Keto Recipes

Refreshing Homemade Grapefruit Keto Soda (Low Sugar and Low Carb)

By Bree

This homemade keto grapefruit soda is healthy, very refreshing and so much better than any keto-friendly soda you can buy. It’s perfectly tart and sweet with all the fizzy bubbles you crave.

Refreshing Homemade Grapefruit Keto Soda

5 Reasons Homemade Grapefruit Soda is Better (And Healthier for You) Than Store-bought Sodas

  • It’s low in sugar. Grapefruit soda has barely even 1 gram of sugar while a typical can of soda has anywhere between 25 grams to 40 grams of sugar.
  • Grapefruit contains vitamins and minerals. Grapefruit is an excellent source of vitamin C, vitamin A, potassium and calcium. (1)
  • Grapefruit is rich in antioxidants. Antioxidants help protect us against free radical damage.
  • Grapefruit may have anti-cancer properties. Phytonutrients in grapefruit have been found to have anti-tumor properties. (2)
  • Homemade grapefruit soda can help promote healthy weight management. Since this recipe is low-carb and does not contain the other chemicals and ingredients found in regular soda, it doesn’t spike blood glucose levels and doesn’t cause sugar cravings.

Keto Soda

How to Make the Best Homemade Keto Grapefruit Soda (Low Carb, Low Sugar)

Making your own homemade soda is incredibly easy. Here’s how:

Keto Soda

  • Make the syrup. Boil together your water, sweetener and grapefruit zest. Remove the grapefruit zest once done.
  • Squeeze the juice out of your grapefruit. Use a juicer or manually extract the juice.
  • Compose your homemade soda. Divide the syrup and grapefruit juice between 2 glasses and then add seltzer water and ice cubes to each glass.

Keto Soda

Alternative Homemade Keto Soda Flavors to Try

Be sure to give these other flavor combos a try! Simply replace the grapefruit juice and zest in this recipe with:

Raspberry and Lemon – This is my favorite lemonade flavor and also one of my top homemade soda flavors.

Use ½ cup raspberry juice with 3 tablespoons of lemon juice and 3 strips of lemon zest.

Blueberry, Orange, and Mint – This is so refreshing and really wakes up the senses.

Use ¼ cup orange juice, ⅛ cup crushed blueberries, 2 sprigs of mint.

Kiwi and Watermelon – One of my favorite combos when I have ripe watermelon on hand.

Use ½ cup crushed watermelon and ⅛ cup of crushed kiwi.

Keto Soda

Important Disclaimer on Grapefruit If You’re Diabetic and for Some RX Medications

Consult your physician if you are taking any medications to avoid any potential interactions when consuming grapefruit, as it has been shown to interact with certain classes of drugs.

More Keto-friendly Drinks You’ll Love


Print Recipe
Keto Soda

Refreshing Homemade Grapefruit Keto Soda (Low Sugar and Low Carb)



  • 2 tbsp granulated Stevia or other low carb granulated sweetener 
  • ¼ cups water
  • ¾ cups freshly squeezed grapefruit juice
  • 34 strips grapefruit zest 
  • 1 cup chilled seltzer water
  • a few ice cubes


  1. Add the water, sweetener and grapefruit zest to a saucepan. 
  2. Bring to a boil over medium heat. 
  3. Remove from the heat. 
  4. Discard the grapefruit zest. 
  5. Let the syrup cool completely. 
  6. Divide the syrup and grapefruit juice between 2 glasses. 
  7. Stir to combine. 
  8. Add the seltzer water and ice cubes and serve immediately.


  • Serving Size: 1
  • Calories: 81
  • Carbohydrates: 4.9g
  • Fat: .1g
  • Sugar: .2g
  • Protein: .5g
  • Fiber: .1g

Print Recipe

P.S. Can’t use grapefruit? Try these refreshing low carb keto soda recipes instead:

Make sure to sign up for free to get instant access to the 5-Ingredient Keto Cookbook, which includes my favorite 20+ keto recipes of all-time, all under 5 ingredients.

View All the 5-Ingredient Keto Cookbook Recipes

Ask a Question/Comment

Recipe rating 5 Stars 4 Stars 3 Stars 2 Stars 1 Star

Facebook icon Twitter icon Instagram icon Pinterest icon Google+ icon YouTube icon LinkedIn icon Contact icon