Actually no. I purposely add certain fragrances that will turn brown in my gm rebatch. However, when I add an fo like pink sugar the base doesn't not turn colors. I once tested a batch for about two-three months and it still has yet to turn brown. And the base is regular no stabilizer in it. Hmmm wonder why that happened? In my rebatch that pink sugar turned brown immediately and after two weeks got very chocolatety! LOL