For a spicy cool treat, try this Italian-food-inspired smoothie recipe. Call this recipe the V-6 if you like, since it contains six healthy ingredients to rev up your day. Try this smoothie in the morning before work, and start your day off right. Use herbs in smoothies whenever possible! They almost always contain large amounts of super-nutrients in just a small portion. Oregano is an excellent source of vitamin K, a very good source of iron and calcium, and a good source of vitamin E and the amino acid tryptophan. Oregano has been shown to inhibit bacterial growth and is used in place of antibiotics by natural healers.