Bulletproof coffee, which has high-profile fans in Hollywood, Silicon Valley and in the sporting world, is one of the latest beverage trends to catch on here.
Popular with health nuts, it is simply black coffee with a knob of unsalted butter - similar to the kopi gu you (butter coffee) we have here - laced with a special ingredient: medium-chain triglyceride (MCT) oil.
Bulletproof coffee is said to increase metabolism both in the body and the brain, thanks to the MCT oils.
Found in largest quantities in coconut oil - up to 60 per cent - MCTs can also be found in palm kernel oil, breast milk, cow and goat milk, said Dr Daniel Wai, an endocrinologist in private practice.
You may want to read:
1) Despite lack of evidence on benefits, local demand for coconut oil shows no signs of abating
2) Bulletproof Coffee review: does it really work?