Adele sparked international interest in her transformation when she posted pictures to her Instagram account with 37.1million number of followers.
Last week, the 32-year-old shared a photo from her birthday party during the lockdown, thanking NHS workers for their hard work and dedication throughout the pandemic.
However, it wasn't the message of thanks that caught fans' attention, as the internet scrambled to get to the bottom of Adele's nutrition plan.
According to The Sun, the Sirtfood Diet is the weight loss regime that helped the Hello singer to lose seven stone over the last few years.