I say In-sy-lin. With the s and y elided and the y pronounced as a schwa. (no, I’m not really studying linguistics at the moment, honest…)
My brother lives in la-la land (with fluffy pink clouds and money that grows on trees, dont you know), so I cant get on with la-la juice.
I’d go for something more descriptive – sugar killer? Glucocide fluid? Or how about Island juice, in honor of the Islets of Langerhans?
“Island juice” sounds like something that comes in a glass with umbrellas and is sold for exorbitant amounts of money to the trendies !
I say “in-sh-lin”. I tried to think of it as “Sugar Killer” but found that it made me start singing “psycho killer” (Talking Heads) but with sugar as the first word.
Maybe “hyper killer” ? but that still leads back to the same song !