What does "stim-free" mean on a pre-workout label?

It means the formula contains no caffeine or other central-nervous-system stimulants. Everything else a pre-workout usually does — the nitric-oxide "pump" ingredients, the endurance and hydration ingredients, the focus ingredients that are not stimulants — can still be there. "Non-stim", "caffeine-free" and "pump" products are all describing the same idea.

Do stim-free pre-workouts actually do anything?

They do a narrower job. The blood-flow ingredients most of them are built on — citrulline and its relatives — do not need caffeine to work, so the pump and the training-volume side of a pre-workout survives. What you give up is caffeine itself, which is one of the best-evidenced performance supplements there is, mostly through alertness and a lower sense of effort. If you want that effect, a stim-free product is not a substitute for it.

Will a stim-free pre-workout still make me tingle?

Only if it contains beta-alanine, which is a separate ingredient from caffeine and is what causes the prickling. Of the 5 caffeine-free products we track, 3 are also beta-alanine-free: Gorilla Mode Nitric Stim-Free Pre-Workout, Ghost Pump Non-Stim Pre-Workout, RAW Pump Non-Stim Pre-Workout. Stim-free does not automatically mean tingle-free.

Can I take a stim-free pre-workout before an evening workout?

That is one of the main reasons people use them. Caffeine has a half-life of roughly five hours in most people, so a late-afternoon or evening dose can still be measurably in your system at bedtime. A caffeine-free formula avoids that problem entirely.

Which pre-workouts have no caffeine?

In the Pick My Pre catalog: Gorilla Mode Nitric Stim-Free Pre-Workout, Legion Pulse Caffeine-Free Pre-Workout, Transparent Labs Stim-Free Pre-Workout, Ghost Pump Non-Stim Pre-Workout, RAW Pump Non-Stim Pre-Workout.

The Best Stim-Free Pre-Workout

A stim-free pre-workout keeps the pump and endurance ingredients and drops the caffeine. Here is who that actually suits, what you trade away, and every caffeine-free option we track.

Who should train caffeine-free

There are four common reasons, and they are all practical rather than ideological:

You train late. Caffeine's half-life is roughly five hours, so a 6pm scoop is still working on you at midnight. This is the single most common reason people go stim-free — there is a whole page on picking a pre-workout for evening workouts if that is you.
You already drink coffee. If you have had two or three cups before you get to the gym, a 350mg pre-workout on top is stacking, not supplementing. Pre-workout vs coffee puts every product we track into cups so you can add up the real total.
You are taking a tolerance break. Caffeine tolerance builds with regular use, and cycling off for a few weeks is a common way to get the effect back. A stim-free product lets you keep a pre-workout routine while you do it, and it beats moving up to a stronger formula, which only buys a few weeks.
Stimulants do not agree with you. Jitters, a racing heart, anxiety or a hard crash afterwards are all reasons to skip them, and none of them require a diagnosis to take seriously.

What you keep, and what you give up

What you keep is most of the formula. The "pump" side of a pre-workout runs on citrulline and related nitric-oxide ingredients, which widen blood vessels and increase blood flow to working muscle. None of that depends on caffeine. The same is true of the hydration and endurance ingredients — glycerol, betaine, electrolytes. The formulas that stack those ingredients are mostly caffeine-free, which is why the pump shortlist overlaps this one so heavily. That widening is also the first thing to suspect if a caffeine-free scoop still gives you a headache, and pre-workout headaches explains why the formulas that stack several of those ingredients are the ones to look at first.

What you give up is caffeine, and it is worth being honest about that: caffeine is one of the most reliably evidenced performance supplements available, mainly by increasing alertness and reducing how hard a given effort feels. No stim-free formula replaces it. If you want to feel switched on, a caffeine-free product will feel like less — and the focus guide counts how little of this shelf carries anything else aimed at your head. If what you want is blood flow and a routine you can use at 9pm, you are not really losing anything.

Stim-free pre-workouts we track (5)

Every product below contains zero caffeine. Prices and formulas change often, so check the label on the product page before buying.

