Pre-Workout Without Sucralose: What to Know Before You Buy

Looking for a pre-workout without sucralose?

If you want a pre-workout without sucralose, start by checking the Other Ingredients section of the label. Sucralose is a high-intensity artificial sweetener used to make supplements taste sweet without adding much sugar or calories, and it does not need to be present for a pre-workout to work.

There are effective pre-workouts that use alternatives such as stevia or monk fruit — and some use no high-intensity sweetener at all.

But there’s an important distinction:

Sucralose-free does not automatically mean healthier, cleaner, or more effective.

The sweetener is only one part of the formula.

A good pre-workout still needs sensible stimulant levels, useful performance ingredients, transparent doses, and a formulation that fits the way you want to train.

Here’s what to look for.

What is sucralose?

Sucralose is a non-nutritive high-intensity sweetener.

It’s approximately 600 times sweeter than table sugar, which means manufacturers can create a very sweet product using a relatively small amount. The FDA first approved sucralose for certain food categories in 1998 and approved it as a general-purpose sweetener in 1999.

FDA reference: Aspartame and Other Sweeteners in Food

You may also recognize sucralose from the brand name Splenda, although Splenda products can contain other ingredients in addition to sucralose.

Because sucralose provides intense sweetness without requiring much actual sweetener, it shows up in everything from beverages and protein powders to flavored supplements and pre-workouts.

And there’s a practical reason it’s common in sports nutrition:

Raw pre-workout ingredients often don’t taste very good.

Citrulline is sour.

Amino acids can be bitter.

Botanical extracts can taste earthy.

Minerals can have an unpleasant aftertaste.

A powerful sweetener makes all of that easier to mask.

So in a pre-workout formula, sucralose is generally there for taste — not exercise performance.

Is sucralose safe?

This is where supplement marketing often becomes unnecessarily dramatic.

Based on current regulatory assessments, sucralose is permitted for use as a food sweetener.

The FDA states that it reviewed more than 110 studies when assessing sucralose, including research relating to metabolism, carcinogenicity, reproduction, the nervous system, and human use. The FDA’s acceptable daily intake for sucralose is 5 mg per kilogram of body weight per day.

FDA reference: Aspartame and Other Sweeteners in Food

And this isn’t just an old assessment.

In February 2026, the European Food Safety Authority completed a new comprehensive re-evaluation of sucralose. EFSA concluded that it remains safe for consumers at its currently authorized uses and retained an acceptable daily intake of 15 mg/kg body weight per day.

EFSA reference: EFSA 2026 Sucralose Re-Evaluation

The Joint FAO/WHO Expert Committee on Food Additives also established an ADI of 0–15 mg/kg/day.

The organizations use somewhat different safety thresholds, but the larger point is clear:

Current evidence does not justify calling sucralose inherently unsafe simply because it is artificial.

That’s not the argument for choosing a sucralose-free pre-workout.

There are better reasons.

Then why do some people want to avoid sucralose?

People choose sucralose-free products for several different reasons.

Some simply prefer foods and supplements with fewer artificial ingredients.

Some don’t like the flavor or lingering sweetness.

Some report that certain sweeteners don’t agree with their digestive system.

Others are interested in emerging research surrounding non-nutritive sweeteners and prefer to minimize them while the science continues to develop.

And some simply think:

If an ingredient isn’t necessary for the supplement to work, I’d rather leave it out.

That’s a perfectly reasonable preference.

It just shouldn’t be confused with proof that sucralose is dangerous.

What does the newer research on sucralose say?

The science here is more interesting than either extreme makes it sound.

There have been concerns about whether regular consumption of non-nutritive sweeteners could influence things such as: glucose regulation, insulin response, appetite, gut bacteria, and long-term dietary behavior.

But human studies have not produced one uniform answer.

A review of human studies examining low- and non-calorie sweeteners and the gut microbiome found that only some clinical trials detected meaningful microbiome changes, while others did not. The authors concluded that larger, longer and better-controlled human studies are still needed.

PubMed reference: Human gut microbiota review

There are also newer results worth paying attention to.

A randomized, placebo-controlled 2025 trial in healthy adults found that consuming sucralose at 30% of the acceptable daily intake for 30 days was associated with reduced insulin sensitivity and changes in gut-microbiome measures.

