If you love the idea of a no-effort tan and have a good sense of humor about accidental orange sweat, go for it. They’re fun in a “what’s the worst that can happen?” kind of way. Just remember: you are not a flamingo, and your under-tongue area is not a tanning bed.
But seriously, as someone who has tried it, I’d say it’s a novel trick for the drawer of “useless-to-useful” beauty tools. It’s like having a secret weapon you can whip out when you want to look like you had a great weekend. Just don’t overdose, and certainly don’t hand them to your overly eager brother.
In the end, tanning drops under the tongue remind us that beauty is weird, wonderful, and often a little bit silly. They’re a quick fix for a natural look that’s about as natural as a unicorn. But hey, if that helps you feel good while making your friends laugh, that’s a win-win.