Use coconut oil. Olive oil is costly and in no way more superior. In fact olive oil is known to increase dandruff when applied on scalp. Do not use any oil (vegetable oils) on scalp. Some people have naturally rough hair. A conditioner helps to a certain extent but not completely. I suggest you use the anti dandruff shampoo only for the scalp as it causes dryness when applied to hair. Biotin supplements will help your hair grow thicker and longer and a few of my patients have told me it make their nail and hair more shiny. So you could try that for 3 months. Hope this helps. Warm regards. Dr. Rajdeep Mysore. Chirag Hospital Bangalore