1. Leafy greens

Having a smoothie based on a leafy green such as kale or spinach is a great way to get your digestive tract going in the morning (TMI, but it's true). Both kale and spinach are high in fiber and water, which will cleanse your gut. Kale is especially great for you because it provides tons of Vitamins (C, K, A, B6) and a bit of protein, too. These leafy greens add the vitamins, calcium, and iron that you probably wouldn't otherwise be getting in your diet. Adding them to a smoothie takes away the pressure of getting leafy greens in during the day, and it's much easier than making a salad. Plus, once you add the other ingredients in the smoothie, you can't even taste the greens! Adding about a handful of greens into your smoothie in the morning can make you feel refreshed, energized, and ready to start the day.

2. Cucumber

Cucumber is a totally underrated smoothie ingredient that not many people think of adding. This vegetable (or fruit, whatever you want to call it) is mostly water, making it super refreshing. It's great for your skin, nails, gut, muscles — everything! It will flush out the toxins in your system while delivering Vitamins A, C, and D, and also fights inflammation. Cucumber is the superfood that you need to add to your smoothie for healthy skin, digestion, and a boost of energy. You can use some of the cucumber as an eye mask, too! It'll take care of those dark circles in no time.

3. Celery

Celery is another vegetable that's underrated in the smoothie realm. Celery is packed with vitamins and minerals, much like kale. It contains vitamins A, C, and K, and is mostly water, which will make the smoothie more hydrating. Adding about 2-3 stalks of celery to the smoothie will help reduce high blood pressure and aid in digestion, too.

4. Avocado

Everyone loves avocados. Avocado toast, avocado in a sandwich, avocado in a salad, avocado on pizza — the possibilities are endless! So why not put it in a smoothie? Avocado is loaded with healthy fats, potassium, and vitamins. I like adding half an avocado to my smoothie, then saving the rest for avocado toast later. It'll make your smoothies creamier, too!