Never. But hair breakage is rarely about what you're applying to it topically, as in shampoos & conditioners. Try taking biotin tablets or capsules, as well as flax seed oil capsules & hyaluronic acid capsules. I started doing this a couple of months ago & have noticed quite a difference, although my hair had gotten much healthier after I stopped washing it altogether. The reason I started is because when we adopted our dog over a year ago, I started grinding up fresh flax seeds in our coffee grinder & adding a tablespoon of this to his food at every meal. His fur was thin at the time as he was found as a stray. He now has the thickest, softest fur I've ever felt on a dog. Everybody who touches him always notices this as well and asks what we feed him. His dry food, rice, chicken & ground flax seeds. That's it. You can add flax seeds to smoothies as well, but be sure to grind them finely first. Otherwise they pass through your digestive system whole, rending the oils in them useless. In addition, store your flax seeds in your freezer to keep them from going rancid. Just grind enough for a week at a time & store them in a ziplock bag in the fridge. Use a couple of heaping tablespoons in each smoothie. It's amazing stuff for the skin as well. If that's too much work, just buy the bottles of oil or the capsules. Keep those in your fridge as well. You can also massage castor oil into your scalp before you go to bed, roll it into a knot & wash it out the next morning. I then apply just a little bit more as a smoother after blow drying while my hair is still warm. It keeps my hair in really good condition. Wish I would've known to do this years ago when I was keeping my hair platinum blonde. It really destroyed my hair at the time.