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Is Crystal Light Keto Friendly? [And Other Keto Drinks]

Crystal light has got to be one of the oldest “low-calorie” water enhancers, at least that I can remember.  Eventually, I was so tired of drinking plain water and was looking for ways to make it more palatable, In comes crystal light.

I wasn’t keto at the time this was happening, but eventually, when I made the jump, I wondered if I could still consume crystal lite while following a ketogenic diet.

Flavoring water with Crystal Light is ok while following a keto diet and shouldn't disrupt ketosis if drank in moderate amounts. Each Crystal Light flavor is low or no calories and ranges between 0 and 3 grams of net carbs per serving, making it perfectly ok on a ketogenic diet.

In this article, I’ll go over all of the different crystal light products, what’s in them, if they’re good for you, how they may or may not break a fast, and other popular alternatives.


Can You Have Crystal Light Packets While On A Keto Diet

I get it; water can be boring sometimes. It’s a good thing we live in an age where we have multiple choices to resolve that problem, one of them being crystal light.

Back when I started drinking crystal light, they had served them in multi-serve canisters that you would peel open and pour into your water. Now, you can get convenient single-serve “on the go” packets to quickly pour in a bottle of water. 

Will crystal light kick you out of ketosis? Crystal light will not kick you out of ketosis. 

For the most part, the only way to be kicked out of ketosis would be to consume too many carbohydrates over some time, crystal light has very few if any.

If you’ve been kicked out of ketosis and wondering if it’s the crystal light you’re drinking, chances are it’s something else in your diet that you have to troubleshoot.

How Many Carbs Are In Crystal Light

As of writing this, crystal light has four distinct product lines.

Those are:

  1. Crystal Light Classics
  2. Crystal Light Tea
  3. Crystal Light with Caffeine
  4. Crystal Light Pure

The carbs vary depending on the specific product line and flavor, below is a table that illustrates all of crystal lights different products and their carb counts.

In general, most crystal light products contain 0 – 3g of net carbs per packet. Each given net carb listed below is net carbs per packet of the given crystal light flavor.

Of course, crystal light makes slight changes here and there, so please also double-check the nutrition label to make sure it is accurate. 

I do my best to keep these tables updated with current information, but sometimes they may be off if the formulation has been modified.

ClassicsNet Carbs
Berry Sangria0g
Black Cherry Lime0g
Tropical Coconut0g
Strawberry Watermelon3g
Blackberry Lemonade0g
Blueberry Raspberry0g
Cherry Pomegranate3g
Concord Grape3g
Fruit Punch3g
Mango Passionfruit 0g
Pink Lemonade3g
Pomegranate Lemonade0g
Raspberry Ice3g
Raspberry Lemonade3g
Strawberry Kiwi3g
Strawberry Lemonade0g
Strawberry Orange Banana3g
TeaNet Carbs
Peach Iced Tea3g
Peach-Mango Green Tea3g
Lemon Iced Tea Decaf3g
Lemon Iced Tea 3g
Pomegranate Green Tea0g
Raspberry Green Tea3g
Raspberry Iced Tea3g
Sweet Tea3g
w/ CaffeineNet Carbs
Acai Berry Bliss0g
Cherry Splash0g
Grape 3g
Peach Mango3g
Strawberry Pineapple Refresh0g
Tropical Paradise Punch0g
Wild Strawberry3g
PureNet Carbs
Lemon Iced Tea1g
Mixed Berry Energy3g
Peach Iced Tea1g
Raspberry Lemonade1g
Strawberry Kiwi 1g
Strawberry Lemonade Energy3g
Tangerine Mango1g
Tropical Blend1g
Tropical Citrus Energy3g

What’s In Crystal Light 

Below are the ingredient lists for the four different varieties of crystal light products available.

Whats in crystal light ingredients

The most common ingredients you’ll see in each one are listed below:

  • Citric Acid
  • Maltodextrin
  • Natural Flavors
  • Artificial Flavors
  • Food Coloring
  • Artificial Sweeteners

Citric Acid

Citric acid is naturally found in citrus fruits, though the one found in crystal light is likely a manufactured version. In many food products, it’s used as an additive for flavor and preservation.


While maltodextrin is technically a source of carbohydrates, it’s generally used in products as a filler or thickener to increase volume and shelf life of packed foods. 

