What it is: Leave-in treatment for thinning hair. What it does: Citrus Flavonoids Ginger Root Netter and Parsley extracts will thicken hair and prevent breakage. Rich on Oleanic acid that helps to fortify and strengthen the hair at the root to prevent thinning and falling hair. What else you need to know: Paraben Free. Concentrating on the roots and scalp spray all through damp or towel dried hair.