How should I use this shampoo for the best effect on weak or brittle hair?

Apply a small amount to thoroughly wet hair. Focus the massage on the scalp — this is where the burdock, black radish, and inulin interact with the root environment. Leaving the lather on for about a minute gives the arginine, hydrolysed wheat protein, and panthenol time to deposit on the hair shaft before rinsing. Because the formula contains no silicones, the hair may feel less "slippery" while wet; this is normal and does not mean it isn't clean.

For long or heavily heat-styled lengths that tangle easily, follow with a lightweight conditioner or mask on the mid-lengths and ends only. The shampoo is designed for regular use, so daily or every-other-day washing is fine if your scalp tolerates it. Avoid contact with eyes; if it happens, rinse immediately with water.