Lye Water

Lye water is a solution of potassium carbonate or sodium carbonate in water. It is made by dissolving the salts, which are typically derived from ashes of plants like ashwood or seaweed, in water.

Lye water is used in food preparation to increase the pH of doughs and batters, which helps to create a chewy texture and a golden-brown color. It is most commonly found in traditional Asian baked goods like mooncakes and pretzels.

In the United States, lye water (potassium carbonate and sodium carbonate) is generally recognized as safe (GRAS) by the FDA when used for its intended purpose in food. These substances are naturally occurring and are used in small amounts in food. JECFA has evaluated potassium carbonate and sodium carbonate and established acceptable daily intakes. Evidence does not suggest adverse health effects at typical consumption levels.