E322

Lecithin (Soy Lecithin, Sunflower Lecithin)

Last reviewed: 11 May 2026

Plant-derived emulsifier used in nearly every UK chocolate bar.

What is E322 (Lecithin)?

E322 is lecithin, a mixture of fatty substances called phospholipids found naturally in plant and animal tissues.

Main Component:

• Phosphatidylcholine (PC) – 20-90% of lecithin
• Essential for all cell membranes in your body
• Particularly important for brain and nerve cells

Sources of Commercial Lecithin:

1. Soy Lecithin (Most Common):

• Extracted from soybean oil
• 95% of lecithin in processed foods is from soy
• Cheapest option
• GMO concern: Often from genetically modified soybeans (see below)

2. Sunflower Lecithin:

• Extracted from sunflower seeds
• Non-GMO – sunflowers aren't genetically modified
• Allergen-free – no soy allergens
• More expensive than soy lecithin

3. Egg Lecithin:

• Extracted from egg yolks
• Highest quality, richest in phosphatidylcholine
• Expensive – mainly used in supplements

4. Rapeseed Lecithin:

• From rapeseed (canola) oil
• Less common

Why Lecithin is Used:

• Emulsifier – mixes oil and water (e.g., chocolate smoothness)
• Prevents separation – keeps ingredients blended
• Improves texture – creates creamy mouthfeel
• Extends shelf life – stabilizes products
• Non-stick agent – baking sprays

Where is Lecithin Found?

Chocolate & Confectionery (Very Common):

• All chocolate bars – keeps cocoa butter and cocoa solids mixed
• Chocolate chips
• Truffles and pralines
• Compound chocolate

Why chocolate needs lecithin: Without it, chocolate would be grainy and separate.

Baked Goods:

• Cakes and muffins – improves rise and texture
• Biscuits
• Bread (some brands)
• Pancake/waffle mixes

Dairy & Spreads:

• Margarine – essential emulsifier
• Ice cream
• Instant puddings
• Whipped cream

Processed Foods:

• Mayonnaise and salad dressings
• Sauces and gravies
• Instant soups
• Protein bars and shakes

Supplements:

• Lecithin granules (sold as brain/liver supplement)
• Phosphatidylcholine capsules
• Memory supplements

Non-Food Uses:

• Cooking spray (Pam, etc.)
• Cosmetics (moisturizers, lipsticks)
• Paints and inks

What the science shows

Regulatory position

EFSA's 2017 re-evaluation set no numerical ADI for lecithins (E322), reflecting the absence of toxicity signals at dietary doses. The FDA classifies lecithin as Generally Recognized As Safe (GRAS) for use as an emulsifier.

Soy lecithin and soy allergy

Soy allergy is a reaction to soy proteins. Lecithin is a phospholipid extracted from soybean oil — the protein content of refined soy lecithin is very low (typically <100 ppm). The published clinical position is that most people with diagnosed soy allergy tolerate soy lecithin, but there are documented case reports of reactions in people with severe allergy, and the standard cautious advice from allergy clinicians is to discuss it with a specialist. Sunflower lecithin is the standard substitute on UK labels for soy-allergic consumers.

GMO soy lecithin

Most soy lecithin on the UK market is sourced from genetically modified soybeans grown in the Americas. The extraction process removes intact DNA, so the lecithin itself is not "GMO" in the genetic-material sense — but if avoiding products derived from GM crops is your preference, sunflower lecithin or organic soy lecithin are the alternatives.

Digestive effects

At supplement-scale doses (typically >5g/day) some people report bloating, nausea or loose stools. Typical food doses are an order of magnitude below this and don't usually produce digestive effects.

The TMAO question

Recent research has flagged that gut bacteria metabolise dietary phosphatidylcholine (the main component of lecithin) to trimethylamine (TMA), which the liver then oxidises to trimethylamine-N-oxide (TMAO). TMAO has been correlated in observational cohorts with cardiovascular risk. The clinical significance of this pathway under typical dietary intake — including the trace lecithin in a chocolate bar — is unsettled; most of the TMAO signal in human studies comes from animal-product dietary patterns rather than lecithin as a food additive specifically. We mention it because it's the most discussed open question on phospholipid emulsifiers in the current literature; we don't draw a conclusion from it.

Brain, liver and cholesterol claims

Lecithin and choline are commonly sold as supplements with claims around memory, fatty-liver support and cholesterol reduction. The evidence at supplement doses is mixed; at the milligram-scale doses present in food as the E322 emulsifier, no meaningful effect should be expected in either direction. The choline content of food lecithin is small compared with dietary choline from eggs, fish or meat.

Where lecithin fits in the wider emulsifier picture

Other commonly used emulsifiers on UK labels include:

• E471 — mono- and diglycerides of fatty acids — chemically modified fats, also approved
• E433 — polysorbate 80 — synthetic emulsifier; recent research has raised gut-microbiome questions
• E472e — DATEM — common in industrial bread doughs

Each has its own evidence base; we don't rank them against each other on this page.

Regulatory status

UK / EU: approved with no numerical ADI (EFSA 2017).

US: FDA classifies lecithin as Generally Recognized As Safe (GRAS).

Organic foods: permitted in organic products under retained UK organic regulations.

Reading a UK label

Look for "E322", "lecithins", "soya lecithin", "sunflower lecithin" or simply "emulsifier" in the ingredient list. Nearly every chocolate bar carries it. Where soy avoidance matters, the label should clarify the source.

Last updated: 11 May 2026