Healthy foodies may agree on many nutrition topics, but here's one that's still up for debate: What's better, smoothies or juices? In my opinion there are pros and cons to each drink, so it really comes down to your personal needs and goals. To figure out which one is right for you (regardless of what your friends, coworkers, or favorite celebs are sipping), here’s the lowdown on each beverage.
Smoothies are generally a blend of whole foods, which means you’re keeping all the nutrients from your fruits and veggies intact. Another big benefit to smoothies is the ability to add in extra-nutritious ingredients. For example, you can pump up the protein by adding Greek yogurt, a pulse, or a powder. You can also toss in a healthy fat, in the form of avocado, chia seeds, or almond butter. And you can blend in plenty of other superfood ingredients for an even broader spectrum of nutrients, like fresh grated ginger, matcha or cacao powder, fresh mint, and cinnamon (for more ideas check out my story on nutrition boosters). The nutritional balance of a smoothie is what can make it a legit meal replacement or post-workout recovery drink.
If you make a smoothie with only produce, or a lot of it, you’ll likely wind up consuming far more servings of fruits and veggies than you would normally eat in one sitting. While this might seem like a good thing, it can actually mean gulping down more calories than you can burn, which might prevent weight loss or even lead to weight gain. I’ve also seen this happen to clients who drink a smoothie with a meal, rather than as a meal. Unknowingly, they're consuming two meals at once; one is just disguised as a beverage. Case in point: I recently had a client who wasn’t seeing weight loss results despite eating healthfully and working out. One of the culprits I discovered was the 400-calorie smoothie he whipped up every morning, along with a bowl of oatmeal or veggie omelet.
Many of my clients love veggies, and have no problem fitting plenty of them in their diets. But I also work with people who can go days without eating anything green, or who take very little time to stop and eat meals. For them, juicing is a great way to fill a serious nutrition gap. For example, one of my clients strongly dislikes veggies, but he will drink a daily green juice, mixed with apple and ginger to make the taste more appealing. And for many of my professional athlete clients with hectic schedules, consuming their produce in liquid form allows them to get the amount they need per day. Finally, because juices are so concentrated, a small portion can provide the nutrient equivalent of several serving of fruits and veggies, which can make it much easier to take in all the key vitamins and minerals your body needs.
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Proper juicing generally extracts nutrients, but leaves the fiber behind. This makes juices less filling than smoothies or whole fruit. By nixing fiber, you also miss out on some important nutrients and gut health benefits. What's more, when juices are made with fruit or high sugar veggies (like beets and carrots), you may experience a blood sugar spike, particularly if you don't consume any food at the same time. And when juices contain more fruits than veggies, they can pack far more carbs than you might expect—up to 40 grams in a 16-ounce serving. Bottom line: If you’re drinking juice to fit in servings of produce you might otherwise skip, that’s great—just be mindful of exactly what's in your juice and how much you're drinking. But if your meals and snacks are already filled with veggies and fruits, you're probably eating enough produce to get your fill.
Cynthia Sass is a nutritionist and registered dietitian with master’s degrees in both nutrition science and public health. Frequently seen on national TV, she’s Health’s contributing nutrition editor, and privately counsels clients in New York, Los Angeles, and long distance. Cynthia is currently the sports nutrition consultant to the New York Yankees, previously consulted for three other professional sports teams, and is board certified as a specialist in sports dietetics. Sass is a three-time New York Times best-selling author, and her newest book is “Slim Down Now: Shed Pounds and Inches with Real Food, Real Fast.”