Previous clinical studies suggested that - when combined with changes to their diet, exercise and behavioural support - Wegovy users could lose more than 10% of their body weight after a year on the treatment. Other trials also suggested Mounjaro users might lose up to a fifth of their weight.

Women also reminded that they should use the most effective contraception to avoid pregnancy while taking 'skinny jabs'.

Ozempic, which was introduced into the UK in January 2019, having previously been approved in the US in 2017, is an injectable prescription drug. Ozempic and Mounjaro are used to manage sugar levels of diabetes patients. Weight loss is a side-effect, which has caused it to surge in popularity.