The 32-year-old mother of one is maintaining a plant-based diet by cutting out gluten, dairy and soy from the diet since last three weeks, reported E! online.
Beyonce also posted a vegan protein bar with banana slices on her Instagram account with the caption, '22 days vegan'.
The songstress recently showed off her svelte figure at the Grammys during her performance of 'Drunk in Love' with the rapper husband in a revealing black leotard that flaunted her curves.