Yacon Syrup vs Sugar: The Andean Sweetener That Feeds Your Gut
The Andean sugar substitute that actually feeds your gut
Most "natural sugar alternatives" do one thing: replace sugar's calories with something different. Stevia goes to zero calories. Honey adds nutrients but still spikes blood sugar. Maple syrup is just less-processed sucrose.
Yacon syrup does something stranger. It tastes sweet but barely raises blood sugar, has about a third of the calories of sugar, and is mostly composed of fiber that feeds the bacteria in your gut. The Peruvians figured this out a few thousand years before nutrition science caught up.
What is Yacon syrup?
Yacon (Smallanthus sonchifolius) is a root vegetable native to the Andes — looks like a sweet potato, tastes like a cross between an apple and a watermelon when raw. The Andean farmers who grow it press the root and reduce the juice into a thick, dark syrup. The result has the consistency of molasses and a flavor that's similar to maple but more figgy and earthy.
Why it doesn't spike blood sugar
Most of yacon's sweetness comes from fructooligosaccharides (FOS) — short chains of fructose that the human gut doesn't fully digest. They taste sweet on the tongue, but they pass through to the colon mostly intact. Your blood sugar response to a tablespoon of yacon syrup is roughly half what it'd be to the same amount of honey.
This makes yacon useful for:
- People with prediabetes or type 2 diabetes (with doctor's clearance)
- Anyone managing weight
- People on low-glycemic or keto-adjacent diets
- People sensitive to sugar's mood effects
The prebiotic angle
Here's where yacon gets interesting. The undigested FOS that passes to the colon is exactly what beneficial gut bacteria (Bifidobacteria, Lactobacilli) eat. Yacon is one of the most concentrated natural sources of prebiotic fiber on the planet. So you're not just avoiding the bad effects of sugar — you're feeding your microbiome at the same time.
Peruvians don't talk about it in those terms. They just say yacon is "good for the digestion." Modern research is essentially catching up to that observation.
Calories and sweetness compared
| Sweetener | Cals per tbsp | Glycemic Index |
|---|---|---|
| White sugar | 49 | 65 |
| Honey | 64 | 55 |
| Maple syrup | 52 | 54 |
| Yacon syrup | ~20 | ~1 |
About 1/3 the calories of sugar with virtually no glycemic impact. Sweetness is roughly 70–80% of sugar — so you might use a tiny bit more to get the same sweet level.
*These statements have not been evaluated by the FDA. Yacon syrup is not intended to diagnose, treat, cure, or prevent any disease.
How to use it
Anywhere you'd use honey or maple syrup:
- Drizzle on yogurt, oatmeal, pancakes
- Sweetener for tea or coffee
- In smoothies
- In salad dressings (works surprisingly well with vinegar)
- Spoonful straight (Peruvians do this)
Don't bake with it as a 1:1 sugar replacement — yacon caramelizes differently. Use 75% the amount and adjust to taste.
How much per day?
1–2 tablespoons is the typical daily range. Beyond that, the prebiotic FOS can cause some digestive upset (like any fiber-rich food). Start with 1 teaspoon and work up.
Who should be careful
- People with IBS or sensitive digestion (start very small)
- People on blood-sugar-lowering medications (yacon can amplify)
- Pregnant or breastfeeding women (limited research)
Try it
We carry organic Yacon Syrup in 1, 2, and 4-jar packs. Sourced directly from Peruvian growers, cold-pressed, and reduced naturally.
For more Andean superfoods, see our full Powders, Liquids & Others collection.