Is Coke Zero Keto-Friendly? Low Carb Treat, or Unhealthy Drink?

While Coke 0 is one of the most popular diet sodas, is Coke Zero keto and low in carbs, or is it an unhealthy drink that should be avoided?⁷

We’ll be the fist to admit that Coke Zero has a crave-worthy flavor and minimal aftertaste compared to other low-calorie drinks but that might not outweigh some of the less than healthy ingredients within it.

To get to the bottom of this, let’s examine the current research to come to a conclusion before reviewing carbonated keto alternatives to diet soda.

How Many Carbs Are in Coke Zero?

Coca-Cola Zero Sugar has no calories, carbs, fat, or protein. A 12 ounce can of Coke Zero contains:

• 40 milligrams of sodium
• 60 milligrams of potassium
• 34 milligrams of caffeine (about ¼ the caffeine found in 12 ounces black coffee)

The ingredients in Coke Zero are:

• Carbonated water
• Caramel color
• Phosphoric acid
• Aspartame (87 milligrams)
• Potassium benzoate 
• Natural flavors
• Potassium citrate
• Acesulfame potassium (also known as acesulfame K – 47 milligrams)
• Caffeine 

Coke Zero is carb free. It’s sweetened with two different artificial sweeteners, aspartame and acesulfame K.

Is Coke Zero Keto Approved?

Strictly speaking, the answer to ‘Is Coke Zero keto?’ is yes – this drink contains zero calories and zero carbs. Many people will raise various objections to this claim, suggesting that Coke Zero can cause weight gain, exacerbate digestive problems, or even cause cancer.

Source: brainmaster via Canva.com⁸

We’ll examine those claims in detail.

Will Diet Coke Kick Me Out of Ketosis?

Since Coke Zero and Diet Coke contain zero carbs, they cannot kick you out of ketosis. Only food and drink that contains carbohydrates can do so.

Additionally, research indicates that diet soda does not increase insulin resistance or diabetes risk.¹

Is Diet Coke vs Coke Zero Better for Keto?

When comparing Coke Zero and Diet Coke, keto dieters can rest easy. Both drinks are carb- and calorie-free, and have similar ingredients. The main difference is taste.

Coke Zero tastes more like Classic Coca-Cola, while Diet Coke has a slightly ‘lighter’ taste.

The Downsides of Coke Zero & Reasons It May Be an Unhealthy Drink

Many people demonize diet soda, claiming that the artificial sweeteners it contains cause cancer, disrupt gut health, have a negative impact on mood, and cause weight gain. However, the research on these topics is often misinterpreted or blown out of proportion.

Coke Zero has been FDA-approved since 2005. The ADI (Acceptable Daily Intake) of aspartame set by the FDA is 50 milligrams of aspartame per kilogram of bodyweight per day.

Source: George Fairbairn via Canva.com⁹

To put this in perspective, a 140-pound person would have to drink 36 cans of Coke Zero in one day to reach this limit.

The ADI of acesulfame K is 15 milligrams per kilogram of body weight. That same 140-pound person would have to drink 20 cans of Coke Zero in a day to reach this limit.

The Link Between Aspartame & Cancer in Rats (Debated)

The studies that link aspartame and cancer in rats rely on dosing rats with high quantities of aspartame. For example, in this study, rats were dosed with quantities equivalent to the ADI in the US.²

A 200-pound person would need to drink 51 cans of Coke Zero to mimic this response. This is nearly 5 gallons of Coke Zero! Drinking that quantity of ANY liquid would cause immediate physical problems that would be far more significant than any negative side effects from artificial sweeteners.

As far as research with humans, a study involving over 100,000 adults indicated that consuming higher-than-average quantities of aspartame and acesulfame-K may increase cancer risk.³ However, consuming traditionally sweetened soda carries associated cancer risk as well.

Ultimately, moderate or occasional consumption of Coke Zero is not associated with significant cancer risk.

Possible Mood Changes

Drinking large quantities of diet soda (18 cans per day for a person weighing 140 lbs.) may increase irritability and depression and decrease brain function.⁴ Again, this is a question of dosage.

Besides, the amount of caffeine in this quantity of Coke Zero would impact mood far more than the artificial sweeteners.

Potential Digestive Problems

Some experiments performed on mice indicate that the artificial sweetener acesulfame K may have a negative impact on gut health.⁵ However, these mice were given a dose equivalent to 140 lb. person drinking 50 cans of Coke Zero per day.

Obviously, a pattern is emerging. Unless you’re drinking extreme and unsustainable quantities of diet soda, these various health concerns are non-issues.

The Benefits of Coke Zero as a Low Carb Treat for Keto & Weight Loss

In moderation, research indicates diet soda may help with weight loss and weight loss maintenance.⁶ This is likely because it can replace other, less-healthy drinks and help people adhere to keto diet plans without feeling deprived.

This, of course, raises an important question:

What is moderation? One to two 12-ounce cans per day is likely a good limit for most people.

Reports that diet soda causes weight gain by spiking insulin or creating cravings are largely unsubstantiated. As noted above, artificial sweeteners do not contribute to diabetes risk and may even help maintain weight loss.

Ultimately, this is a personal consideration.

Does diet soda help you adhere to your diet? Does it impact your weight?

It’s worth experimenting to find out for yourself.

The answer to ‘is Coke Zero keto?’ should depend on whether it helps YOU stick to your keto weight loss plan.

