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
• Blood Sugar Impact: High (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

Why Ketchup Are High-Carb

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

Best Low-Carb Ways to Replace 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

Allergy & Dietary Flags

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

Related Ingredients

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