Thank you for getting in touch about our Pantene Pro-V Miracles Miracle Bond Repair Shampoo and Conditioner with Keratin and Vitamin E. It upsets us greatly to hear that your hair became extremely dry, brittle, and that you also experienced some hair breakage and loss. That's definitely not the kind of news we want to hear from any of our consumers and we understand how devastating this may be. We appreciate your concern and want to assure you that our hair care products do not cause or speed up hair loss. A great deal of work has gone into the development and testing of all our products to ensure they are safe for use. Additionally, we have extensive quality controls in place and our products are used by millions of people every year. Hair loss is normal and is a continuous process. Hair goes through a natural cycle of growth where each hair grows long, falls out, and is replaced by a new hair. If you are noticing a significant amount of hair loss, we recommend speaking to your doctor. Also, it may help to know that hair being dry is usually a sign of your hair not being conditioned well enough. There's a chance that the product used just wasn't rich enough for your hair type. For a better experience, you may want to consider using a richer conditioner. We recommend trying a hair mask or treatment and applying it 2 or 3 times a week to help with excess dryness and damage. We'd like to collect some additional details about your experience. Please give us a call at (800) 945-7768 or email us through our Contact Us Page so we can better assist you.