Black Jack (Mutsine) – Fights off bacterial and fungal infections and prevents many digestive disorders like acid reflux (nyongo) and bloating. Prevents ulcers. Blackjack is also known for its immense anti-cancer powers. Fiber, antioxidants, plant compounds known as sterols, and different nutrients in blackjack combat cancer at all stages starting from preventing the disease to impeding cancer growth or killing cancer cells. Experts say that the blackjack plant is a good source of vitamin C. It contains 63 milligrams of vitamin C in 100 grams. An adult needs about 75 milligrams to 90 milligrams of vitamin C a day. Vitamin C acts as an antioxidant and also helps your body make collagen, which helps your body heal wounds.