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I’ll say this upfront: no smoothie burns fat while you sit there drinking it. What this smoothie actually does is keep you full, cut down on mindless snacking, and make it easier to stick with your goals — which, over weeks and months, is what actually transforms the bod.

I crafted this fat-burning smoothie around a few ingredient combos that show real research support for fullness and blood sugar, then made sure it actually tastes good enough that I’d drink it often. That’s the whole strategy. If your goal this season is to slim down, start here — this recipe is one of our top-rated weight loss smoothies.

Fat-burning smoothie in a mason jar on table with cut up celery, kale and grapefruit.

Ingredients in Fat-Burning Smoothie

  • Kale: the fiber and bulk in this smoothie — barely tastes like anything once it’s blended with the fruit.
  • Cucumber + celery: mostly water, so they stretch the smoothie into a bigger, more filling glass without adding many calories.
  • Chia seeds: they swell up and thicken the smoothie, plus add a bit of staying power between the fiber and plant-based fat.
  • Grapefruit: brings natural sweetness and the fullness benefit noted above. Removing the inner membrane before blending cuts most of the bitterness.
  • Green tea: swapped in for plain water as the liquid base, so you get a little natural caffeine along with the antioxidants.
  • Pineapple: balances out the grapefruit’s tartness and makes the whole thing taste more like a treat than a health food.
  • Protein powder: added at the end so it blends without turning gritty — this is what turns the smoothie into something that holds you until lunch instead of an hour.

More Ingredient Combos

  • Cacao + almonds: cacao’s flavanols are an active research area (including work published in BMJ) — and more importantly, chocolate that’s actually good for you makes a routine you’ll keep.
  • Oats + blueberries: oats are the fiber workhorse of this whole list. The blueberry belly-fat study you may have seen was done in rats — promising, not proof — but berries + oats is a fullness combo I’d bet on regardless.

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Jen Hansard blending weight loss smoothies in her kitchen on concrete countertop.

How to Make Fat-Burning Smoothie

Of all the recipes I’ve created, this is the one I come back to: greens, fiber, and superfoods that curb my cravings and keep me energized until lunch. Five minutes, one blender — here’s how:

  1. Fill your blender with kale, cucumber, celery, chia seeds, grapefruit and chilled green tea.
  2. Puree until smooth.
  3. Add frozen pineapple. Remove the grapefruit’s inner membrane to cut bitterness — or swap in orange + lemon.
  4. Blend on high speed until combined (about 30 seconds).
  5. Add one serving protein powder and blend on low speed just to mix.
  6. Pour into a glass and serve chilled.

Common Questions

Can I make this ahead of time?

It’s best fresh, but you can store it in an airtight container in the fridge for a few hours. Give it a good shake before drinking since the chia seeds will settle.

Can I skip the protein powder?

Yes, though it won’t hold you as long. If you skip it, consider adding a spoonful of nut butter or extra chia seeds for staying power instead.

What can I use instead of grapefruit?

Orange and lemon together give you a similar tart-sweet balance without the bitterness, if grapefruit isn’t your thing.

Glass of fat-burning smoothie surrounded by fruits and vegetables.
4.55 (261)

Fat-Burning Smoothie

Jen Hansard
This fat-burning smoothie blends sweet pineapple with fiber-rich kale and celery to satisfy your tastebuds, promote fullness and help boost your metabolism.
Serves: 1
Prep Time: 3 minutes
Blend: 2 minutes
Total Time: 5 minutes

Video

Ingredients 

  • 1 cup kale
  • 1 cucumber chopped
  • 1 tablespoon chia seeds
  • ½ grapefruit peeled and seeded
  • 1 stalk celery chopped
  • ½ cup green tea chilled
  • 1 cup pineapple frozen
  • 1 serving whey protein isolate

Instructions 

  • Place kale, cucumber, chia seeds, grapefruit, celery and green tea into blender.
  • Puree on high-speed until smooth.
  • Add frozen pineapple to blender. Blend again on high-speed until everything is pureed.
  • Add one serving protein powder and blend on low.
  • Pour into a glass and enjoy!
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Recipe Notes

  • On medication? Grapefruit interacts with some prescriptions — swap in orange or clementine
  • Pith power: The pith and peel of the grapefruit are extremely bitter but are beneficial in small amounts. To lessen the bitterness of the grapefruit, remove the fruit from the inner membranes as well as peel before using.
  • Vegan? Swap whey protein with homemade protein powder or preferred powder.
  • Prep ahead: chop the kale, cucumber, and celery and freeze in a bag so this comes together even faster on busy mornings.
  • Adjust the tartness: if grapefruit is too bitter for you even after removing the membrane, start with half a grapefruit and add more to taste.
  • Serve it cold: this one’s best straight after blending, over ice if you like it extra chilled — the texture gets watery if it sits too long.

Nutrition

Serving: 16 oz | Calories: 344 kcal | Carbohydrates: 49 g | Protein: 32 g | Fat: 5 g | Saturated Fat: 1 g | Polyunsaturated Fat: 3 g | Monounsaturated Fat: 0.4 g | Trans Fat: 0.02 g | Sodium: 213 mg | Potassium: 1067 mg | Fiber: 12 g | Sugar: 30 g | Vitamin A: 4068 IU | Vitamin C: 149 mg | Calcium: 317 mg | Iron: 3 mg

Dietary Adjustments & Substitutions

Need to swap an ingredient or accommodate a food allergy? Click the button below for tailored suggestions just for you:

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About the Author

Jen Hansard

I’m the mom who swapped Lucky Charms for green smoothies— and never looked back. Here you’ll find smoothie recipes and plant-based recipes made simple and tasty.

4.55 from 261 votes (70 ratings without comment)

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Comments

  1. 5 stars
    Please can u give me good meal plan because I don’t do exercises and need to loose alot of weight …thank u

    1. Hi Noor! Instead of pineapple, you can use oranges, mangoes or peaches. Happy blending! 🙂

  2. Hi there
    I wanted to see what kind of green tea to use ? I have one that is organic it’s oolong green tea

    1. Hi Maria! I think really any green tea will do so def use the one you already have. 🙂

  3. Will anything help me lose weight at 52 years old? Green smoothies almost daily, low carb, walking 4 times a week and barely any sweets. I’m so depressed every time I look in the mirror. I look gross. Bloodwork all normal and I’m at loss as to how to look good again. Can you help

    1. Hey Colette! Sounds like you’re doing a lot of positive things, like drinking your daily green smoothie and getting outside and moving your body. If you feel this just isn’t enough for you, I’d suggest speaking with your healthcare provider, who may be able to offer some good advice and recommendations. And it’s ok to feel upset that you maybe don’t look like you used to but remember to be kind to yourself. We are cheering for you! 🙂

    2. Collete, you seem to be doing right telling from her lab work. From age ,50 weight loss is an uphill task. It could be that Collete has big frame which explains her weight persistence. Please focus on the positive things in you. Compare your photos at different age and appreciate the difference. Ignore negative comments from people. Manage stress well, lastly say positive things to yourself daily . All the best.

    3. I’d recommend adding daily sessions of breathwork which works the whole body and redistributes the energy. This helps detoxify the body and raise metabolism. I recommend the breathwork found in Kundalini yoga.

      But I agree with the other two responses, be kind to yourself, stay positive, and take it one day at a time.

  4. 5 stars
    This sounds amazing. I haven’t actually tried it yet. I have a thyroid condition for which I take thyroid supplements. I’m not supposed to have any grapefruit, so what do you recommend as a substitution?

    1. Kathy, you could sub clementines, an orange, or a tangerine.