Transparent Labs’ PreSeries STIM-FREE Pre Workout Supplement


PreSeries Stim-Free is a preworkout formula made by the team at Transparent Labs. The formula claims to be the most exceptional stimulant-free preworkout supplement on the market. Here’s our review.

What is PreSeries Stim-Free Pre-Workout?

PreSeries Stim-Free is a preworkout supplement designed to help boost your energy and performance before you hit the gym. Unlike many other preworkouts on the market today, PreSeries Stim-Free contains absolutely no stimulants – so there’s no caffeine or other ingredients.

Instead of stimulants, PreSeries Stim-Free boosts your energy using ingredients like citrulline malate, beta-alanine, betaine, creatine, and taurine. Transparent Labs describes that all of these ingredients are included “at clinically effective dosages”.

The supplement is targeted towards anyone who is intolerant of caffeine and other stimulants. It’s also targeted towards those who want to reduce their caffeine consumption or cycle off the stimulant.

Since there’s 3 grams of creatine per serving, PreSeries Stim-Free is also recommended for more serious bodybuilders and athletes who are preparing for an intense workout. This isn’t the formula you take before hopping on the treadmill for some medium-intensity cardio for half an hour.

PreSeries Stim-Free seems like a legitimate preworkout formula with no stimulants. Does it live up to the hype? Let’s take a closer look at how it works.

How Does PreSeries Stim-Free Work?

Transparent Labs lives up to its name by giving us complete transparency with the PreSeries Stim-Free ingredients. While other manufacturers hide dosages behind proprietary formulas, PreSeries Stim-Free gives us all of the information we need to make an informed decision.

PreSeries Stim-Free is also one of the few supplements that uses an adequate dose of amino acids like citrulline malate. Many supplements on the market use amino acid doses under 1,000mg – which is too small to have any major effect on your body. PreSeries Stim-Free, on the other hand, uses a whopping 6,000mg of citrulline malate (2:1) along with an additional 4000mg of BCAA matrix (2:1:1).

As mentioned above, there’s also 3,000mg of creatine in the formula to help ensure your muscles stay hydrated – and achieve maximum lean muscle growth – throughout your workout.

PreSeries Stim-Free also contains some additional unique ingredients, which we’ll talk about below:

-500mg of Choline Bitartrate: This ingredient is typically seen in cognitive enhancements supplements. Choline plays a crucial role in how our brain forms new memories. In PreSeries Stim-Free, it’s expected to increase focus and overall cognition – so you can stay in the zone throughout your workout.

-70mg of Mucuna Pruriens (98% L-Dopa): This compound has been found to work against your body’s natural stress reactions. Mentally, this gives you a feeling of peace of mind. Physically, this reduces cortisol levels in your body, promoting healthy testosterone levels and increasing growth hormone levels.

-60mg of L-Norvaline: This compound reduces arginase activity in the body. Through a chain reaction, this helps your body increase its nitric oxide levels, which means your blood vessels get wider.

-2500mg of BetaPure (Betaine Anhydrous): This supplement has been shown to trigger a significant muscle growth response in recent clinical trials. The makers of PreSeries Stim-Free cite several trials where the compound reduced fatigue when taken before and after weight training while also complementing the effects of creatine.

Ultimately, PreSeries Stim-Free is very transparent about its ingredients, listing all of its ingredients directly on the packaging and on the official website.

PreSeries Stim-Free Ingredients

Here’s what the full list of ingredients inside PreSeries Stim-Free looks like:

-6,000mg of Citrulline Malate 2:1

-4,000mg of BCAA 2:1:1 (Instantized)

-4,000mg of Beta-Alanine

-3,000mg of Creatine HCl

-2500mg of BetaPure Betaine Anhydrous

-1300mg of Taurine

-600mg of N-Acetyl L-Tyrosine

-500mg of Choline Bitartrate

-70mg of Mucuna Pruriens (98% L-Dopa)

-60mg of L-Norvaline

-5mg of BioPerine (Black Pepper Extract with 95% Piperine)

-Other Ingredients: 600mg of stevia, 300mg of “blue raspberry flavor”, 250mg of calcium silicate, and 250mg of silicon dioxide

The dosages above are for one scoop (23.44g). There are 30 scoops (30 servings) in each container.

There are two flavors for PreSeries Stim-Free, including Blue Raspberry and Green Apple. The Green Apple formula has an identical list of ingredients except for the flavoring, which consists of 275mg of green apple flavor.

We appreciate that Transparent Labs is transparent about its ingredients, but we would have liked to know what the “green apple flavor” and “blue raspberry flavor” actually is.

PreSeries Stim-Free Pricing

PreSeries Stim-Free is available at the following prices:

-1 Tub (30 Servings / 30 x 23.44g Scoops): $49

-2 Tubs: $89

-3 Tubs: $119

What Do Customers Have to Say About PreSeries Stim-Free?

PreSeries Stim-Free is generally well-reviewed online, with many people agreeing that it’s one of the best – if not the best – caffeine-free preworkouts on the market today.

Thus far, the formula has an average rating of 5 stars out of 5 on the official Transparent Labs online store, which appears not to screen its reviews too heavily. In any case, customers say things like:

-Great for evening workouts when you don’t want to take a lot of caffeine but still want lots of energy for your workout

-Tingly, energetic sensation with better pumps and no jitters or crashing

-Still have lots of energy to push to the very end of the workout, similar to preworkouts with caffeine

-Tingly feeling in the hands and face after taking the recommended amount, although that goes away after 10 minutes or so

-Gets pretty foamy after mixing

-Taste is pretty bad

Overall, “taste” is the only major downside that multiple reviewers online have complained about. Some people claim they’re used to guzzling preworkouts – but they struggle to do that with PreSeries Stim-Free due to the taste. As mentioned above, we don’t actually know how PreSeries Stim-Free is flavored as the specific flavoring compounds are not listed.

About Transparent Labs

PreSeries Stim-Free is made by Transparent Labs, a nutritional supplement retailer found online at As you may have guessed from the name, Transparent Labs was founded with the goal of bringing transparency back to the supplement industry. They also take pride in using all-natural sweeteners (usually stevia), zero food dyes, and no fillers or harmful additives.

The company was founded by Matt Bockenstette.

Some of the most popular Transparent Labs supplements include other products in the PreSeries lineup, like PreSeries BULK Pre-Workout and LEAN Pre-Workout. They also have a “StrengthSeries” and “CoreSeries” lineup of supplements.

You can contact the company by phone at 949-357-1711 or by email form here.

Should You Take PreSeries Stim-Free Preworkout?

PreSeries Stim-Free is a powerful preworkout formula that comes with a hefty dose of all the ingredients you like to see – including amino acids, nootropic ingredients, creatine, and natural stimulants like taurine.

The supplement is very well-reviewed online and all dosage information is 100% transparent – so we know exactly what’s in PreSeries Stim-Free. The only real downside of the supplement, according to reviews, is the taste, which can take a while to get used to.

If you don’t mind an odd taste and are looking for a powerful stimulant-free preworkout, then PreSeries Stim-Free is one of the best on the market today.

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