Hair and watercress

Watercress is a leafy green cruciferous, and a water plant. It has a plethora of minerals and vitamins that are truly a treasure trove for your hair and scalp. It helps prevent infections that effect dandruff and dry scalp.

Watercress helps hydrate your scalp keeping it healthy and helps prevent hair loss. Not only that, it helps promote hair growth keeping key hormones in balance.

Adding watercress to your daily diet can help cleanse your blood, which in turn improves your body's defense mechanisms. The sulfur and zinc in watercress help encourage hair regrowth. Watercress juice can be used directly on the scalp, hydrating your hair and scalp.

Link to sources: http://www.stylecraze.com/articles/watercress-benefits-for-skin-hair-health/
http://www.healthbenefitstimes.com/health-benefits-of-watercress/