How often you use this product depends on the condition of your hair:
If you have very weak and damaged hair and/or high porosity: then we advise you to use the treatment weekly. Leave it on for a minimum of 30 minutes to an hour.
If you have damaged and weak hair and/or normal porosity: Leave the treatment on for about 20 minutes and use it every 3rd or 4th wash.
If you have lightly damaged and/or weak hair and low porosity: Leave the treatment on for 15 minutes and use it every 4th or 5th wash.
If you don't know how damaged your hair is and/or what porosity you have: leave it on for 20 minutes and use it every 3rd or 4th wash.