Oils and fats
Mono and diglycerides
Definition
What it is
Mono and diglycerides: processed emulsifying fats that can legally contain trans fats even in products labeled 0g trans fat; common in commercial bread.
On the label
Label names covered by this flag
- mono and diglycerides
- monoglycerides
- diglycerides
- mono- and diglycerides
- acetylated monoglycerides
- acetylated mono and diglycerides
Regulation
Regulatory status
No bans or restrictions are recorded for this ingredient in the jurisdictions clearlabel tracks (US, EU, UK, Canada, Japan, Australia/NZ, Brazil).
Explainer
In plain language
Mono and diglycerides are emulsifiers made from fats and oils, either plant or animal in origin. They help oil and water stay mixed, keep bread soft for longer, and give margarine, ice cream, and baked goods a smooth, even texture. They are processed from fats through a reaction called glycerolysis, which is why they sit in the oils and fats category rather than being a whole-food ingredient.
Assessment
Why it is flagged
The main transparency issue is trans fat. When the FDA moved to remove partially hydrogenated oils from the food supply, mono and diglycerides were treated as emulsifiers rather than as a fat source, so they were not covered by the same rules. Because they can be made from partially hydrogenated oils, a product can contain small amounts of trans fat from this ingredient while still legally listing '0g trans fat' when the amount per serving falls below the rounding threshold. That is a labeling gap rather than a proven harm at typical intakes, and the fats themselves are widely permitted. Clear Label flags them so that this hidden fat source is visible, especially for people watching trans fat closely.
In the aisle
Where it commonly shows up
- Commercial breads and buns
- Packaged cakes, muffins, and snack cakes
- Margarine and spreads
- Ice cream and frozen desserts
- Coffee creamers
- Peanut butter and nut spreads
- Whipped toppings
Practical
Reading the label
They appear as mono and diglycerides, monoglycerides, diglycerides, or the acetylated versions. A '0g trans fat' claim on the front of a package does not rule out small amounts contributed by this ingredient, so checking the ingredient list matters more than the front label here.
Alternatives
If you want to avoid it
Some people choose breads and baked goods with shorter ingredient lists that rely on oil, butter, or lecithin instead. Comparing two loaves side by side often shows which ones skip added emulsifiers.
FAQ
Common questions
Do mono and diglycerides contain trans fat?
They can, depending on the fat they are made from. Because they are classified as emulsifiers rather than as fats, a product can contain trace trans fat from them and still round down to '0g trans fat' per serving on the label.
Are they vegetarian or vegan?
It depends on the source fat, which can be plant or animal derived. The label rarely says which, so people avoiding animal ingredients often contact the manufacturer or choose products that state a plant source.
Are they banned anywhere?
No. Mono and diglycerides are broadly permitted as food additives in the US, EU, and other major markets. The concern Clear Label tracks is labeling transparency around trans fat, not a ban.
Citations
Sources
Citation
Primary reference
About this page: the definition, label names, severity, and regulatory chips come from the clearlabel ingredient taxonomy, the same data the scanner uses to score products. Research summaries describe associations reported in published studies, not diagnoses; individual responses vary. Scan any product with clearlabel to see which of its ingredients carry flags.