A new diet book claims that the secret to staying slim is eating like a cave woman by sticking to foods that our ancestors could 'catch, pluck, or dig up'. 

In Cavewomen Don't Get Fat: Ancient Secrets to Rapid Weight Loss, author Esther Blum introduces  a paleo-based eating plan with a twist - which she calls  'Paleo Chic' - and it's not exactly vegetarian-friendly. 

'Gorgeous girls eat meat,' she said on The Today Show, explaining that carnivorous snacks are key to 'raising dopamine and seratonin levels in the brain' and 'getting a lean, healthy body.' 

Read more here from The Today Show