How Does Coke Zero Raise Blood Sugar?

How Does Coke Zero Raise Blood Sugar? - BioCoach

Coke Zero has become increasingly popular, offering a fizzy cola experience without the added sugar and calories. Despite the low sugar, have you ever wondered how it might impact your blood sugar levels? In this in-depth article, we'll explore a fascinating experiment that seeks to unravel the truth behind the big question: does coke zero raise blood sugar? While sugar-free/ low calorie beverages may seem ideal for health-conscious individuals, there might be more to the story.

Let’s dive into the effects of Coke Zero on blood sugar levels, its potential implications for people with diabetes, and healthier alternatives that you can consider.

Understanding Coke Zero Ingredients

Blood sugar response isn’t the only thing that matters to whether or not a food is health. It is also important to examine the ingredients so let’s start there.

Artificial Sweeteners

Coke Zero contains artificial sweeteners, specifically aspartame and acesulfame potassium (ace-k), which are both known for their high-intensity sweetness without calories. These sugar substitutes have been extensively researched and are generally considered safe for consumption. The FDA and other regulatory agencies have approved them for use worldwide. Since they don't contain carbohydrates, they don't directly impact blood sugar levels.

There is some animal research on these ingredients suggesting that in high amounts they could be harmful. It is important to note that this hasn’t been replicated in humans but it may be a reason to limit your consumption.

In general, we recommend opting for zero calorie sweeteners like stevia and monk fruit instead.

Other Ingredients

Coke Zero also contains carbonated water, caramel colour, phosphoric acid, potassium benzoate, and natural flavours. These ingredients aren't known to affect blood sugar levels significantly. However, it's worth noting that some ingredients, like caramel colour and potassium benzoate, have been controversial regarding their safety. While these ingredients are approved for food and beverages, it's essential to be aware of the ongoing debates.

Effects of Coke Zero on Blood Sugar Levels-The Experiment

Let’s get to what you really want to know though. How does Coke Zero affect blood sugar levels?

Our brave experimenter and cofounder Logan decided to put Coke Zero test to determine its effects on blood sugar levels. He checked his blood sugar level before enjoying the fizzy drink, which came in at 95. Then, he used Biocoach's reliable blood glucose testing kit to monitor any changes after consuming Coke Zero. Click to see the full video below:

The Results:

  • Baseline: 95.
  • After 30 minutes: The blood sugar level rose slightly to 101.
  • After 60 minutes: The blood sugar level dropped back down to 94.
  • After 2 hours: The blood sugar level decreased further to 83.


These results show that Coke Zero did cause a minor increase in blood sugar levels initially. However, this effect was short-lived, and blood sugar levels dropped below the starting point. This suggests that, for most people, Coke Zero may not significantly impact blood sugar levels.

Note: It's important to note that our experiment involved a single individual, and results may vary between people. Some individuals may be more sensitive to artificial sweeteners and may experience a slight increase in blood sugar levels after consuming them.

Take-Home Message:

Although it's essential to be cautious with any food or drink that claims to be sugar-free, this experiment suggests that Coke Zero may not significantly impact your blood sugar levels. However, it's always wise to monitor your body's response and consult a healthcare professional if you have concerns about blood sugar management.

Are There Any Negative Side Effects Of Consuming Coke Zero For People With Diabetes?

Type 1 Diabetes and Coke Zero

For people with type 1 diabetes, monitoring their blood sugar levels and adjusting insulin is crucial. Since Coke Zero contains no sugar or carbohydrates, it's unlikely to cause a significant spike in blood sugar levels as we showed in this small experiment. However, individuals with type 1 diabetes should still be cautious and closely monitor their blood sugar levels when consuming Coke Zero or other artificially sweetened beverages. Remember, always consult with a healthcare professional when making dietary changes.

Type 2 Diabetes and Coke Zero

Maintaining stable blood sugar levels is essential for people with type 2 diabetes to avoid complications. As we mentioned earlier, research shows that Coke Zero doesn't significantly impact blood sugar levels. However, those with type 2 diabetes must monitor their response to artificial sweeteners and discuss any concerns with their healthcare provider.

It's also worth noting that while Coke Zero may not directly impact blood sugar levels, consuming artificially sweetened beverages might contribute to increased cravings for sugary foods. This could lead to overeating and poor blood sugar control in the long run.

Coke Zero and Blood Sugar: The Consensus

Our experiment shows that Coke Zero doesn't raise blood sugar levels for most individuals. However, each person may respond differently to artificial sweeteners, so it's essential to monitor your blood sugar levels and consult a healthcare professional if you have any concerns or notice any changes after consuming Coke Zero.

Remember that individual reactions to artificial sweeteners can vary, and some people may experience increased cravings for sugary foods, which could affect their overall blood sugar control.

