Keto made easy

Do Artificial Sweeteners Kick You Out of Ketosis?

Quick answer: For most people, no. High-intensity sweeteners are used in tiny amounts and add almost no carbohydrate, so they rarely move you out of ketosis on their own. KetoDick's view, and it is his view: stevia and erythritol are the safe bets, and he suspects aspartame and sucralose of causing an insulin response. Either way, the bigger risk is that sweet tastes keep your cravings for sweets alive.

In this article

Two different questions

"Does it kick me out of ketosis?" and "Is it good for me?" are separate questions, and mixing them up causes a lot of forum fights.

On the first, KetoDick's answer for Coke Zero is "probably fine" for ketosis. On the second, he calls any empty-calorie drink with artificial sweeteners "probably not optimal for health" (from the video) and not something he'd recommend if you're trying to eat as well as you can (video xyEZL0HuejI). Both can be true.

What's actually in the packet

High-intensity sweeteners such as stevia, monk fruit, sucralose and aspartame are so sweet that very little is needed. That's why they add almost nothing to your carb count.

The catch is what they're mixed with. Powdered packets and blends are often bulked out with a filler so you can measure them like sugar. KetoDick singles out maltodextrin, a bulking agent with a high glycemic index, as one of the hidden ingredients worth watching (video ffwBPoKxlDI). Read the ingredients, not just the front of the box. See hidden carbs and reading nutrition labels.

Sugar alcohols such as erythritol and maltitol are a different category: used in larger amounts, digested to different degrees, and lumped together on the label. That's covered in sugar alcohols and sweeteners.

Sweetener by sweetener: his ranking

Sweetener KetoDick's position Source What the evidence pages say
Erythritol "The best of the fake sweeteners" (from the video); one of his three most useful keto items DWI8qQl5BbY Not tested here
Stevia His fallback if you can't get erythritol; some find it bitter DWI8qQl5BbY Not tested here
Monk fruit On his list of approved sweeteners for coffee, tea and baking UygKGoP_BtA Not tested here
Aspartame He's "pretty sure" it's one of the two main culprits for an insulin response xyEZL0HuejI Not tested here
Sucralose The other one he names alongside aspartame xyEZL0HuejI Not tested here

That right-hand column is the honest part. The evidence pages this blog draws on contain no sweetener studies, so his insulin claims are neither confirmed nor refuted here. Treat the table as one careful reader's ranking, not a finding.

He also notes that even the "better" sweeteners aren't nothing: some people dislike them as highly processed chemicals, they provide little nutritive value, and the body still has to break them down or absorb them somewhere (video xyEZL0HuejI).

The craving problem

Here's where sweeteners can hurt even if your ketone strip says you're fine. If every coffee, dessert and drink still tastes sweet, your taste for sweet never gets a break.

KetoDick doesn't recommend copycat recipes like keto pancakes (video xyEZL0HuejI), and he suggests keeping packaged sweetened "net carb" foods to a few items a week (video UygKGoP_BtA). The reason isn't that they'll break ketosis. It's that a keto version of your old diet tends to keep your old habits running. For more, see how to stop sugar cravings on keto and keto-labeled products.

But he's not a purist about it. Erythritol is one of his three keto picks because a lot of basic keto cooking builds on having an approved sweetener (video DWI8qQl5BbY), and he warns that strict clean eating can become an eating disorder of its own (video xyEZL0HuejI). A diet soda isn't a moral failure.

What the research says

There's very little to report from the evidence pages behind this blog: they hold no studies of sweeteners and insulin, ketones or cravings. What they do support is the general principle underneath his approach. The American Diabetes Association's nutrition consensus report says cutting total carbohydrate has the most evidence for improving blood sugar (Evert 2019). Sweeteners matter to the extent they add carbs, through fillers or larger doses of sugar alcohols. On that, the label is your best tool.

If you see a confident headline that a particular sweetener "spikes insulin" or "is perfectly inert," ask to see the study, who was in it, and how much they consumed. That's his standard too: whoever makes the claim shares the source (video UygKGoP_BtA).

KetoDick's take

Put plainly, his position from the videos:

Where his view and the literature differ: the literature here is silent on his insulin claims. That doesn't make him wrong; it means you should hold the claim as his reading, and test it on yourself if it matters to you.

How to test it on yourself

  1. Keep everything else the same for a week. Same meals, same carb count.
  2. Pick one sweetener and use it as you normally would.
  3. Check your ketones the same way each day. KetoDick calls ketone strips useful biofeedback for seeing which foods cause problems (video DWI8qQl5BbY). See urine strips.
  4. Note your hunger and cravings. That's the result that matters more for weight loss.
  5. Swap sweeteners and repeat if you want a comparison.

If you have diabetes and use a glucose meter, your meter is a better tool than a strip for this, and your doctor can help you read the results, especially if you take insulin or other glucose-lowering medication. If you have a history of an eating disorder, skip the self-experiment and talk to your doctor or therapist about how strict food rules affect you; he says that person should involve both (video xyEZL0HuejI). See keto and eating disorders.

Key takeaways