The shampoo that will work the best for you will depend on your hair and scalp situation. If you have a 'regular/oily' hair and scalp type, then shampoo A is probably your best solution. If your scalp is really very oily, you may even want to consider reducing the amount of oil in the recipe (more advice on this in other FAQ in this help widget ;) If your scalp is on the dry and extra sensitive side, then shampoo B will be great for you as it is very mild and will help wash your hair without irritating your skin further. The most important is to try the formulation as we recommend it, take note in your workbook and then improve the recipe based on your observations. We'll have a mission to help you analyse your shampoo and make it amazing for your unique needs!