounts)
  • Carb-inclusive meals
  • Occasional flavor accents

Avoid For

  • Keto or strict low-carb diets
  • Diabetic-friendly meals (unless sugar-free)
  • Heavy dipping use

How Ketchup Compares to Higher-Carb Ingredients

Texture & Structure

  • Thickened tomato sauce
  • Easy to use in large amounts
  • Often paired with carbs

Flavor & Nutrition

  • Sweetness dominates
  • Low nutrient density relative to carbs
  • Higher carb impact than plain tomato products

How to Substitute Ketchup

Low-Carb Swaps by Use

  • Dipping: Sugar-free ketchup
  • Condiment: Mustard
  • Sauce base: Tomato paste + vinegar + sweetener

Tips for Successful Swaps

  • Check labels for added sugars
  • Use portion control
  • Balance with vinegar and spices

Storage & Shelf Life

Pantry

Unopened ketchup is shelf-stable.

Cooked

Opened ketchup keeps several months refrigerated.

Signs It Has Gone Bad

  • Mold
  • Off smell
  • Excess separation

Carb / Keto & Dietary Notes

  • Carb Impact: Moderate to high
  • Keto Use: Only sugar-free versions
  • Diabetic Notes: Choose sugar-free; watch portions

This information is for educational purposes only and not medical advice.

Allergy & Dietary Flags

  • Gluten-Free: Usually (check labels)
  • Nuts: No
  • Nightshade: Yes (tomato-based)
  • Vegan / Vegetarian: Yes

Carb & Dietary Tags

  • Low-Carb: No (standard)
  • High-Carb: Yes
  • Keto-Friendly: No (standard)
  • Diabetic-Friendly: No (standard)
  • Low GI: No

Often compared to barbecue sauce and sweet chili sauce, ketchup is best replaced with sugar-free ketchup or mustard.

Quick Carb Snapshot

Low-Carb Swaps

Primary:
Tomato Paste (small amounts; low glycemic load)

Secondary:
Allulose

Swap Notes

Use tomato paste with vinegar, spices, and allulose instead of ketchup.

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