GOS vs inulin: two prebiotics, two sources
Both feed beneficial gut bacteria, but they come from different places and behave differently in a formula. The source molecule decides where each one belongs.
The comparison
| GOS | Inulin | |
|---|---|---|
| Source | Lactose (milk) | Chicory root / Jerusalem artichoke |
| Structure | Galactose chains | Long fructose chains |
| Content | ≥57% on solids | ≥90% (typical) |
| Sweetness | Mild | Very mild (10-30% of sucrose) |
| Best role | Infant formula, gut-health dairy | Fiber fortification, fat replacement |
The deciding difference
GOS is built from lactose, so its galactose structure mirrors the oligosaccharides in human milk — the reason it is the prebiotic standard in infant formula. Inulin comes from chicory root and brings a longer fructose chain that ferments more slowly, with a neutral, barely-sweet profile.
For a manufacturer the choice usually runs: infant or early-life product → GOS; adult fiber fortification or a fat-replacement texture job → inulin. GOS carries the gut-health story with a mild sweetness; inulin carries fiber and creamy mouthfeel with almost no sweetness.
The short version
Infant formula, dairy and gut-health supplements → GOS. Adult fiber fortification and fat replacement → inulin. We supply organic GOS (USDA + EU certified); pair it with your fiber choice to hit the full prebiotic picture.