Anyone who's vaped for any while knows that. It doesn't affect the potency, only perhaps the taste if brown enough. It's still nicotine, though and makes a great pesticide when no longer vapable. Pour it on anthills.
Yeh so y do u think it’s turning brown when reacting w air or light if it’s not due to oxidation.
Also literally every source I’ve found says that it does lose potency. I experienced this when hitting it myself.
Does nicotine juice lose potency over time?
Does Vape Juice Expire?
https://www.reddit.com/r/DIY_eJuice/comments/336gz9/nicotine_oxidizing_why_is_it_bad/