What is crystal light sweetened with?

Crystal light is sweetened with a combination of sweetness, those being:

  • Aspartame
  • Acesulfame potassium
  • Sucralose *Tea Crystal Light Line
  • Stevia *Pure Crystal Light Line
  • Sugar *Pure Crystal Light Line

While individual crystal light packets do have trivial amounts of sugar, it’s not enough for one pack to kick you out of ketosis. 

Remember, it’s the TOTAL amount of carbohydrates over the day that will make the most significant difference.

That said, if enjoying the higher carb varieties of crystal light (~3g carbs), it’s best to make sure you’re not overdoing it and only using one or two packets. 

 It’s still best that you fill your carbs with nutritious and filling sources, such as green leafy vegetables. Although fitting in a packet of crystal light, even the higher carb varieties, are perfectly acceptable within moderation.  

Is Crystal Light Good For You?

Many people question whether products like crystal light is good for you, and to give you the truth…

There is no real right answer. 

Some people swear off certain ingredients and sugar-free sweeteners, and some are against the use of food colorings in their food, so it all just comes down to whether you react or have an aversion against certain ingredients.

Scientifically speaking, all the ingredients in crystal light have been tested and proven safe, thus approved by the U.S. Food and Drug Administration (USFDA) for consumption.

When it comes to the sugar-free sweetener aspartame, it has the most extensive amount of studies to back its safety for human consumption. 

That being said, aspartame has been demonized by certain people and organizations without anything to back up their claims.1 2 3

How much aspartame is safe?

 The recommended safe dose of aspartame is set at 40mg/kg/day. 

To put that into perspective, if you were a 180lb man, you would have an upper safety limit of 3,240mg per day. 

A can of diet soda has ~180mg of aspartame. Thus you would need to consume more than 18 cans of diet soda to reach the recommended safe dose.

Is Crystal Light Good For Diabetics?

Crystal light makes for a great alternative to sugar-filled soft drinks and juices since they are artificially sweetened and contain very minimal if any amount of carbohydrates.

The sugar-free sweetness in crystal light, aspartame, ace-K, stevia, and Sucralose all have a glycemic index of 0, so they don’t pose an impact on blood sugar. 

Crystal Light or other sugar-free beverages are often recommended to those who have type 2 diabetes as a better alternative to their sugar-filled counterparts.

Can You Have Crystal Light While Intermittent Fasting

If you’ve been doing keto for any considerable amount of time, you may be starting to experiment with intermittent fasting or even multiple day fasts. 

Can you have crystal light during your fasting window? That would depend on the purpose of your fast.

If you are fasting for the reported health benefits like autophagy, then it’s probably best that you stick with plain water during your fast.

 However, if your goal is FAT LOSS, then drinking some crystal light during your fast window will have very little to no effect, and that’s because it’s your overall caloric intake at the end of the day that matters most. 4 

Assuming crystal light doesn’t lead you to eat more food over the day, there will be no noticeable difference in fat loss if you drink crystal light during your fasting window or not.

So drink up.

Other Keto Friendly Water Enhancers

Are you looking for other keto drink besides water? Here are a few ideas down below to quench your thirst while following a ketogenic diet.


Electrolyte Enhanced

The Takeaway

Crystal light beverages are keto friendly and range between 0 and 3 grams of net carbs per packet.

If you’re planning to enjoy some crystal light, make sure you don’t overdo it, especially if you drink some of the higher carb flavors that they offer. 

To take up your keto diet a notch, I’d recommend using the water enhancers I listed above that also have a sufficient amount of electrolytes. 

Not only will you be able to flavor your water with these products, but you’ll consuming essential minerals that will help keep you hydrated and avoid side effects like the keto flu.

When it comes down to it, if it’s the only way to get you to consume enough fluids and stay hydrated, I’m all for water enhancers.

Frequently Asked Questions

Are there carbs in Crystal Light?

Crystal light contains only 5 calories per serving. At the same time there are 0 carbs in the drink which makes it an exciting proposition.

What's a healthier alternative to Crystal Light?

The healthiest alternative to Crystal light is drinking water. Not only will it make you better, water doesn't cause any insulin spikes or anything.


Founder of The Art Of Keto.

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