Following the publication of a scientific study that advised changing to more plant-based meals in order to keep "the food systems within environmental limits", the singer shared a post on Instagram promoting The Greenprint Project — a website linked to a diet book recently published by her trainer Marco Borges, for which her and Jay-Z provided the intro.
"Our Greenprint is the positive impact we can have on the world by eating plant-based meals," explains the site, before giving examples of how this type of diet can help the environment.
There's also the chance to win "Beyoncé and JAY-Z concert tickets for life*" if you sign up. (The asterisk explains that one pair of tickets is available, and "lifetime" means up to a maximum of 30 years.)