Monster Energy Zero Ultra

Can You Drink Monster Zero Ultra On The Keto Diet?

Whether you are on the keto diet or not, we all wake up sleepy and need that extra boost of energy in the morning in order to start the day fresh. Some of us turn to coffee for this very reason, and others turn to energy drinks.

Monster energy drinks are amongst the favorite energy drinks on the market. They are known for supporting extreme sports such as skateboarding, MMA, motocross, snowboarding, electric sports, and others. 

They have a lot of very popular lines of energy drinks, along with their sugar-free line Monster Ultra, which contains the famous Monster Zero Ultra energy drink. To find out more about it keep on reading.

What Is Monster Zero Ultra?

Regular energy drinks tend to be packed with sugar- as much as 15 tablespoons per can. But, not this one. 

Monster Zero Ultra is the Monster Energy’s most popular energy drink from the sugar-free Monster Energy Ultra line that came out in the second half of 2015. 

Taste-wise, it has a lighter tasting, refreshing flavor with citrusy notes and it is slightly less sweet than their regular energy drinks. Monster Energy Zero Ultra is low in calories and low in carbs, but it still has the Monster energy-boosting blend which is very effective, even if it is contained slightly less than their other lines. 

Nutritional Facts

Here are the nutritional facts of one can or 480 grams (16 Oz.) of Monster Energy Zero Ultra:

Calories10 kcal
Fat0 grams
Protein0 grams
Total Carbs6 grams
Erythritol2 grams
Net Carbs4 grams

Monster Zero Ultra Ingredients

Since it has so little calories and carbs, you may be wondering what its ingredients are.

This energy drink contains the following ingredients: carbonated water, citric acid, caffeine, erythritol, sodium citrate, natural and artificial flavors, Panax ginseng root extract, taurine, sucralose,  benzoic acid, sorbic acid, acesulfame potassium, L-carnitine, L-tartrate, niacinamide, d-calcium pantothenate, d-glucuronolactone, inositol, sodium chloride, guarana seed extract, pyridoxine hydrochloride, cyanocobalamin. 

Disclaimer: according to the safety warning, this product is labelled to United States standards and may differ from similar products sold in other countries in terms of ingredients, labeling and allergen warnings

  • How much caffeine does Monster Zero Ultra have?

Monster Zero Ultra has 140 mg of caffeine per can (two servings).

  • How much Monster Energy blend does Monster Zero Ultra contain?

Monster Zero Ultra contains the famous Monster Energy blend which consists of a mix of taurine, caffeine, glucuronolactone, Panax ginseng extract, L-carnitine, guarana extract, and inositol. 

The amount of this energy blend that one can contain is 2800 mg (two servings) which is less than the Regular Monster drink. 

Monster Zero Ultra Sweeteners

This energy drink has 3 sweeteners to get the sweetness from and they are acesulfame potassium, sucralose, and erythritol. The first two are artificial sweeteners, and the third- erythritol is a natural sweetener

  • Acesulfame potassium or Ace K is a calorie-free substitute for sugar- artificial sweetener, that is known by the E950 name. It is about 200 times sweeter than common sugar and it has a slightly bitter aftertaste. (*)
  • Sucralose is an artificial sweetener that is used as a sugar substitute, commonly known by the E955 name. The body can’t break it down, so it is basically non-caloric. It is 320 to 1000 times sweeter than common sugar. (*)
  • Erythritol is a sugar alcohol used as a sugar substitute and food additive. It is 75%- 80% sweeter than common table sugar. (*)

Is Monster Zero Ultra Healthy?

In this case, moderation is the key. Drinking one energy drink once in a while will not cause you any problems.

However, while it is low in calories and carbs, it still has high energy-boosting properties that if consumed regularly can trigger anxiety, disturb your sleep pattern and cause problems with your teeth.

What are the possible side effects of drinking Monster Zero Ultra?

While you would not experience any problems when drinking energy drinks such as this one.

If you are sensitive to caffeine or have too much of the drink, you can potentially experience side effects such as dizziness, shaking, tachycardia(fast heartbeat), insomnia, tingling of the skin, headaches, breathing problems, restlessness. (*)

It is best to drink Monster Zero Ultra in the morning before a workout or before you go on about your day because that way you can use the energy it gives you efficiently. It is also best to do this so you can avoid sleep issues and any other side effects. 

Can You Drink Monster Zero Ultra On The Keto Diet?

The Monster Zero Ultra energy drink contains 4 net carbs per one can (16 ounce) serving so it’s not very keto-friendly compared to other sugar-free beverages.

It is still sweetened by two artificial sweeteners acesulfame potassium and sucralose. They do not alter the blood sugar levels and can be harmless to your ketosis, but artificial sweeteners are something that is usually avoided by people who follow a strict keto diet. 

If you aren’t following a strict keto diet, Monster Zero Ultra can be an OK choice for you that can boost your energy.

Where To Buy?

You can find Monster Zero Ultra in common grocery stores and markets. You can also order it online on sites like

Bottom Line:

Is Monster Zero Ultra keto-friendly?

Monster Zero Ultra is low carb, but because it contains artificial sweeteners those who follow a strict keto diet should avoid it, and look for an energy drink that uses natural sweeteners.

How many net carbs does Monster Zero Ultra have?

Monster Zero Ultra has 4 grams of net carbs per 16oz can.


Everyone needs a little boost of energy in the morning before their workout or before a hard day at work.

Monster Energy’s Zero Ultra energy drink is something that can do just that- give you the needed energy to get through a good workout or a hard day at work, all while tasting refreshing and most importantly being low-carb and sugar-free.

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