The Kérastase Genesis Duo if for Dry and Weakened Hair. The Kérastase Genesis Pack for Weakened Hair Genesis Bain Nutri-Fortifiant is an anti hair-fall fortifying shampoo for weakened hair. Enriched with Edelweiss Native Cells, Ginger Root & Aquaxyl this shampoo helps reinforce fibre to reduce the risk of hair fall due to breakage. Provides up to 93.3% less hall fall due to breakage. The Kérastase Genesis Fondant Reinforcatuer is a fortifying anti hair-fall conditioner for weakened hair prone to falling. Enriched with Edelweiss Cells, Ginger Root & Aquaxyl the anti-breakage action helps reinforce the fibres natural resistance. Provides up to 97.7 less hair fall due to breakage. Ingredients For ingredients see individual product descriptions.