PubMed reference: 2025 randomized sucralose trial

But an earlier randomized trial using a high sucralose dose over seven days found no significant change in glucose control, insulin resistance, or overall gut microbiome composition.

PubMed reference: Earlier randomized high-dose sucralose trial

A 2025 review of studies examining sucralose and insulin response similarly found mixed results: some studies observed increased insulin responses, while others found no effect.

PubMed reference: 2025 review of sucralose and insulin response

So the responsible conclusion isn’t:

“Sucralose destroys your gut.”

Nor is it:

“There is nothing left to study.”

A better summary is:

Sucralose is currently considered safe at authorized intake levels by major regulatory authorities, while research continues into possible metabolic and microbiome effects of regular consumption. Human findings so far are mixed.

That’s the kind of nuance we think supplement consumers deserve.

What does the WHO say about artificial sweeteners?

This deserves clarification because WHO recommendations about non-sugar sweeteners are sometimes misrepresented.

In 2023, the World Health Organization recommended against using non-sugar sweeteners as a long-term strategy for controlling body weight or reducing chronic-disease risk.

WHO reference: Guideline on Non-Sugar Sweeteners

But WHO specifically noted that the guideline was not a toxicological safety assessment and wasn’t intended to replace acceptable-intake limits established by agencies such as JECFA.

And importantly, WHO’s recommendation wasn’t directed specifically at sucralose.

It covered a broad category of non-sugar sweeteners, including both synthetic sweeteners and sweeteners such as stevia.

WHO reference: WHO news release on non-sugar sweeteners

That’s an important distinction.

Replacing sugar with an intensely sweet compound is not necessarily a long-term weight-loss strategy.

But that’s a different question from whether a particular sweetener is toxic at the amounts people normally consume.

Does sucralose improve your workout?

There isn’t a compelling reason to put sucralose in a pre-workout for performance.

It sweetens the drink.

That’s its primary job.

One randomized crossover study examined sucralose consumption immediately before exercise in trained male cyclists. Researchers found no significant differences in carbohydrate oxidation, blood glucose, insulin, lactate, heart rate, perceived exertion, or gastrointestinal symptoms compared with the control condition.

PubMed reference: Pre-exercise sucralose study

That study wasn’t designed to answer every question about sucralose or athletic performance.

But it illustrates an important point:

Sucralose isn’t an ergogenic ingredient.

It isn’t there to improve your pump. It doesn’t provide your caffeine. It isn’t responsible for nitric oxide production. It doesn’t increase creatine stores.

It’s a flavoring choice.

So if you would rather buy a pre-workout without it, there is no reason the absence of sucralose itself should compromise the performance formula.

Where do you find sucralose on a pre-workout label?

This is easy to miss.

Sucralose usually isn’t one of the ingredients prominently displayed in the Supplement Facts panel.

Look underneath it.

FDA regulations require ingredients not declared in the Supplement Facts panel — including things such as flavors, colors, fillers and sweeteners — to appear in the product’s Other Ingredients list.

FDA reference: Questions and Answers on Dietary Supplements

So if you’re avoiding sucralose, don’t stop after checking the active ingredients.

Read the entire label.

You may see something like:

Other Ingredients: Natural and Artificial Flavors, Citric Acid, Sucralose, Silicon Dioxide…

That’s where you’ll usually find it.

Sucralose-free doesn’t always mean artificial-sweetener-free

This is an important distinction.

A product can truthfully say “No Sucralose” while using another high-intensity artificial sweetener.

For example, a formula might use: acesulfame potassium (Ace-K), aspartame, saccharin, or another approved sweetener.

So decide what you’re actually looking for.

The front of the container is marketing.

The ingredient list is where you verify it.

What can pre-workout use instead of sucralose?

Several alternatives exist.

Stevia

Steviol glycosides are extracted or produced from compounds associated with Stevia rebaudiana and are intensely sweet at very small amounts.

Stevia-based sweeteners are popular in products marketed toward people who prefer to avoid artificial sweeteners.

That doesn’t mean stevia magically makes a supplement healthier.

It’s simply a different formulation choice.

Monk fruit

Monk fruit sweeteners derive their sweetness primarily from compounds called mogrosides.

Like stevia, monk fruit can provide substantial sweetness without requiring much sugar.

Small amounts of sugar

There’s also nothing inherently wrong with a formula containing a modest amount of carbohydrate if that fits the product.

