The latest coffee trend is adding butter to your blend. Anyone for a ‘fat black'?
It’s already big news in the US and "bulletproof" (or paleo) coffee is on its way to a café near you (if it hasn't already). That’s a mix of coffee, butter and oil, don't you know.
Yes, it has an oily sheen but it is also said to boost energy, help with weight loss and make you mentally alert, apparently.
Where did it come from? Well, American health guru, Dave Asprey, who learned about the "power of butter" in Tibet.
Writing on his website, he says that the coffee combo will give you energy for "six hours if you need it," helps the body to "burn fat for energy all day long" and "improves cognitive function."
However, nutritionists argue that the underlying science is a tad shaky. Sian Porter, a spokeswoman for the British Dietetic Association, told The Telegraph: “He has done one of the classic things that fad diets do by saying he has looked at thousands of studies. But it is about quality not quantity.”
Dr Sally Norton, NHS surgeon and UK weigh-loss consultant, added: “There is no science that would back this up as a weight-loss tool.”
Maybe we'll save our butter for some toasted crumpets then. Mmm.