Gorilla Mode Nitric Stim-Free Pre-Workout$49.99
Stimulant-freeNo beta-alanineCreatine
Stimulant-free pump and performance formula with creatine and no beta-alanine.
Key ingredients: L-Citrulline, Creatine Monohydrate, GlycerPump, Nitrosigine, Agmatine Sulfate
Legion Pulse Caffeine-Free Pre-Workout$44.99
Stimulant-freeBeta-alanine (tingles)Vegan
The same naturally sweetened Pulse formula without any caffeine.
Key ingredients: L-Citrulline Malate, Beta-Alanine, Betaine Anhydrous, Alpha-GPC, L-Theanine
Transparent Labs Stim-Free Pre-Workout$49.99
Stimulant-freeBeta-alanine (tingles)Vegan
Caffeine-free training formula with full pump and endurance dosing.
Key ingredients: Citrulline Malate, Beta-Alanine, Betaine Anhydrous, BCAA 2:1:1, Huperzine A
Ghost Pump Non-Stim Pre-Workout$39.99
Stimulant-freeNo beta-alanineVegan
Stimulant-free nitric oxide product — pumps without caffeine or beta-alanine.
Key ingredients: L-Citrulline, Arginine Nitrosigine, GlycerSize, Norvaline, Astragin
RAW Pump Non-Stim Pre-Workout$39.99
Stimulant-freeNo beta-alanine
Pure stimulant-free pump product — no caffeine and no beta-alanine tingles.
Key ingredients: L-Citrulline, GlycerPump, Nitrosigine, Agmatine Sulfate, VasoDrive-AP

How to choose between them

With caffeine off the table, three things separate this shortlist:

Creatine — 1 of the 5: Gorilla Mode Nitric Stim-Free Pre-Workout. Worth the extra few dollars if you would otherwise be taking creatine as a separate scoop.
Beta-alanine — 3 of the 5 leave it out: Gorilla Mode Nitric Stim-Free Pre-Workout, Ghost Pump Non-Stim Pre-Workout, RAW Pump Non-Stim Pre-Workout. Start here if the prickling is part of why you are on this page.
Diet — 3 of the 5 are vegan: Legion Pulse Caffeine-Free Pre-Workout, Transparent Labs Stim-Free Pre-Workout, Ghost Pump Non-Stim Pre-Workout. The full vegan shortlist covers the stimulant options too.

Pick the caffeine question at the top of our quiz and every stimulant product is filtered out before anything is scored — the same hard filter, not a ranking nudge — then the rest of your answers decide the order.

Find my stim-free pre-workout

Stim-free is not the same as tingle-free

These get confused constantly. Caffeine is the stimulant; beta-alanine is the ingredient that makes your face and hands prickle, and it turns up in caffeine-free formulas just as often as in stimulant ones. If the tingling is the thing you are trying to avoid, read the best pre-workouts without beta-alanine instead — and if you want to avoid both, the overlap is Gorilla Mode Nitric Stim-Free Pre-Workout, Ghost Pump Non-Stim Pre-Workout, RAW Pump Non-Stim Pre-Workout.

Those are the two ingredients behind most of what gets reported; pre-workout side effects walks the rest of the list back to the ingredient responsible, including the stomach complaints that a caffeine-free formula does nothing about. That last point matters most before breakfast: on an empty stomach the pump ingredients left behind in a stim-free formula are the ones doing the damage, so dropping the caffeine can leave the problem exactly where it was.

Frequently asked questions

What does "stim-free" mean on a pre-workout label?: It means the formula contains no caffeine or other central-nervous-system stimulants. Everything else a pre-workout usually does — the nitric-oxide "pump" ingredients, the endurance and hydration ingredients, the focus ingredients that are not stimulants — can still be there. "Non-stim", "caffeine-free" and "pump" products are all describing the same idea.
Do stim-free pre-workouts actually do anything?: They do a narrower job. The blood-flow ingredients most of them are built on — citrulline and its relatives — do not need caffeine to work, so the pump and the training-volume side of a pre-workout survives. What you give up is caffeine itself, which is one of the best-evidenced performance supplements there is, mostly through alertness and a lower sense of effort. If you want that effect, a stim-free product is not a substitute for it.
Will a stim-free pre-workout still make me tingle?: Only if it contains beta-alanine, which is a separate ingredient from caffeine and is what causes the prickling. Of the 5 caffeine-free products we track, 3 are also beta-alanine-free: Gorilla Mode Nitric Stim-Free Pre-Workout, Ghost Pump Non-Stim Pre-Workout, RAW Pump Non-Stim Pre-Workout. Stim-free does not automatically mean tingle-free.
Can I take a stim-free pre-workout before an evening workout?: That is one of the main reasons people use them. Caffeine has a half-life of roughly five hours in most people, so a late-afternoon or evening dose can still be measurably in your system at bedtime. A caffeine-free formula avoids that problem entirely.
Which pre-workouts have no caffeine?: In the Pick My Pre catalog: Gorilla Mode Nitric Stim-Free Pre-Workout, Legion Pulse Caffeine-Free Pre-Workout, Transparent Labs Stim-Free Pre-Workout, Ghost Pump Non-Stim Pre-Workout, RAW Pump Non-Stim Pre-Workout.

Informational only, not medical advice — see our Terms of Service. Pre-workouts are not appropriate for everyone; talk to a healthcare professional before starting one.