“Sucralose-free” and “sugar-free” are completely different claims.

Nothing

Some supplements simply leave the product unflavored or minimally flavored.

The tradeoff is obvious: performance ingredients don’t always taste great.

Is stevia better than sucralose?

We wouldn’t make that claim.

4 Gauge uses stevia instead of sucralose, but that’s a formulation decision — not an assertion that one approved sweetener is universally healthy while the other is harmful.

The FDA recognizes both sucralose and high-purity steviol glycosides for their respective permitted food uses.

FDA reference: Aspartame and Other Sweeteners in Food

Stevia fits the type of formula we wanted to build. Someone else may reasonably choose differently.

For us, the larger principle is:

Use as little as necessary to make an effective formula enjoyable to drink.

The performance ingredients should remain the reason you bought the product.

Don’t choose a pre-workout based on the sweetener alone

This may be the most important section of this article.

Imagine two products.

One contains sucralose but also has transparent doses of well-studied performance ingredients.

The other contains no sucralose but has a massive proprietary blend, extreme stimulant dosing, and tiny amounts of the ingredients you’re actually buying it for.

Which one is the better formula?

You can’t answer that based on the sweetener.

If you’re searching for a pre-workout without sucralose, that’s completely reasonable.

But after you find one, keep reading the label. Look for:

Transparent doses

You should be able to see how much of every major active ingredient you’re getting.

A sensible amount of caffeine

More isn’t automatically better. Your pre-workout should support training, not make stimulation the entire experience.

Ingredients that serve a purpose

Don’t confuse a giant Supplement Facts panel with a better formulation. Every ingredient should earn its place. This is part of what makes a clean pre-workout clean in the first place — it’s not just about the sweetener.

Meaningful performance doses

A famous ingredient in a tiny amount is still a tiny amount.

A formula you can actually use consistently

Taste, stimulant tolerance and how the product makes you feel matter because a supplement you hate taking isn’t particularly useful.

A pre-workout can be sucralose-free and still perform

Removing sucralose doesn’t require removing the ingredients responsible for workout performance.

Those are separate decisions.

For example, current 4 Gauge Pre-Workout provides:

6,000 mg L-Citrulline DL-Malate for blood-flow and performance support.

150 mg caffeine anhydrous for energy and alertness.

200 mg L-theanine paired with caffeine as part of the formula’s focus and stimulant strategy.

It also contains beet root, rhodiola, coconut water powder, electrolytes, creatine and other supporting ingredients — with active amounts disclosed on the label. You can see the full ingredient guide for every dose.

4 Gauge product page: 4 Gauge Pre-Workout

None of those ingredients needs sucralose to function.

Why 4 Gauge doesn’t use sucralose

When we built 4 Gauge, the goal wasn’t to make the sweetest possible pre-workout.

The goal was to build something we would actually want to take ourselves: effective, transparent, moderate in stimulants, and without a long list of unnecessary additions.

The current 4 Gauge formula contains no sucralose and no artificial sweeteners.

Its Other Ingredients list currently contains: natural flavor, stevia, beet root, malic acid and silica.

Each serving contains 4 calories and 1 gram of carbohydrate.

4 Gauge product page: 4 Gauge Pre-Workout

We don’t avoid sucralose because we think people should be afraid of it.

We avoid it because we don’t need it to make the product we want to make.

That’s an important distinction.

Fear is easy marketing.

Transparency is more useful. It’s the same standard we apply across the current 4 Gauge formula and the reasoning we lay out on the 4 Gauge Research Hub.

How to choose a good pre-workout without sucralose

Here’s the checklist we’d use.

1. Check the Other Ingredients list. Don’t rely solely on the front-label claim.

2. See what sweetener replaced it. “No sucralose” doesn’t necessarily mean “no artificial sweeteners.”

3. Check caffeine per serving. Make sure it fits your tolerance and the time of day you train.

4. Look at the performance ingredients. Citrulline, caffeine, creatine, nitrates and other ingredients should be evaluated on their own merits.

5. Check the actual doses. Avoid judging a product simply by how many ingredients appear on the label.

6. Watch for proprietary blends. If individual amounts aren’t disclosed, evaluating the formula becomes much harder.

7. Decide what matters to you. Some consumers don’t care about sucralose. Others specifically want to avoid it. Either choice can be reasonable.

