HOW SHOULD I USE THE HAIR SERUM?
Use once a day for best results. If application is discontinued or interrupted for a long period of time, hair quality will eventually return to its normal condition. It is recommended that you wash your hair or brush thoroughly to remove any styling product residue or other buildup from your scalp before use. You need to make sure that the active ingredients will get through to the hair roots.
https://www.m2beaute.com/en/hair-care-faqs/faq-hair-activating-serum/how-should-i-use-the-hair-serum