The best way to consume watercress is in the fresh, raw form, as the most potent parts of it are present in the fresh juice. How it Tastes: Watercress has a bitter tang to it. It also is quite spicy and hot, making it a popular addition to plain or neutrally flavored foods.ating small amounts of watercress regularly however, can prevent prostate or colon cancer. Other Uses: When the juice of the watercress is applied to the hair and scalp, it can help the hair grow thicker, healthier and more luxuriously. Your ads will be inserted here by. AdSense Now! .