Tomatoes contribute to bone health and help keep your blood vessels flexible with nearly 18 percent of your daily requirement of vitamin K in each cupful. Vitamin K deficiency, although not very common, may be a side effect of long-term use of antibiotics and can be characterized by skin bruising. Vitamin K is stored in the fatty tissue in your body and helps to anchor the calcium in your bones. It's also a clotting agent [source: Westfall].
If tomatoes aren't your favorite vegetable, other good sources of vitamin K are spinach, cabbage, broccoli, soy, Swiss chard, collard greens, green onion and parsley.