'I tried 'bulletproof coffee' weight loss hack -piling butter into my brew was wild'; 'Bulletproof coffee' is said to help aid weight loss and boost metabolism. The high-fat, low-carb drink is a controversial mix but Mirror writer Niamh Kirk braved a taste after digging into the science behind it

Byline: By, Niamh Kirk If you're looking to lose weight, butter is probably the last ingredient you'd turn to for a boost -but you may be missing a trick. We're [...]