Source: DAPA Images via Canva.com¹⁰

Liquid calories can make or break weight loss efforts for many people, and ultimately, diet soda should not be a huge source of concern. Sodas sweetened with high fructose corn syrup, alcohol, and other carb-laden beverages are much more likely to contribute to health concerns in the long run.

Some people use Coke Zero and other diet sodas as a chaser for liquor because lowering the amount of empty calories is one of the cornerstones of figuring out how to lose weight gained from alcohol – and it’ll help avoid weight gain in the first place as well.

Ultimately, focus on drinking plenty of water and including drinks like green tea that can actively promote improved health and weight loss since they fall into drinks that reduce belly fat. Drink diet soda in moderate amounts if you enjoy the taste and it helps you stick to your keto goals.

In this way, it can aid your weight loss efforts and serve as a zero-calorie treat when cravings strike!

Keto-Friendly Coke Zero Alternatives

While Coke Zero can be part of a successful keto diet, it’s worth exploring other alternatives as well. The question ‘is Coke Zero keto?’ is just the tip of the iceberg!

Carbonated beverages can help fill your stomach when you’re feeling hungry and some of the options on this list even provide additional health benefits, like BCAAs, probiotics, and essential minerals.

Sparkling Water (various brands, including La Croix)

Source: WIRED on Youtube¹¹

While La Croix started the trend, there are dozens of sparkling water options available now.

Prefer plain bubbles? Try Perrier or Topo Chico.

For a burst of fruit flavor, popular brands include Bubbly, Waterloo, and Aha. These brands have tons of tasty flavors, and if you prefer some sweetness, it’s easy to add a few drops of a keto sweetener like liquid stevia.

Zevia

Zevia is the most popular stevia-sweetened soda on the market today. For people who can’t lay their concerns about artificial sweeteners to rest, this is a great alternative to Coke Zero and other diet sodas.

Source: Tami Dunn on Youtube¹²

Zevia comes in 18 different flavors, including:

• Cran-Raspberry
• Fruit Punch
• Orange Cream
• Black Cherry
• Caffeine Free Cola
• Cherry Cola
• Cola
• Creamy Root Beer
• Cream Soda
• Dr. Zevia
• Ginger Ale
• Ginger Root Beer
•  Grape
• Grapefruit Citrus
• Lemon Lime Twist
• Mountain Zevia
• Orange 
• Strawberry

Virgil’s

Virgil’s sells zero sugar handcrafted soda sweetened with erythritol and stevia. For people looking for a craft soda experience (perhaps to use as a mixer with high-proof alcohol), this brand is the perfect choice.

Source: Two Dudes Reviews on Youtube¹³

Their sodas come in slimline cans and glass bottles. Flavors include:

• Grapefruit
• Dr. Better
• Ginger Ale
• Root Beer
• Vanilla Cream
• Black Cherry
• Lemon Lime
• Cola
• Orange Cream

Fit Soda

This product is a unique combination of healthy soda and sports drink. It’s made with electrolytes and branched-chain amino acids (BCAAs) to help with workout recovery.

Source: Fit Soda Media on Youtube¹⁴

Containing zero caffeine, it’s sweetened with sucralose (also known as Splenda). Flavors include:

• Orange Cream
• Root Beer Vanilla Float
• Black Cherry Cola
• Sparkling Citrus

Poppi

This is the only product on this list that isn’t 100% calorie- and carb-free, but since it contains only 5 grams net carbs per can, plus beneficial probiotics, it’s worth including. Initially featured on Shark Tank, Poppi soda is made with apple cider vinegar, organic fruit juice, stevia, and organic cane sugar.

Source: Ace Reviews on Youtube¹⁵

Each can contains 25 calories. Flavors include:

• Cherry Limeade
• Strawberry Lemon
• Raspberry Rose
• Ginger Lime
• Orange
• Watermelon
• Classic Cola
• Doc Pop
• Root Beer

Sparkling Ice

This popular zero-calorie drink, available at most grocery stores, comes in a staggering assortment of flavors and varieties. When choosing Sparkling Ice, keto dieters need to keep in mind that it’s sweetened with sucralose.

However, it’s also fortified with vitamins and antioxidants.

Source: TheStreet on Youtube¹⁶

It comes in caffeinated flavors for an energy drink experience. Plus, it’s quite affordable! Flavors include:

• Grape Raspberry
• Black Cherry
• Berry Lemonade 
• Black Raspberry
• Fruit Punch
• Cherry Limeade
• Strawberry Watermelon
• Strawberry Lemonade
• Kiwi Strawberry
• Pink Grapefruit
• Peach Nectarine
• Orange Mango
• Coconut Pineapple
• Classic Lemonade
• Lemon Lime
• Cherry Vanilla +Caffeine
• Black Raspberry +Caffeine
• Blue Raspberry +Caffeine
• Watermelon Lemonade +Caffeine
• Tropical Punch +Caffeine
• Strawberry Citrus +Caffeine
• Citrus Twist +Caffeine

Coke Zero is a low-carb treat that is ‘semi-healthy’. It can help with weight loss and keto adherence since it contains no calories or carbs.

Now that you know the answer to ‘Is Coke Zero keto?’, you can feel confident enjoying it as an occasional keto treat.

Frequently Asked Questions Is Coke Zero Keto?