I didn't know that it does. I use Oyin Juice & Berries, which contains glycerin all the time, plus other products that have it and I haven't noticed fading. I even color my hair red which fades the easiest.
I do notice that honey fades my color, so I avoid products with honey.
Mostly 3A/Some 3B Thick/Dry/Colored/SL
Loving natural products. Some of my favorites are:
MHC Scalp Cleanser, Donna Marie Miracurl Gelly, Robert Craig Conditioner
I've noticed that the hair color around my forehead fades quickly and I've determined that its the glycerin in my face lotions and cleansers. I'd like to find a hair color that's resistant to the fading-nature of glycerin. Any suggestions?