3 bottles to let go as I'm switching brand 1 for $13 What it is: A gentle cleansing shampoo that supports hair growth and promotes hair thickness and strength. What it is formulated to do: This strengthening shampoo features the power of quinine to support the strength of hair keratin for visible thickness and manageability. It cleanses gently while restoring vitality to thin or lifeless hair. It also supports natural microcirculation and can be used every day. What it is formulated WITHOUT: - Parabens What else you need to know: The red cinchona is a tree native to South America which can grow up to 65 feet. Its bark, called the “bark of barks,” was used by the Incas as a traditional remedy to stimulate the body and used by Klorane as a source of quinine. This product is silicone-free and cruelty-free.