What smoothie at Smoothie King has the least amount of carbs?

Smoothie King offers a wide variety of smoothies with different ingredients and nutritional profiles. For people monitoring their carb intake, choosing a low-carb smoothie can help keep added sugars and overall carbs low while still providing nutrients from fruits and vegetables.

Quick Answer

The smoothie with the lowest amount of net carbs at Smoothie King is the Slim-N-Trim Strawberry smoothie with only 9g net carbs in a small size.

Smoothie King’s Low-Carb Options

Here are some of the lowest carb smoothie options at Smoothie King:

  • Slim-N-Trim Strawberry: 9g net carbs (small)
  • Gladiator Chocolate: 15g net carbs (small)
  • Strawberry X-Treme: 18g net carbs (small)
  • Lean1 Vanilla: 21g net carbs (small)
  • Island Green: 23g net carbs (small)

Smoothie King categorizes some smoothies as “low-carb” options on their menu. However, carb counts can vary greatly depending on size and ingredients added, so it’s important to check nutrition info for accurate counts.

Factors Affecting Carb Count

The carb count of any Smoothie King smoothie will depend on:

  • Base ingredients: Fruits like bananas and mangos are higher carb than berries and greens.
  • Added sweeteners: Syrups, juices, and added sugars increase carbs.
  • Portion size: Larger sizes mean more carbs.
  • Add-ins: Nuts, seeds, granola, and other mix-ins add carbs.

That’s why it’s important to customize your smoothie and choose low-carb ingredients to keep carbs down.

Best Low-Carb Smoothie Options at Smoothie King

Here is more detail on some of the lowest carb smoothies at Smoothie King and how to modify them to make them keto-friendly or low-glycemic:

Slim-N-Trim Strawberry Smoothie

  • 9g net carbs (small size)
  • Base is strawberries and Gladiator protein blend
  • No added sugars

To make this keto, ask for unsweetened almond milk instead of nonfat milk. Skipping any additional sweeteners keeps carbs low in this smoothie.

Gladiator Chocolate Smoothie

  • 15g net carbs (small size)
  • Blend of whey, soy, and Gladiator plant-based proteins
  • Cocoa and chocolate added

Asking for unsweetened almond milk and avoiding added sweeteners reduces the carb content. Can modify with peanut butter or cocoa powder for flavor and healthy fats.

Strawberry X-Treme Smoothie

  • 18g net carbs (small size)
  • Strawberries, banana, yogurt
  • No added sweeteners

Leaving out the banana significantly reduces carbs. Can use plain, unsweetened Greek yogurt and add chia seeds or flaxmeal for extra nutrition.

Lean1 Vanilla Smoothie

  • 21g net carbs (small size)
  • Soy protein, nonfat milk
  • Vanilla flavor added

Ask for unsweetened almond milk and unflavored protein powder. Add cinnamon for flavor. Can add nut butter or collagen peptides for healthy fats.

Island Green Smoothie

  • 23g net carbs (small size)
  • Spinach, kale, pineapple, banana
  • No added sweeteners

Omit banana and pineapple and increase greens for lower sugar and carbs. Add chia seeds. Use water instead of juice for base.

Smoothies to Avoid on Low-Carb Diets

Here are some of the highest carb smoothies to avoid at Smoothie King if limiting carbs:

  • Caribbean Way Smoothie
  • Angel Food Smoothie
  • Mangitarian Smoothie
  • Vegan Strawberry Smoothie
  • Tropical Tide Smoothie

These all contain fruits and sweeteners that significantly increase carb counts, especially in larger sizes. Stick to green, leafy, low-glycemic veggies as bases instead.

Tips for Ordering Low-Carb Smoothies from Smoothie King

Here are some useful tips for customizing your Smoothie King smoothie order to keep carbs low:

  • Choose low-sugar fruit bases like berries and greens
  • Skip bananas, mangos, pineapples and other high-carb fruits
  • Select unsweetened almond milk or water instead of juice or regular milk
  • Avoid added sugars, syrups, and juices
  • Add healthy fats from nut butters, coconut, avocado, chia or flax
  • Increase protein with collagen peptides, whey protein, or plant-based proteins
  • Ask for no additional sweeteners to be added
  • Opt for the smallest size available
  • Request nutritional info to find lowest carb options

Sample Low-Carb Smoothie King Orders

Here are some examples of keto-friendly low-carb smoothie orders:

Keto Green Smoothie

  • Base: Spinach, kale, cucumber
  • Liquid: Unsweetened almond milk
  • Mix-ins: Chia seeds, collagen peptides, cocoa powder
  • No added sweeteners

Keto Berry Smoothie

  • Base: Mixed berries
  • Liquid: Unsweetened almond milk
  • Mix-ins: Collagen peptides, peanut butter
  • No added sweeteners

Keto Vanilla Smoothie

  • Base: Spinach
  • Liquid: Unsweetened almond milk
  • Mix-ins: Vanilla whey protein, cinnamon
  • No added sweeteners


Choosing low-carb smoothies at Smoothie King is possible with some simple modifications. The Slim-N-Trim Strawberry smoothie is the lowest carb option on their regular menu. Avoiding high-sugar fruits, added sweeteners, and increasing healthy fats and proteins can help create keto-friendly, blood sugar-friendly smoothies. Using the nutrition info to gauge carbohydrate content and customizing your smoothie order allows you to enjoy smoothies at Smoothie King while still meeting low-carb diet needs.

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