Best Stim-Free Pre-Workout (2026): An Honest Buyer's Guide

By the Muscleology Editorial Team | Updated November 2026

The short answer: the best stim-free pre-workout is the one that puts real doses of the ingredients that work without caffeine on the label: about 6–8 g of citrulline for pumps, 3.2 g or more of beta-alanine for endurance, about 2.5 g of betaine, and, if you want strength over months, a full 5 g of creatine. Few formulas hit all four. Below we rank the most popular stim-free pre-workouts of 2026 on exactly those numbers, show you where each one falls short (ours included), and tell you which to buy for pumps, for night training, or for an all-in-one with creatine.

What makes a stim-free pre-workout actually work

Caffeine makes you feel ready. The ingredients below make your muscles more capable, and none of them touch your sleep. If a stim-free formula doesn't dose these properly, it's mostly flavoring.

Citrulline: 6–8 g for blood flow and extra reps

L-citrulline raises blood arginine more reliably than arginine itself, which supports nitric oxide production and blood flow. In one study, 6 g a day of L-citrulline for seven days improved high-intensity exercise tolerance (Bailey et al., 2015). Formulas using citrulline malate (2:1) typically use 6–8 g. Be realistic: pooled research shows a modest bump, a few extra reps near failure, not a different workout.

Beta-alanine: 3.2 g+ for endurance (taken daily)

Beta-alanine raises muscle carnosine, which buffers acid during hard efforts that last roughly one to four minutes. The International Society of Sports Nutrition recommends 4–6 g per day for at least two to four weeks (ISSN position stand, Trexler et al., 2015). It builds up over time, so the dose you take every day matters more than the timing. The harmless tingle is beta-alanine. More on that in why pre-workout makes you itchy.

Betaine: about 2.5 g

Betaine anhydrous supports cellular hydration. A six-week trial using 2.5 g a day in trained men reported improved body composition and bench-press work capacity (Cholewa et al., 2013). Most studies use 2.5 g, so that's the number to look for.

Creatine: 3–5 g a day, the one with the most evidence

Creatine monohydrate is the most researched strength supplement there is. The ISSN supports 3–5 g per day for ongoing use (ISSN position stand, Kreider et al., 2017). It works by saturating your muscle stores over weeks, not by kicking in before a set, so it doesn't have to be in your pre-workout. But if it is, you need one less tub. See when to take creatine.

The 2026 stim-free pre-workout comparison table

Doses are per full serving as published on each brand's label. Competitor doses and prices are approximate, as of November 2026. Formulas and prices change, so always check the current label before you buy.

Product	Citrulline	Beta-alanine	Betaine	Creatine	Approx. price*
Transparent Labs Stim-Free	8 g (citrulline malate 2:1)	4 g	2.5 g	None	~$49
Legion Pulse Caffeine-Free	8 g (citrulline malate)	3.6 g	2.5 g	Check current label	~$45
Kaged Pre-Kaged Stim-Free	8 g	3.2 g	2.5 g	None	~$45
Gorilla Mode Nitric	10 g	None	2.5 g (betaine nitrate)	None	~$49
Nutricost Stim-Free	6 g	3.2 g	None	None	~$28
Muscleology Category5	None	1.6 g	300 mg	5 g monohydrate	$44.99

*Approximate list price, as of Nov 2026; check labels and retailers for current pricing. Sources: Transparent Labs product page; label summaries from Gymnasetips and RepReturn (2026); Muscleology Category5 label.

Our picks for 2026

Best overall: Transparent Labs Stim-Free

This one clears all three non-creatine benchmarks in a single scoop: 8 g citrulline malate, 4 g beta-alanine and 2.5 g betaine, plus taurine and L-tyrosine. It's naturally sweetened, and the brand publishes third-party test results. Downside: no creatine, so you'll still need a separate tub, and it's one of the pricier options per serving.

Best for pumps: Gorilla Mode Nitric

If what you want is the pump, this is built for it: 10 g citrulline plus betaine nitrate and agmatine. Downside: no beta-alanine, so you get no endurance buffering, and no creatine.

Best budget clinical dose: Nutricost Stim-Free

You get 6 g citrulline and 3.2 g beta-alanine at roughly $1 a serving (approximate, as of Nov 2026). That's the floor of the effective range for both, with no extras. Downside: no betaine, no creatine and basic flavors.

Best stim-free pre-workout with a full 5 g creatine: Muscleology Category5

We make it, so here's exactly what it is and isn't. Category5 is a stim-free formula built around a full 5,000 mg of creatine monohydrate per scoop, the full daily dose most pre-workouts skip or underdose. It also has 1,600 mg beta-alanine, 300 mg betaine, 300 mg vitamin C and 200 mg magnesium citrate, all printed on the label with no proprietary blend. It has zero caffeine, so evening sessions are fine.

