What It Actually Is
Inulin is a soluble fiber extracted from chicory root, a plant in the same family as dandelion. It passes through the small intestine undigested and reaches the colon intact.
What Research Generally Shows
Inulin is one of the most well-studied prebiotic fibers, shown to selectively feed beneficial gut bacteria like Bifidobacteria, which is relevant given SodaTide also includes a Bifidobacterium strain.
Why 211mg Is Worth Noting
This is a meaningful, clearly disclosed dose — many prebiotic fiber studies use doses in a comparable range, though clinical studies sometimes use higher amounts (several grams) for specific digestive outcomes.