Sons Strengthening Shampoo - Saw Palmetto and Caffeine 200ml Serenoa repens (saw palmetto) may help to decrease the effects of androgenetic alopecia, Argan oil - Hydrates and protects hair against oxidative stress. Niacinamide may help to enhance hair growth via prevention of hair follicle entry into premature catagen phase (follicle shrinkage), Argan oil exhibits antioxidant properties6, and may therefore help to protect hair from the harmful effects of oxidative stress/oxidation on hair structure