Cellulose
The structural fibre of plant cell walls, used in food to add bulk, prevent caking, and thicken without adding calories.
What is it?
Cellulose is the most abundant organic polymer on Earth, making up the rigid cell walls of plants. As a food additive, it is purified from wood pulp or cotton fibres. E460 covers two main forms: microcrystalline cellulose (MCC, E460i), which is a fine white powder produced by partially hydrolysing cellulose with acid, and powdered cellulose (E460ii), which is mechanically ground plant fibre. Both are chemically identical to the cellulose naturally present in vegetables, grains and fruit.
What does it do?
Cellulose is insoluble in water and resists digestion, so it passes through the gut largely intact. In food manufacturing it acts as a bulking agent, adding physical volume and texture without contributing digestible calories. It also functions as an anti-caking agent by absorbing surface moisture and keeping powders free-flowing, as a fat replacer by mimicking the mouthfeel of fat in reduced-calorie products, and as a stabiliser and thickener in emulsions and suspensions. Microcrystalline cellulose is particularly effective at stabilising foams and emulsions because its particles arrange at oil-water interfaces.
Where you will see it
Found in shredded cheese (prevents clumping), low-fat spreads, diet or reduced-calorie baked goods, dietary supplements and tablets (as a filler and binder), protein powders, processed meat products, sauces, dressings, ice cream, and some breads. On UK labels it appears as cellulose, microcrystalline cellulose, powdered cellulose, or E460.
What the science says
Gut effects and dietary fibre behaviour
Cellulose is a non-fermentable insoluble dietary fibre. Unlike soluble fibres such as inulin or pectin, it is not substantially broken down by gut bacteria in the human colon. It adds bulk to stool and reduces transit time, effects consistent with other insoluble fibres. There is no established concern from food-use quantities, and it has been part of the human diet naturally for all of human history as the structural component of every plant food.
Microcrystalline cellulose is not digested or absorbed in the human gastrointestinal tract and contributes negligible metabolisable energy.
Insoluble dietary fibre, including cellulose, increases faecal bulk and reduces large-bowel transit time, effects that are well established across multiple human studies.
High-dose animal studies
In high-dose animal feeding studies, cellulose at very large proportions of the diet (far beyond food-use levels) has been used as an inert dietary bulking control, confirming its lack of systemic toxicity. No carcinogenicity, reproductive toxicity, or organ toxicity has been demonstrated at realistic dietary exposures in long-term animal studies.
Cellulose fed to rodents as a major component of the diet in long-term studies produced no carcinogenic, reproductive, or organ-toxic effects.
Nanocellulose: an emerging research area distinct from food-grade cellulose
Some academic research explores nanocellulose particles (engineered at nanometre scale) for food packaging and novel ingredient use. These are structurally different from the food-grade MCC and powdered cellulose approved under E460. Regulatory agencies have not approved nanocellulose as a food additive and it is not the form used in current UK food products under E460.
EFSA has noted that novel nanocellulose forms would require separate safety assessment and are not covered by existing authorisations for E460.
Where it stands with the regulators
Who should be careful
No group is required to avoid it. People with severe gut motility disorders or those on very-low-fibre medical diets should consider that high intakes of any insoluble fibre, including cellulose from supplements, could affect their condition, and should check with a doctor. Look for cellulose, microcrystalline cellulose, or E460 on the label.
The honest read
Cellulose is structurally identical to the fibre in a stick of celery or a slice of wholegrain bread. The food-additive form is purified from wood pulp or cotton, which sounds unfamiliar, but the molecule is the same. It has been evaluated by JECFA and EFSA and carries no numerical ADI because the evidence from decades of use and animal studies produced nothing to set a limit against. The only genuinely open research thread is nanocellulose, which is a different engineered material not authorised under E460 and not present in supermarket food today. For the forms actually used in food, the science is long-established and uncontroversial.
Related additives
Common questions
Is E460 banned in the UK?
No. Cellulose (E460) is approved for use in the UK and EU under the FSA approved-additives list and assimilated EU Regulation 1333/2008. It carries no ban or restriction.
Is E460 just sawdust?
The cellulose in food is purified from wood pulp or cotton fibres, which gives rise to this description. Chemically and structurally, however, it is identical to the cellulose in every vegetable, fruit and grain you eat. The source is industrial, the molecule is the same as natural dietary fibre.
What foods contain E460?
Shredded and grated cheese (prevents clumping), low-fat and diet baked goods, dietary supplement tablets, protein powders, processed meats, ice cream, salad dressings and sauces. Check labels for cellulose, microcrystalline cellulose, powdered cellulose, or E460.
Is E460 vegan?
Yes. Cellulose is derived from plant material (wood pulp or cotton). It contains no animal-derived ingredients and is suitable for vegans and vegetarians.
Sources
- UK FSA Approved Additives and E Numbers
- EFSA ANS Panel opinion on cellulose (E460)
- JECFA monograph on cellulose (microcrystalline)
- SACN Carbohydrates and Health report
- EFSA Scientific Committee guidance on nanomaterials in the food chain
- EU Regulation 1333/2008 on food additives (Annex II)
See this on every food you scan
NutraSafe reads the label and puts every additive into plain English, with the source, right in the app.
Get NutraSafe on the App Store