Beyonce and Jay-Z are fans, Lewis Hamilton swears by it and perhaps it's the secret to JLo's youthful good looks. These celebs are all fans of a vegan lifestyle. So that's no meat, no eggs, no dairy, no animal product of any kind.
As Veganuary is rapidly becoming a New Year trend - is there something to it? Is it healthier? Or is it just a massive hype?
Today we're joined by Veganuary Co-Founder Matthew Glover who's written a book about how to go vegan. Alongside him we have blogger Julie Bindel who describes vegans as 'humourless, judgemental souls'.
Let us know what you think by voting in our poll above!