Does Splenda Break A Fast? [Complete Answer, Backed By Science]
Does Splenda break a fast? Can you have Splenda while fasting? Learn everything you need to know about Splenda and fasting here!

If you enjoy adding Splenda to your coffee or tea, you may be curious about how Splenda affects fasting. Will Splenda break a fast? Can I drink coffee with Splenda while fasting? In this guide, we will answer all of these questions.
Does Splenda Break A Fast?
Yes, Splenda breaks a fast. You should not consume Splenda while fasting.
Does Splenda Break A Fast – Further Details
Yes, Splenda breaks a fast. Many fasting experts have differing opinions on using a small amount of Splenda while fasting.
I believe in the power of clean fasting. Additionally, any food or beverages besides water, tea or black coffee stimulates digestive processes, the gut and may spike insulin levels. All of these processes pull you out of a fasted state.
Splenda is made from sucralose. Sucralose on its own does not have calories, however to make Splenda, dextrose and malodextrin are added to sucralose. Did you know that malodextrin has a higher glycemic index than table sugar? This means that maltodextrin can cause a spike in blood sugar shortly after eating foods that contain it. (1)
While blood sugar spikes are normal when eating, this means that your insulin levels will spike and Splenda WILL break your fast.
Can You Drink Coffee With Splenda While Intermittent Fasting?
No, you should not consume coffee with Splenda while intermittent fasting. Splenda will spike your insulin levels and remove you from a fasted state.
This article is all about does Splenda break intermittent fasting and can I have Splenda while fasting.
What Can I Consume While Fasting?
If you are following a clean fast, you can consume the following items when fasting:
- Water (unflavored, no added fruit)
- Black coffee
- Plain green tea or black tea
- Mineral water, unflavored sparkling water, seltzer water (with no added ingredients)
- Salt, electrolytes, or minerals (unflavored, no additives)
- Medications as prescribed by your doctor

Additional Fasting Resources
Here are some other frequently asked fasting questions that may help you out!
- Does Honey Break A Fast?
- Does Stevia Break A Fast?
- Can You Chew Gum While Fasting?
- What Are The Best Electrolytes For Fasting?
- Why Am I Not Losing Weight On OMAD?
- Does Lemon Water Break A Fast?
- Does Diet Soda Break A Fast?
- Does Cinnamon Break A Fast?
- Do Artificial Sweeteners Break A Fast?
- Does Zevia Break A Fast?
Frequently Asked Questions
You should not use any sweeteners while fasting. Using sweeteners during your fast will activate your digestive system and gut and will break your fast. Even though sweeteners contain very few calories, they can cause an insulin response.
There are not any sweeteners that will not break your fast. If you want to consume sweeteners, wait until your eating window. Some experts argue that small amounts of sweeteners are okay. However, using sweeteners causes your digestive system and gut to activate, therefore breaking your fast.
No, you should not use artificial sweeteners while fasting. Artificial sweeteners will stimulate an insulin response, activate your digestive system and gut, therefore breaking your fast.
1. https://www.medicalnewstoday.com/articles/322426#is-maltodextrin-safe