Pre-workouts are dietary supplements that are designed to give you that extra energy, push and focus in the gym. However, most of them are stuffed with stimulants like caffeine and could give you remarkable adverse effects like insomnia and jittery feeling.

People like to use stimulant free pre workouts because they will give you the nutrients to provide you with a killer workout. Most of these stim-free pre workouts are known to provide you with an insane muscle pump and vascularity.

Stim free pre-workouts are a perfect solution for people who train at night or have a workout directly before going to bed. Stimulants are there to give you energy and focus, and they work very well. But, after they’ve worked out, you will feel tired and in need of more.

Top 5 Stimulant Free Pre Workouts

Below we will reveal the top 5 most beneficial stim free pre workouts without absolutely zero caffeine. These products have been thoroughly selected based on ingredients, dosage, pricing, servings, and our own experience.

A brief summary:

  1. Pump Serum by Huge Nutrition – Check Price
  2. PreSeries Stim-Free Pre Workout – Check Price
  3. Magnify NO-Booster – Check price
  4. Pumped AF by STEEL
  5. Insane Veinz

If you’re interested in learning why we choose these products, you can find the individual reviews below.

Price range guide

$ = between $25 to $30

$$ = between $30 to $45

$$$ = $45 and up

#1 Pump Serum (Best Overall)

Try Out Pump Serum Today – Click here

Pump Serum is a stim-free pre-workout by Huge Nutrition and is known for its highly and clinically dosed ingredients. With Pump Serum, they emphasize quality over quantity. This pre-workout is entirely empty of any stimulants and is mainly focused on increasing nitric oxide.

It sets itself apart from the others because all ingredients are added with the correct dosage. Most products add many ingredients, but with a shallow dose, it hardly has any effect.

Pump Serum contains ten(10) key ingredients that will help you increase muscle pumps, focus, power, and performance.

Key features

  • Clinically Dosed Ingredients
  • Increased Nitric Oxide For Blood Flow
  • Boost Performance
  • Tunnel Vision Focus
  • Insane Muscle Pumps


  • Limited Flavors
  • 25 servings


1 Serving: 16 Grams

  • 3000mg Glycerpump
  • 2500mg Betaine Anhydrous
  • 1500mg Agmatine Sulfate
  • 1000mg Beet Root Extract
  • 1000mg L-Tyrosine
  • 980mg Choline Bitartrate
  • 1000mg Pomegranate Extract
  • 400mg Pink Himalayan Sea Salt
  • 254mg Vasodrive AP
  • 200mcg Huperzine A

Price: $$


If you’re looking for the best pre workout without stimulants, we would highly suggest trying out Pump Serum. It contains all the necessary ingredients to give you an insane workout full of pumps and performance.

#2 PreSeries Stim-Free Pre Workout


Try Out Stim-Free Today – Click here

Transparent Labs Stim-Free is a highly anticipated pre-workout without any stimulants. It got a massive dosage of 21.4 grams per scoop, which is a lot if we compare it to the others. Some notable ingredients they’ve used in this pre-workout are Citrulline Malate and Beta-Alanine, associated with improved performance and blood flow(1).

Stim-Free includes 13 key ingredients that will help you crush your workout.

Key features

  • 23grams Per Scoop
  • No Artificial Sweeteners, Coloring, and Preservatives
  • Increased Blood Flow for Muscle Pumps
  • Added BCAA’s For Recovery
  • Enhanced Absorption


  • No Added Focus Ingredient
  • Highest Price


1 Serving: 21,4Grams

  • 6000mg Citrulline Malate 2:1
  • 4000mg BCAA 2:1:1
  • 4000mg Beta-Alanine
  • 2500mg BetaPure
  • 1300mg Taurine
  • 600mg N-Acetyl L-Tyrosine
  • 500mg Choline Bitartrate
  • 150mg ElavATP
  • 70mg Macuna Pruriens
  • 60mg L-Norvaline
  • 5mg Bioperine

Price: $$$


This stim-free pre-workout is a perfect supplement to help you get through your workout. Unforuttnaly, we are missing some focus ingredients, and that’s why it’s placed second.

#3 Magnify NO-Booster (Best For Pump)

Try Out Magnify Today – Click here

Magnify is a nitric oxide boosting supplement that is believed to be the best pre-workout for pumps. It’s a bit different than the other products on this list. However, that doesn’t mean it’s not suited as a fantastic supplement before working out. Most users noticed increased vascularity and skin tearing muscle pumps. They mentioned that stacking this with Pump Serum will give you the best workout you ever had.

