“Chinese medicine.” “That weird Hungarian liqueur.” “Something my grandad would drink.” The taste test is not going well. Dry January is over and we’re hitting the bottle, but this is not alcohol we’re drinking. It’s theoretically the next best thing: Sentia Black, “a unique blend of functional botanicals, designed for focus and conviviality,” reads the blurb We’ve been trying it neat, but once you mix it with tonic water it becomes much more palatable – “festive and grownup”, as one of my test subjects puts it. Taste aside, though, does it work? The conversation is certainly free-flowing, but whether it...