Audace pH Performance (Shampoo, German formula)
One of the best shampoos I have ever used. It is imported, so it can be considered quite expensive compared to other brands. (current price in Singapore dollars: S$8.94, at time of posting)
It is mild enough to be used for those whose hair require tender treatment, yet strong enough to thoroughly clean one's hair. "Mild" shampoos are suitable for those who find that they are experiencing excessive hair loss or hair falling out (due to work-related stress, diet etc).
I would recommend this product to those who find the above features of this shampoo useful.