Millions of Britons are failing to declare their weight loss injections to insurers, which in turn could land them with huge bills if they fall ill abroad. Now those using the jabs are being warned that if they plan to go on holiday, they're at risk of invalidating all-important travel cover. Millions of travellers could be at risk of large insurance bills if they fail to declare injectionsAny traveller who takes out insurance must declare pre-existing conditions and medication. This is Money previously warned that failing to declare weight-loss jab usage and any associated health conditions may mean your insurer refuses to pay out if you make a claim. Staysure claims data reveals between January and May, medical treatment and repatriation claims from the US surpassed £371,000, while India topped £263,000 – including one claim of £128,336.