Lipase
A natural fat-splitting enzyme used in cheesemaking and baking to develop flavour and improve texture.
What is it?
Lipase is a naturally occurring enzyme that breaks down fats (triglycerides) into fatty acids and glycerol. Commercial food-grade lipases are extracted from animal sources such as calf, kid or lamb pre-gastric tissue, or produced by fermentation of microbial strains including Aspergillus niger, Aspergillus oryzae, Mucor miehei, Candida rugosa, Rhizopus oryzae, and certain genetically modified variants of Aspergillus oryzae. The enzyme falls under the food enzymes regulatory framework rather than the conventional food additives list.
What does it do?
Lipase catalyses the hydrolysis of triglycerides, cleaving fatty acid chains from glycerol backbones. In cheesemaking this releases short-chain free fatty acids, particularly butyric, caproic, caprylic and capric acids, which are the primary contributors to the pungent or buttery character of hard Italian-style cheeses such as Parmesan, Romano and Provolone. In bread and baked goods, lipase acts on flour lipids to produce lysophospholipids, which act similarly to emulsifiers, strengthening gluten networks and improving crumb softness and shelf life without adding a separate emulsifier. At the doses used, the enzyme is largely inactivated by heat during cooking or baking.
Where you will see it
Predominantly found in hard and semi-hard ripened cheeses, processed cheese, cream and other dairy-based products. Also used in bread, flour-based bakery products, margarine, and some meat products. The enzyme is classed as a processing aid in many uses, meaning it may not appear on the label at all when it is fully inactivated and has no functional role in the final product. When declared, it appears as 'lipase' or 'E1104' in the ingredients list.
What the science says
Digestive role and normal dietary presence
Lipases are endogenous enzymes produced by the human pancreas and used continuously in normal fat digestion. The human body produces and uses lipase naturally for every fat-containing meal, so the minute residual quantities from food processing are effectively indistinguishable from what the gut already handles. No specific toxicological concern has been identified from dietary exposure to food-processing lipase at permitted levels.
Lipases are classified as processing aids when inactivated during production; at these exposure levels no adverse effects have been identified in safety evaluations conducted under the EU food enzymes framework.
Animal-derived and GM-derived source considerations
Some lipase preparations are derived from animal pancreatic or pre-gastric tissue, raising considerations for vegetarians, vegans, and certain religious dietary practices. Others come from genetically modified microbial strains (notably GM Aspergillus oryzae). EFSA has evaluated several specific GM-derived lipase preparations for safety and found dietary exposure well below levels of concern, though each production strain requires its own authorisation under the EU food enzymes framework.
Safety evaluation of triacylglycerol lipase from GM Aspergillus oryzae strain NZYM-FL found no safety concern at estimated dietary exposures.
Safety evaluation of triacylglycerol lipase from GM Aspergillus oryzae strain NZYM-AL found no safety concern at the intended uses evaluated.
Occupational asthma risk (not a consumer concern)
Enzyme dust in industrial bakery or dairy processing environments is a well-documented cause of occupational asthma and allergic sensitisation in workers. This is a route-of-exposure issue specific to inhalation of concentrated enzyme powder during handling, not to consumers eating food that contains trace residues. The inactivated, diluted residue in a finished loaf or cheese presents no comparable inhalation risk.
Occupational exposure to enzyme dusts in bakeries is associated with work-related asthma; this is an inhalation effect in workers, not a dietary risk in consumers.
Where it stands with the regulators
Who should be careful
Vegans and vegetarians should note that some lipase preparations are derived from animal (calf, kid or lamb) pre-gastric tissue or pancreas. Halal and kosher dietary requirements may also be affected depending on the animal source and slaughter method. Look for 'lipase' or 'E1104' in the ingredients list, though it may be absent if used only as a processing aid. If source matters, contact the manufacturer directly as the label does not specify the origin of the enzyme.
The honest read
Lipase is one of the most established processing enzymes in the food industry, with centuries of use in traditional cheesemaking before it received an E-number. The science on dietary exposure is settled at the level of normal food intake: the enzyme is either inactivated by heat before the food reaches you, or present in quantities the digestive system handles without any distinct effect. The more live regulatory question is about the source of the enzyme preparation, which matters for dietary and religious reasons but is not a health-hazard question. The EU food enzymes union list is still being compiled, which is an administrative and trade process rather than a signal of unresolved safety concerns.
Related additives
Common questions
Is E1104 banned in the UK?
No. Lipase (E1104) continues to be permitted in the UK and EU as a food enzyme under transitional arrangements while the official food enzymes union list is finalised. It is not on the FSA's food additives list because it is regulated under the separate food enzymes framework, not as a conventional food additive.
Is E1104 vegan?
Not always. Some lipase preparations are derived from calf, kid or lamb pre-gastric tissue or pancreas, making them non-vegan and potentially non-vegetarian. Others are produced by microbial fermentation, including from genetically modified strains of Aspergillus oryzae, and would be considered vegan. The ingredient label says only 'lipase' or 'E1104' without specifying the source. Contact the manufacturer if the source matters to you.
What foods contain E1104?
Mainly hard and semi-hard ripened cheeses such as Parmesan, Romano, Provolone and similar Italian-style varieties, where lipase creates the characteristic sharp, buttery flavour. Also found in some bread and bakery products where it acts on flour lipids to improve crumb texture. In many bakery uses it functions as a processing aid and may not appear on the ingredient label.
Does E1104 survive cooking or baking?
Largely no. Lipase is a protein-based enzyme and is inactivated by the heat of baking or cooking. In bread, the enzyme is denatured during oven baking. In cheese, residual activity depends on the ripening process and temperature. By the time most products reach the consumer, the enzyme has done its work and is no longer functionally active.
Sources
- Food Standards Agency: Approved additives and E numbers
- Food Standards Agency: Food enzymes authorisation guidance
- Regulation (EC) No 1332/2008 of the European Parliament and of the Council on food enzymes
- The Food Enzymes Regulations 2009 (SI 2009/3235)
- EFSA: Food enzymes topic overview
- EFSA CEP Panel: Revised dietary exposure assessment of triacylglycerol lipase from GM Aspergillus oryzae strain NZYM-FL (PMC11653024)
- EFSA CEP Panel: Safety evaluation of triacylglycerol lipase from GM Aspergillus oryzae strain NZYM-AL, EFSA Journal 2026
- European Commission: Food enzymes EU Rules
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