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Limited evidenceHeart & metabolic

Chitin-Glucan

An insoluble fibre from fungal cell walls (usually Aspergillus niger), marketed for oxidised LDL and cardiovascular risk. The claim rests on essentially one randomized trial, and the effect on standard cholesterol values was absent.

Where to buy

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What the science says

  • Oxidised LDL Limited evidence

    A multicentre randomized controlled trial found that chitin-glucan fibre reduced oxidised LDL concentrations compared with control over several weeks. It is a single trial using a surrogate marker, not clinical cardiovascular outcomes.

  • Standard lipid values Limited evidence

    In that same trial, chitin-glucan did not meaningfully change LDL cholesterol, HDL cholesterol or triglycerides. Anyone buying it expecting cholesterol lowering should know that was not observed.

Dosage & safety

Studied doseThe trial used roughly 1.5–4.5 g of chitin-glucan per day. Commercial products commonly supply 1.5–3 g daily.
SafetyFibre-type effects predominate: bloating, gas and altered stools. Because the source is a fungus, people with mould or fungal allergy should be cautious, and shellfish-allergic consumers should note that some chitin sources are crustacean-derived even though this one is not. Take separately from medications, as with any bulk fibre.

How to take it

TimingWith meals, since it works on dietary fats as they are digested.
With food?With food and plenty of water.
Worth knowingStart at the low end and build up over a couple of weeks — jumping straight to 3 g reliably produces gas and loose stools.

Interactions

With medications

  • any oral medication

    Bulk fibre can slow or reduce drug absorption when taken at the same time. separate by at least 2 hours

With other supplements

  • fat-soluble vitamins and mineral supplements

    A fat- and mineral-binding fibre reduces absorption when taken together. take them at a different time of day

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Does chitin-glucan lower cholesterol?

Chitin-glucan did not meaningfully change LDL cholesterol, HDL cholesterol or triglycerides in the one randomized trial behind it, so do not buy it expecting cholesterol lowering. That trial did find lower oxidised LDL, but it is a single study of a surrogate marker, so the evidence is limited.

How much chitin-glucan should I take per day?

The chitin-glucan trial used roughly 1.5–4.5 g per day, and commercial products commonly supply 1.5–3 g daily. Take chitin-glucan with meals and plenty of water, starting low and building up over a couple of weeks.

Can I take chitin-glucan with medications?

Chitin-glucan is a bulk fibre that can slow or reduce drug absorption, so separate it from any oral medication by at least 2 hours. Take fat-soluble vitamins and mineral supplements at a different time of day too.

Is chitin-glucan safe with a shellfish or mould allergy?

Chitin-glucan is usually made from the fungus Aspergillus niger, so people with mould or fungal allergy should be cautious. This source is not crustacean-derived, although some other chitin sources are, which shellfish-allergic buyers should check.

Scientific references

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