Lemon-Aid: Great for three things

a.) Priming a pink or purple brow before coating with the desired colour in order to turn it brown
b.) Excellent for blending into a desired pigment if a slightly lighter shade is desired
c.) By itself over a healed procedure if the colour you used is too dark. The client will leave with her brows looking slightly yellow, but they will not stay that way. In a few days the colour of the brows will not appear yellow, but they will be one or two shades lighter.
 
Lemon Aid: This is best for correcting purple, pink, blue, or dark gray eyebrows. Great for the client who has multiple colors on the brows. Lemon aid will help even out and neutralize the unwanted colors and prepare it for new pigment.