What are the best smoothies for weight loss?

Smoothies can absolutely be a part of your strategy for healthy, lasting weight loss—if that’s what you’re after—but only when done right.

So before you pull out your blender, you’ll want to read about the common smoothie slip-ups that can mess up your diet, or even lead to weight gain.Top view of three colorful milkshakes or smoothies on a wooden table

Make your smoothies healthier by avoiding these common smoothie mistakes.

Why We Love Smoothies

According to Harvard Health Publishing, smoothies are a useful way to get more fruit and vegetables in your diet (other than, well, eating them).

Unlike juices, they’re usually made from whole fruit and vegetables, so they’re higher in fiber and lower on the glycemic index.

This means less blood sugar highs and lows, which can help control cravings.

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Smoothies are easy to make (apart from cleaning the blender!) or grab and go when you’re out and about.

They’re useful for those days when you have no time for breakfast or have just finished a workout and need a quick refuel.

Not into leafy greens but know you need to eat more?

Try blending them into a fruit smoothie for an easy win.

The sweet taste will offset that of the offending vegetable.

But keep in mind that plenty of vegetables are sweet too.

How to Make Smoothies Healthy

Smoothies can be part of a healthy diet that supports your weight-loss goals — as long as you don’t fall prey to these common smoothie mistakes.

1. Drinking Too Many Calories

Although the mechanism isn’t fully understood, scientists believe that we are more likely to over-consume calories if we drink rather than eat them.

A much-cited August 2004 study in JAMA found that women who consumed sugar-sweetened beverages put on more weight than those who didn’t.

An effect that researchers attribute to the fact that drinks can contain a lot of sugars, yet the body cannot recognize and adjust intake to compensate, as it does when you are full after a solid meal.

The fix: Don’t add too many smoothies to your diet, keep an eye on calories and consider smoothie bowls.

The thicker texture helps your body know that it’s full.

According to the Harvard T. H Chan School of Public Health’s healthy beverage guidelines, smoothies shouldn’t be drunk daily due to their calorie content.

If you’re using it as a meal replacement, a smoothie should contain about 300 to 450 calories.

Stick to 100 to 250 calories for a snack.

Keep in mind that a large, fruit-only smoothie can have over 500 calories.

The fix: Skip fruit juice, since it only adds calories and isn’t needed if you’re using whole fruit. Use water, dairy milk or a milk alternative as your base instead.

When it comes to whole fruit, nutritionists recommend adding no more than 1/2 to 3/4 cup of fruit per serving and rounding out the drink with other ingredients.

3. Not Adding Filling Protein, Fiber or Fat

If you want smoothies to be satisfying and help with weight loss, then there needs to be a balance of slow-digesting carbohydrates, some sort of protein and then some healthy fat and fiber.

Why? Protein and fat help to keep us feeling full and they slow digestion.

Liquids digest more quickly than solids do, so adding some extra fat and protein can help to slow this process down and keep us fuller for longer.

Adding extra protein to your diet may even help you lose weight.

Although a small sample size, a February 2015 study in the journal Nutrition found that women who ate a high-protein breakfast felt fuller and ate less at lunchtime, compared to a low-protein or no breakfast.

Plus, a December 2019 meta-analysis in Advances in Nutrition found that people who are actively cutting calories to lose weight should eat more protein than the average person.

The fix: Aim for 17 to 25 grams of protein per smoothie if you are using one as a meal replacement, 10 to 12 grams for a snack.

Good protein choices include greek yogurt, cottage cheese or white beans and peas.

Or choose from one of the many dairy- or plant-based protein powders protein powders now available.

For fiber, try ground flaxseed, a tablespoon of nuts or some soaked oats.

For fats, good options are a third of an avocado or 1 tablespoon of coconut oil or nut butter.

Many recipes or bottled smoothies include added sweeteners like honey or agave, which only add to the sugar and calorie content without the benefit of extra nutrients.

The fix: The right recipe should be sweet enough!

Call on the natural sugars in fruit when you’re making a smoothie at home and skip the other sweeteners (yes, even the “natural”-sounding ones).

Adding fruit gives you the benefit of filling fiber and other nutrients.

When buying bottled, check the ingredients to make sure there are no added sweeteners.

5. Drinking Them With Meals

If you want to drink a smoothie with a meal, you have to lower the calorie content of the meal to compensate, or you’ll end up consuming much more than you think.

The fix: The best way to enjoy smoothies is as a breakfast replacement or snack, not with a meal.

A lower-calorie smoothie as an afternoon snack would be good, instead of reaching for empty carbs like pretzels or candy.

Healthy Smoothie Recipes to TryEveryday green smoothie in jars

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