What is Liquid Nitrogen in "Chiki Ngebul" and why is it added to food?

8 Diseases caused by Consuming Chiki Bubbles, Turns Out They Contain Liquid Nitrogen

Hazards Of Liquid Nitrogen In Chiki Ngebul, BPOM: Being Swallowed Can Injure The Lambung

West Java Bans Sales of 'Chiki Ngebul' Snacks

Chronology of 28 Children Poisoned with Liquid Nitrogen ‘Chiki Ngebul’ in Tasik and Bekasi

Be Careful Bun, Nitrogen Liquid Consumption Without A Toxic Food Procedure