Glucono-delta-lactone (GdL), a white crystalline powder, is a dry form of gluconic acid obtained by removing water during crystallisation. When GdL comes in contact with water, it dissolves completely and hydrolyses progressively to gluconic acid, while at the same time reducing the pH-value. Gluconic acid has a mild taste profile, which is why GdL is commonly used as an acidifier in the production of many food categories.GdL is used in silken tofu and white cheese products as a coagulant for soy and milk proteins, in bakery products as sodium and phosphate free leavening acid, in meat products as an alternative to starter cultures for faster curing of rawsausages and in combination with starter cultures for pathogens control and as preservative for ready-to-eat pasta, noodles and rice. In personal care applications, GdL turns out to be a skin-friendly exfoliant as well as a moisturising agent.