The best product is one whose formulation actually fits your priorities — which is really what makes a pre-workout clean in a meaningful sense.

The bottom line on pre-workout without sucralose

You do not need sucralose for an effective pre-workout.

Sucralose is primarily a sweetener. It isn’t the ingredient providing energy, focus, nitric oxide support, hydration or strength benefits.

Major regulatory authorities currently consider sucralose safe at established intake levels, so avoiding alarmist claims is important. At the same time, ongoing research continues to examine how regular consumption of non-nutritive sweeteners may affect metabolism and the gut microbiome.

EFSA reference: EFSA 2026 Sucralose Re-Evaluation

If you prefer not to consume sucralose, there are plenty of alternatives.

Just remember:

A sucralose-free pre-workout should still be judged primarily by its active ingredients, doses, stimulant strategy, transparency, manufacturing quality and how well it supports your training.

Removing one sweetener doesn’t automatically make a good supplement.

Building a good formula does.

Frequently Asked Questions

Can you get pre-workout without sucralose?

Yes. Some pre-workouts use alternatives such as stevia or monk fruit, while others are minimally sweetened or unsweetened. Check the Other Ingredients section to confirm whether sucralose is present.

Why is sucralose used in pre-workout?

Primarily for taste. Sucralose is roughly 600 times sweeter than table sugar, allowing manufacturers to mask bitter or sour active ingredients with relatively small amounts of sweetener.

FDA reference: Aspartame and Other Sweeteners in Food

Is sucralose bad for you?

Current FDA and EFSA assessments permit sucralose for approved food uses. The FDA establishes an ADI of 5 mg/kg/day, while EFSA’s 2026 re-evaluation retained an ADI of 15 mg/kg/day. Research continues into possible metabolic and gut-microbiome effects, and human findings are not completely uniform.

Does sucralose cause digestive problems?

Some people report digestive symptoms around products containing non-nutritive sweeteners, but an individual’s symptoms do not prove that sucralose was the cause. Human research into sucralose and the gut microbiome remains mixed. If you consistently feel better avoiding a particular ingredient, choosing an alternative is reasonable.

PubMed reference: Human gut microbiota review

Is stevia better than sucralose?

Not necessarily. They are different sweeteners with different origins and properties. 4 Gauge uses stevia because it fits our formulation philosophy, not because we claim that sucralose is inherently dangerous.

Does sucralose provide energy?

No. Sucralose is used primarily for sweetness and contributes little or no meaningful workout energy. The ingredients responsible for the stimulant effects of most pre-workouts are separate compounds such as caffeine.

Does 4 Gauge contain sucralose?

No. The current 4 Gauge Pre-Workout formula contains no sucralose and no artificial sweeteners. It uses stevia, along with natural flavor, beet root, malic acid and silica in its Other Ingredients list.

4 Gauge product page: 4 Gauge Pre-Workout

Is sucralose-free the same as sugar-free?

No. A supplement may be sucralose-free while containing sugar, and it can be sugar-free while containing sucralose or another non-nutritive sweetener.

Where is sucralose listed on a supplement label?

It will generally appear in the Other Ingredients section rather than among the primary active ingredients in the Supplement Facts panel. FDA rules require supplement manufacturers to disclose ingredients such as sweeteners, flavors and colors.

FDA reference: Questions and Answers on Dietary Supplements

Want to see the research behind the formula?

We built the 4 Gauge Research Hub so you can examine the science behind the ingredients rather than simply taking our marketing claims at face value.

It prioritizes human clinical trials, systematic reviews, meta-analyses and peer-reviewed research whenever they’re available.

You can also see every ingredient and current dose on the ingredients page.

And the current formula on the 4 Gauge Pre-Workout product page.

Research & Sources

• FDA — Aspartame and Other Sweeteners in Food
• EFSA — 2026 Sucralose Re-Evaluation
• WHO — Guideline on Non-Sugar Sweeteners
• FDA — Questions and Answers on Dietary Supplements
• PubMed — Human Gut Microbiota Review
• PubMed — 2025 Randomized Sucralose Trial
• PubMed — Earlier Randomized Sucralose Trial
• PubMed — 2025 Review of Sucralose and Insulin Response
• PubMed — Pre-Exercise Sucralose Study