millcreek does test all their fo's in their soy. i'm a pick up customer and neighbor so i know this personally. their oils all throw great in 100% soy. i highly recommand chestnuts & brown sugar, pink sugar, passionalte kisses, amber romance, lilac, honeysuckle, clothesline fresh & seaside will run you out of the house, frosted carrot cake you can smell the creamcheese frosting, butt-naked smells like cherries best seller, christmas eve & splendor will rename to use year around, orange clove is very stronge with no fuel smell, butter pecan great. oh that enough all of them are great.