I use UBH and deep condition every time I wash my hair. I occasionally substitute LeKair Cholesterol for it, but otherwise UBH is my staple. Unless I misunderstood her book, I believe Cathy recommends deep conditioning after each wash. I wouldn't recommend pure protein deep conditioning that often, but since UBH is also a moisturizer, as is Aubrey Organics GPB, I believe you can use as often as you like. Or should I say, I do and I haven't had any problems. Oh and I wash my hair twice a week, BTW.