Healthy Alternatives to Coke Zero

If you're looking for healthier alternatives to Coke Zero that won't impact your blood sugar levels, consider the following options:

Unsweetened Beverages

Opt for unsweetened beverages like sparkling water, which can provide the same fizzy sensation as Coke Zero without added sweeteners or calories. You can even find flavored sparkling water options that use natural flavors without added sugars.

Flavored Water

Infuse your water with natural flavors like lemon, cucumber, or berries. This can add a refreshing twist to your drink without affecting blood sugar levels. Simply add fresh fruit or vegetables to your water and let it sit for a few hours to allow the flavors to blend.

Herbal Teas

Herbal teas come in various flavors and can be enjoyed hot or cold. They are a great alternative to sugary drinks and can help you stay hydrated without impacting your blood sugar. Look for caffeine-free options if you're sensitive to caffeine or want to enjoy a soothing cup before bedtime.

Does Coke Zero Raise Blood Sugar- Final Verdict

In conclusion, with its artificial sweeteners, no carbs soft drinks like Coke Zero is generally considered safe for consumption and does not appear to raise blood sugar levels in most people. However, individual responses can vary, and it's important to monitor your blood sugar levels and consult with a healthcare professional if you have any concerns. Be aware of the potential for increased cravings for sugary foods when consuming artificially sweetened beverages and this could increase diabetes risk. While blood sugar didn’t spike, the ingredients in Coke Zero are less than desirable, so for healthier alternatives to Coke Zero, consider using water, herbal teas, or fresh fruit smoothies to quench your thirst without affecting your blood sugar levels.


Is Coke Zero Sugar a better option for people with diabetes than regular Coca-Cola?

Coke Zero Sugar is generally considered a better option for people with diabetes than regular Coca-Cola or any regular soda, as it does not contain sugar or carbohydrates that can impact blood sugar levels. However, individual responses can vary, so consult a healthcare professional when making dietary changes.

What is the difference between Diet Coke and Coke Zero regarding blood sugar effects?

Both Diet Coke and Coke Zero are diet sodas that contain artificial sweeteners that do not significantly impact blood glucose levels. The main difference is the flavor profile, with Coke Zero being designed to taste more like regular Coca-Cola. The effect on blood sugar levels for both options is similar.

Can Coke Zero cause insulin resistance?

No direct evidence exists that Coke Zero or its artificial sweeteners cause insulin resistance or decreases in insulin sensitivity. However, some studies suggest that consuming artificially sweetened beverages may be associated with an increased risk of metabolic syndrome, which includes higher insulin levels and insulin resistance (1). Maintaining a balanced diet and consulting with a healthcare professional for personalized advice is important.

How do artificial sweeteners in Coke Zero affect gut health and blood sugar levels?

There is some evidence that artificial sweeteners, like those in Coke Zero, may impact gut health, potentially altering the gut microbiota which could affect glucose tolerance (2). However, the relationship between gut health and blood sugar levels is complex, and more research is needed to fully understand the effects of artificial sweeteners on gut health and blood sugar levels.

Does drinking Coke Zero contribute to weight gain/obesity, which may indirectly affect blood sugar levels?

Coke Zero does not contain sugar or calories, so it's unlikely to contribute directly to weight gain. However, some studies suggest that artificial sweeteners are correlated with weight gain (3) people who consume artificially sweetened beverages may compensate by eating more calories from other sources, which could lead to weight gain and indirectly affect blood sugar levels (4).

How does the caffeine content in Coke Zero impact blood sugar levels?

The low caffeine content in Coke Zero is unlikely to impact blood sugar levels significantly for most individuals. However, some people may be more sensitive to the effects of caffeine, and it may cause blood sugar levels to rise temporarily. It's important to monitor your blood sugar levels and consult a healthcare professional if you have concerns about caffeine intake.


  1. Nettleton, J. A., Lutsey, P. L., Wang, Y., Lima, J. A., Michos, E. D., & Jacobs, D. R. (2009). Diet soda intake and risk of incident metabolic syndrome and type 2 diabetes in the Multi-Ethnic Study of Atherosclerosis (MESA). Diabetes Care, 32(4), 688-694.

  2. Suez, J., Korem, T., Zeevi, D., Zilberman-Schapira, G., Thaiss, C. A., Maza, O., ... & Kuperman, Y. (2014). Artificial sweeteners induce glucose intolerance by altering the gut microbiota. Nature, 514(7521), 181-186.

  3. Fowler, S. P., Williams, K., Resendez, R. G., Hunt, K. J., Hazuda, H. P., & Stern, M. P. (2008). Fueling the obesity epidemic? Artificially sweetened beverage use and long-term weight gain. Obesity (Silver Spring, Md.), 16(8), 1894-1900.

  4. Raben, A., Vasilaras, T. H., Møller, A. C., & Astrup, A. (2002). Sucrose compared with artificial sweeteners: different effects on ad libitum food intake and body weight after 10 wk of supplementation in overweight subjects. The American journal of clinical nutrition, 76(4), 721-729.

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