Agar Agar Overview
Quick Carb Snapshot
- Carbs (per 100 g): ~80 g total, ~0–1 g net
- Carbs (standard portion): ~0 g net per tsp
- Glycemic Index: Very low
- Best Substitutes: Gelatin, carrageenan
- Diabetic-Friendly? Yes
- Keto-Friendly? Yes (small amounts)
Key Traits
- Texture: Powder or flakes
- Flavor: Neutral
- Carb Impact: Very low net carbs
- GI / GL Notes: Fiber-based; no glucose spike
- Common Uses: Gels, jellies, custards, sauces
Best For
- Plant-based gelling
- Low-carb desserts
- Heat-stable gels
Avoid For
- Overuse (rubbery texture)
- Cold-set applications without boiling
- Recipes needing elastic gels
How Agar Agar Compares to Higher-Carb Ingredients
Texture & Structure
- Sets firmer than gelatin
- Requires boiling to activate
- No starch-based thickening
Flavor & Nutrition
- No calories or sugars
- Plant-derived fiber
- Neutral taste
How to Substitute Agar Agar
Low-Carb Swaps by Use
- Gelling: Gelatin
- Sauces: Xanthan gum
- Vegan desserts: Carrageenan
Tips for Successful Swaps
- Boil fully to activate
- Measure carefully
- Test set before serving
Storage & Shelf Life
Pantry
Store airtight in a cool, dry place.
Cooked
Agar-set foods keep 4–5 days refrigerated.
Signs It Has Gone Bad
- Moisture clumping
- Off odor
- Loss of gelling power
Carb / Keto & Dietary Notes
- Carb Impact: Very low net carbs
- Keto Use: Yes (small amounts)
- Diabetic Notes: Safe
This information is for educational purposes only and not medical advice.
Allergy & Dietary Flags
- Gluten-Free: Yes
- Nuts: No
- Nightshade: No
- Vegan / Vegetarian: Yes
Carb & Dietary Tags
- Low-Carb: Yes
- High-Carb: No
- Keto-Friendly: Yes
- Diabetic-Friendly: Yes
- Low GI: Yes
Related Ingredients
Often compared to gelatin and carrageenan, agar agar provides plant-based gelling with minimal carb impact.