Glucono delta-lactone (GDL) is a naturally-occurring food additive (E575),

used as a sequestrant, a slow release-acidifier, or a curing, pickling, or leavening agent.

GDL is a white odorless crystalline powder,

For TOFU :

 GDL is an important ingredient in the manufacture of silken TOFU : dosage 0.3% to 0.5 %

add 3 to 5 grams ( 1 teaspoon) of GDL as coagulant / liter of soy milk.

Also used in baking as "self raising" in combination with sodium bicarbonate, and used in cheese making.

International buyers could just pay the same shipping cost as U.S. buyer, if you are in the Eligible countries, under the global shipping program of Ebay that we are part of it.