Start Your Weight Loss Journey with Allurion BMI Calculator Swallowable gastric balloon. CHECK YOUR BMI Use our BMI Calculator to see if you're eligible: The Allurion Gastric Balloon Programme may be offered to candidates that meet the following criteria: Aged 18 and above BMI 27 and above Not currently pregnant or breastfeeding Have not had stomach or esophageal surgery BOOK AN APPOINTMENT Find a Clinic The Programme View Page