I read an interesting piece about Brighton Gin sometime ago. It was suggested that Milk Thistle (one of the novel botanicals disclosed) was included because the plant itself contains silymarin, a compound reputed to have beneficial effects on the liver. WebMD says the jury’s out, while academic articles seem to indicate there’s some potential there that is being looked at further. The compound itself isn’t soluble in water, but it is soluble in ethanol. Meaning at higher proofs, you’ll get more of it. [solubility is the factor at play when the Ouzo effect/Louche occurs in higher proof spirits, the addition of water causes certain compounds to come out of solution].
But more romantically, the gin itself is distilled in a pub in Brighton.