Lecithin
A natural emulsifier extracted mainly from soya or sunflower seeds, used to stop fats and water from separating in processed foods.
Soya-derived lecithin must be declared on the label as a soya allergen. People with a soya allergy should check the source; sunflower lecithin is an alternative used by some manufacturers.
What is it?
Lecithins are a group of fatty substances (phospholipids) found naturally in plant seeds, egg yolk and animal tissues. In food production they are most often extracted from soya beans, sunflower seeds, or rapeseed. The extracted material is a mixture of phosphatidylcholine, phosphatidylethanolamine and other phospholipids.
What does it do?
Lecithin acts as an emulsifier: its molecules have one end that binds to fat and one end that binds to water, so they sit at the boundary between the two and prevent them from separating. This gives chocolate a smooth pour, keeps salad dressings uniform, and gives bread a soft, even crumb. At higher concentrations it can also act as a thickener.
Where you will see it
Chocolate and chocolate coatings, margarine, low-fat spreads, mayonnaise and salad dressings, bread and baked goods, infant formula, instant soups, cooking sprays, and many ready meals. On a UK label it appears as 'lecithin', 'soya lecithin', 'sunflower lecithin', or 'E322'. If the source is soya, the word 'soya' must appear on the label.
What the science says
Allergen risk from soya-derived lecithin
Most commercial lecithin comes from soya beans, and soya is one of the 14 major allergens under UK and EU food law. Although commercial soya lecithin is highly refined and contains very low levels of soya protein, some individuals with soya allergy report reactions. The FSA investigated this and found the allergen risk from highly refined lecithin to be low for most soya-allergic people, but individual responses vary.
Soya is a declarable allergen under UK food law; when lecithin is derived from soya, the word 'soya' must appear prominently on the ingredients list.
Commercial soya lecithin is highly refined and residual soya protein content is very low; however, clinical reactions in sensitised individuals have been reported in the literature.
EFSA re-evaluation: no numerical safety limit set, data gap for young infants flagged
EFSA completed a full re-evaluation of E322 in 2017 and did not set a numerical acceptable daily intake, because lecithins are normal constituents of the diet and the body handles them through ordinary fat metabolism. However, EFSA identified a data gap for use in infant formula for babies under 16 weeks of age and issued a follow-up opinion in 2020 specifically covering that group. The 2020 opinion found the permitted maximum levels in infant formula to be of no safety concern at typical intakes, but called for continued monitoring.
EFSA concluded that lecithins (E322) do not raise a safety concern at the reported use levels in food for the general population and set no numerical ADI.
A follow-up EFSA opinion covering use in infant formula for babies under 16 weeks found no safety concern at the permitted maximum levels, but flagged the need for ongoing exposure monitoring for this age group.
Choline and phospholipid content
Lecithin is a significant dietary source of choline, an essential nutrient used in cell membrane construction and nerve signalling. Choline intake in the UK population is below recommended levels for many adults, so lecithin-containing foods contribute positively to intake. This is a nutritional observation, not a safety concern.
Phosphatidylcholine from dietary lecithin is a major source of choline, an essential nutrient; low choline intakes have been associated with liver function changes in controlled studies.
Where it stands with the regulators
Who should be careful
People with a soya allergy should check whether a product uses soya lecithin or an alternative source such as sunflower lecithin. UK law requires the label to say 'soya lecithin' or list 'soya' in bold if the lecithin comes from soya. Sunflower lecithin is not a known major allergen.
The honest read
Lecithin is one of the most widely used food additives and has been part of the human diet in egg yolk and soya for thousands of years. The main live question in food law is not about the additive itself but about its source: soya versus sunflower versus rapeseed. The soya-allergy angle is real and regulated, not theoretical. For the wider population without soya allergy, EFSA's re-evaluation found nothing to act on. The infant-formula data gap EFSA flagged in 2017 was addressed in 2020 with the conclusion that permitted levels are acceptable, though monitoring of exposure in young infants continues.
Related additives
Common questions
Is E322 banned in the UK?
No. E322 is an approved food additive in the UK under assimilated EU Regulation 1333/2008. It appears on the UK FSA's approved-additives list.
Does E322 need to say where it comes from on the label?
Yes, if it comes from soya. Soya is one of the 14 major allergens under UK food law, so 'soya lecithin' must appear on the label when soya is the source. If it comes from sunflower or rapeseed, no source declaration is legally required, though some manufacturers include it voluntarily.
What foods contain E322?
Chocolate is the most common source, followed by margarine, low-fat spreads, mayonnaise, salad dressings, bread, baked goods, and infant formula. It appears as 'lecithin', 'soya lecithin', 'sunflower lecithin', or 'E322' on ingredient labels.
Is E322 vegan?
It depends on the source. Plant-derived lecithin (soya, sunflower, rapeseed) is vegan. Egg-yolk lecithin is not vegan, though it is vegetarian. Most commercial food-grade lecithin today is from soya or sunflower. Check the label or contact the manufacturer if the source matters to you.
Sources
- Approved additives and E numbers, UK Food Standards Agency
- Re-evaluation of lecithins (E322) as a food additive, EFSA ANS Panel, EFSA Journal 2017
- Opinion on the re-evaluation of lecithins (E322) for infants below 16 weeks, EFSA ANS Panel, EFSA Journal 2020
- FSA update on soya lecithin investigation, Food Standards Agency
- Food allergen labelling and information requirements technical guidance, FSA
Aaron Keen is the founder of NutraSafe. He researches and writes every additive entry himself, from the primary sources. About the research →
This is a guide, not medical advice. If an additive affects you, speak to your GP or a dietitian.
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