E575: Glucono-Delta-Lactone
Main role: gradual acidification and coagulation
Also listed as: GDL, gluconolactone
What is E575 (Glucono-Delta-Lactone)?
Glucono-delta-lactone is a cyclic form that gradually converts to gluconic acid in water. The controlled acidification can help set tofu or support a raising system without adding a sharp burst of acid immediately.
What does it do in food?
Its main role is gradual acidification and coagulation. Acidity regulators adjust or buffer pH. The resulting acidity depends on the whole recipe, not just the presence of one acid or salt. Acidity control may also affect texture and the performance of other ingredients.
Food and formulation examples
- Tofu coagulation
- Specified baking preparations
- Selected dairy-style gels
These examples describe formulation roles, not a list of unrestricted legal uses. Availability and permitted applications differ by country and food category.
Label names and ingredient questions
Look for E575, E 575, or the ingredient name. Related names and label terms include GDL, gluconolactone. A family code can cover more than one specified form; check the full declaration when the distinction matters.
GDL and citric acid can both acidify a recipe, but they release acidity differently. Tofu made with GDL may therefore set differently from tofu made with calcium or magnesium salts.
Is E575 safe?
There is no meaningful personal risk estimate from an E number alone. Food-grade specifications, allowed uses, amount consumed, and individual circumstances all matter. The authorization record below gives the legal scope; it is not a claim that every possible use is appropriate.
A label identifies the ingredient but usually not its concentration. Calculating daily intake requires the amount in the food and the quantities eaten.
Authorization and conditions of use
The Great Britain food additive register lists E575 as Glucono-delta-lactone. This is an entry subject to its stated conditions, not unrestricted permission for every food. The record links to the applicable authorization terms. For an EU product, use the European Commission food additive database to check the relevant food category and limits. Other countries may use different names or rules.