How to Use Grandhair Hair Serum 1-Apply Grandhair hair serum to the areas with gaps. 2-After applying it to the areas with gaps, mix it in thoroughly with the help of massage. 3-A slight burning sensation may be felt during the massage process, this is normal. It should be left on the scalp for 30 minutes! After application, it is recommended to wait 30 minutes for the product to penetrate the scalp, then you can preferably wash it. In Which Situations Should Grandhair Be Used? *It can be used to prevent hair loss in case of hair loss. *Recommended to reactivate hair follicles in case of baldness. *Helps to regain hair more thickly and thickly.