Dextran

Prebiotic

What is it

Dextran is a complex polysaccharide produced by bacterial fermentation of sucrose, mainly by Leuconostoc species. In supplements it is used as a carrier, bulking agent, or matrix material rather than as a nutrient.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Manufacturing utility (carrier/matrix)

Strong Evidence

Dextran is a well-characterized polysaccharide used as a carrier and matrix material in pharmaceutical and food applications.

How it works

Dextran is a branched glucose polymer that is largely resistant to digestion by human enzymes. Small dextrans can be absorbed slightly, while larger fractions pass through the gut intact. In medicine, certain dextran fractions are used intravenously as plasma volume expanders; the oral excipient role in supplements is distinct from those uses.

Dosage

Dextran in supplements is an inactive ingredient at low amounts. Medical IV preparations are dosed under clinical supervision and are unrelated to consumer supplement use.

When and how to take it

Part of the supplement form; taken whenever the product is taken.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Excipient dextran

Used as a bulking or carrier ingredient in supplements.

Largely not absorbed orally

Safety

Oral dextran as an excipient is well tolerated and not absorbed in nutritionally significant amounts. Intravenous dextrans can rarely cause severe allergic reactions, but this is not relevant to oral supplement use.

Who should be cautious

No specific caution at supplement levels. Anyone with a known reaction to dextran-containing IV products should mention it to a clinician.

Interactions

No significant interactions reported for oral excipient use.

Frequently asked questions

Is dextran sugar?⌄

It is made from sugar by fermentation, but it is a polysaccharide and behaves more like a fiber-like polymer than sugar in the gut.

Is oral dextran safe?⌄

At the small amounts used in supplements, yes. Severe reactions described in older medical literature are linked to intravenous use, not oral excipients.

References

Dextran on Wikidata — Wikidata link

Dextran (ChEBI:52071) — ChEBI link

Dextran on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Dextran (PubMed search) — PubMed link

Track Dextran with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.