Curious about the difference in "sulfate free" products - and products that list mag sulfate as an ingredient. I just got a BKT and loving it so far. While I want it to last as long as possible, I'm definitely wary of the dangers of SLS. I haven't used shampoo in ages but thought the BKT was a good option for me to continue growing out. My big question is in regards to encouraging a little more curl. Is AG re:coil bad for BKT as it contains mag sulfate??? I have some and would live to use it but not if it will ruin an expensive treatment.