由澱粉衍生的葡萄糖生物發酵產生的天然酸。 檸檬酸廣泛用於化妝品中，用於調節配方中的 pH 值，並具有溫和的螯合特性。 與小蘇打一同使用可製成泡澡球。
 
中國
 
Natural acid produced by biofermentation of glucose derived from starch. Citric acid is widely used in cosmetics to adjust pH in formulations and has mild chelating properties. Used in combination with bicarbonate of soda to make effervescent bath products.
 
China