What it isn't: a pump formula. There's no citrulline, and the beta-alanine and betaine are below the doses used in the studies above. If you want creatine, steady endurance support and no stimulants from one $44.99 scoop, Category5 makes sense. If you want maximum pump, pick Gorilla Mode or Transparent Labs and take Pure Power creatine separately.

Best with focus ingredients: Legion Pulse Caffeine-Free

Fully dosed citrulline, beta-alanine and betaine, plus alpha-GPC for focus. That covers the one thing caffeine usually handles. Downside: a big scoop and a premium price.

Stim-free pre-workout with creatine: is it worth combining?

Convenience is the main argument. Creatine works the same whenever you take it, so bundling it in your pre-workout doesn't make it work better. It just means one scoop instead of two. If you already take creatine every day, buy a pump-focused stim-free and keep your creatine separate. If you keep forgetting your creatine, a formula like Category5 fixes that. Either way, aim for about 5 g a day total, and don't double up. More on combining the two in pre-workout with creatine.

Who should choose a stim-free pre-workout

• Evening trainers. Caffeine's half-life averages around five hours, so a 6 p.m. pre-workout can still be in your system at bedtime. Poor sleep undercuts recovery.
• Caffeine-sensitive lifters who get jitters, a racing heart or an upset stomach from stimulant formulas.
• People cycling off caffeine to reset their tolerance without losing their training support.
• Coffee drinkers who already get their caffeine and don't want to stack more on top. Stim-free lets you keep your coffee.

Women training for strength and body composition have the same options. See our stim-free pre-workout guide for women. Pregnant or nursing, on medication, or managing a medical condition? Talk to your doctor before using any pre-workout.

How to choose: a 30-second decision guide

1. Want the biggest pump? Look for 8–10 g citrulline (Gorilla Mode Nitric, Transparent Labs).
2. Want endurance for high-rep or conditioning work? Make sure there's at least 3.2 g beta-alanine, and take it daily.
3. Want strength gains over months with one less tub? Pick a formula with a full 5 g creatine (Category5), or add Pure Power to any stim-free.
4. On a budget? Nutricost covers the basics. Compare cost per serving, not cost per tub.
5. See a "proprietary blend"? Skip it. If the doses aren't printed, you can't compare them. Our stim-free label checklist walks through it.

How to take a stim-free pre-workout

Mix one scoop with 8–12 oz of cold water about 20–45 minutes before training. Citrulline needs time to work. Beta-alanine and creatine build up over weeks, so take them on rest days too. Start with half a scoop if you're new to beta-alanine and the tingle bothers you. Stim-free formulas are generally fine to use daily at the labeled dose. Wondering how long the effects last? See how long pre-workout lasts.

Frequently Asked Questions

What is the best stim-free pre-workout?

For full clinical doses of citrulline, beta-alanine and betaine in one scoop, Transparent Labs Stim-Free is our top pick. For the biggest pump, choose Gorilla Mode Nitric. If you want a full 5 g of creatine without stimulants, choose Muscleology Category5.

Do stim-free pre-workouts actually work?

Yes, for what they target: blood flow, endurance and, with creatine, strength over time. They won't give you caffeine's buzz, and the effect of any single ingredient is modest. Proper doses are what matter.

Is there a stim-free pre-workout with creatine?

Yes. Category5 has 5,000 mg of creatine monohydrate per scoop. Most other stim-free formulas leave creatine out, so check the panel if you want it included.

Can I take a stim-free pre-workout at night?

Yes. A caffeine-free formula has no stimulants to interfere with sleep, which is why evening trainers are the biggest group of stim-free users.

Can I drink coffee with a stim-free pre-workout?

Yes. That's one of the main reasons to choose stim-free: you control your caffeine separately. Stay within the FDA's general guidance of about 400 mg of caffeine a day for healthy adults.

Why does my stim-free pre-workout make me tingle?

That's beta-alanine. The tingling (paresthesia) is harmless and fades within about an hour. Splitting the dose or using half a scoop reduces it.

Is stim-free pre-workout worth it?

If you train late, are sensitive to caffeine, or already drink coffee, usually yes, as long as it's properly dosed. Our honest take is in is pre-workout worth it.

Related guides

• Stim-Free Pre-Workout: What to Look For
• Pre-Workout Ingredient Guide
• Best Pre-Workout 2026: Stim and Stim-Free Compared
• C4 Pre-Workout Alternative
• Best Creatine Monohydrate (2026)
• ¿Cuánto dura el pre entreno?
• Shop Category5 Stim-Free Pre-Workout

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.