Is the Drug-Detecting Fingernail Polish in ‘Stay Close’ Real?

At the opening of Episode 2 of Stay Close, we see Bea and Kayleigh sneak out of the house, following Megan to Vipers where they run into Carlton. The man attempts to woo the girls, giving Kayleigh a drink.

Being suspicious of Carlton’s motives, Bea sticks her finger into Kayleigh’s drink. That’s when her fingernail polish changes colors, indicating that her drink had indeed been spiked. (Naturally, Bea’s reaction is to switch Carlton and Kayleigh’s drinks, forcing him to drug himself before the pair steal his car.)

Source: https://www.distractify.com/p/stay-close-fingernail-polish-real