Key features

  • Insane Muscle Pumps & Vascularity
  • Science-Backed
  • Easy To Take
  • Explosive Workouts
  • Increased NO production


  • The main focus is on pumps and vascularity


1 Serving: 5 Capsules

  • 1000mg Beet Root Extract
  • 1000mg L-Arginine Complex
  • 500mg Pomegranate Extract
  • 1000mg L-Citrulline
  • S7 50mg

Price: $$


This product is perfect for people that are just looking to get a massive pump and increase vascularity. It’s easy to take since it comes in capsules and can be stacked with any other stim-free pre-workout.

#4 Pumped AF by STEEL

In fourth place, we have Pumped AF by STEEL, a muscle pump, fullness, and endurance supplement. It’s a caffeine-free pre-workout that can be used as a muscle hydrator. The most important thing to know about Pumped AF is that it contains an ingredient called N.O.7, a patented blend, and most-likely is added to increase Nitrix Oxide.

Key features

  • No Stims Added
  • Hydrates The Muscles
  • Added Creatine


  • Clumping
  • Not a full transparency label


1 Serving: 18 Grams

  • 1000mg Beet Root Extract
  • 1000mg Agmatine Sulfate
  • 2500mg Betaine Anhydrous
  • 750mg Kre-Alkalyn
  • 6000mg L-Citrulline
  • 2000mg Glycersize
  • 400mg N.O.7 Formula

Price: $$$


It’s a great product and will give you everything you need from a stim-free pre-workout. However, the price is relatively high. So if you don’t mind min spending a bit more than Pumped AF is excellent for you.

#5 Insane Veinz (Best For Vascularity)

Insane Veinz by Insane Labs completes this list. This stim-free supplement is the best pre workout for vascularity. It contains a blend of ingredients like HydroMax® and Nitrosigine® that are both patented and known to increase blood flow. It’s not as good as Pump Serum or Stim-Free, but it definitely belongs on this list. On their website, they claim that this is perfect for stacking with other pre-workouts; however, this product already costs $64.95.

Key features

  • Increased Vascularity
  • Enhanced Pumps
  • Insane Blood Flow


  • Proprietary Blend
  • Not many ingredients
  • Low dosages


1 Serving: 6,2 grams

  • 200mg Chloride
  • 200mg Sodium
  • 3275mg Insane Veinz Gold Blend

Price: $$$


We would advise using Insane Veinz as your non-stim pre-workout if you’re just looking to get vascular. It’s an expensive product with limited ingredients, with other products on this list you more for your money.

What to look for in a Stim Free Pre Workout?

The most important things you need to look for in a stim-free pre-workout are the following details:

  • Blood Flow Ingredients (mainly N.O. Boosters)
  • Focus Ingredients
  • Endurance Ingredients
  • Strength Increasing Ingredients

These four elements are the most essential since that is what you would want from a non-stim pre-workout. A pre-workout needs to give you that focus, power, and pump. Since it doesn’t contain stimulants, you miss most of the energy effects. So it is important to focus more on the pump, blood flow, and endurance ingredients.

Here are a couple of ingredients to look for:

  • Betaine Anhydrous
  • Beet Root
  • Glycerol Powder like: Glycerpump
  • L-Tyrosine
  • L-Citrulline
  • Agmatine sulfate
  • Sodium like: Himalayan Sea Salt
  • Nootropics like: Huperzine A or Alpha GPC

There are more ingredients to mention, but you are good to go if a product contains those ingredients.

Side Effects

Stim free pre-workouts are generally considered to be safe. The most known ingredients to cause side effects in pre-workouts are stimulants since they work on your nervous system and cause insomnia. However, these non-stim pre-workouts do not contain stimulants.

Every person reacts differently to certain ingredients, so it could be that some people get an adverse effect, but this is not very common. I’ve searched the internet for adverse effects, but those were scarce.

Most ingredients used are either from fruits and plants or are naturally occurring in your body. To get a negative effect from these ingredients, you would need to take a large dosage.

This doesn’t mean that it’s completely side effects free. Some users reported the following side effects when using stim-free pre workouts:

  • Nausea
  • Upset Stomach
  • Diarrhea
  • Dehydration
  • Jittery

If you’re not sure if you can take these supplements, always make sure to contact a health professional or dietician.

The Bottom Line

Stim-free pre-workouts are great supplements to help you get through your workout. They contain ingredients that will  give you better muscle pumps, endurance, power, and more.

When looking for an excellent stim-free pre-workout, it’s advised to look at the ingredients, effects, reviews, and pricing. We concluded that Pump Serum by Huge Nutrition is the best stim free pre workout on the market.

This list is a good starting point for finding a good non-stim pre workout that fits your needs.

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