NutraBio PRE Workout Stimulant Free

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Stimulant-free pre-workout powerhouse to help amplify your performance.

  • Maximize power, strength, and explosiveness each set
  • Experience mind-blowing muscle pumps and volumization
  • Enhance muscular endurance to push harder when training
  • Boost performance and recovery to improve and accelerate results
  • Supercharge mental focus to support the mind-muscle connection
  • The perfect stim-free pre-workout formula for use during the day or at night


NutraBio PRE Stim-Free is the stimulant-free version of our best-selling PRE formula. PRE Stim-Free is the perfect solution for those individuals who want a stimulant-free pre-workout to use at night that won’t disrupt their ability to sleep or who are sensitive to ingredients such as caffeine.

PRE Stim-Free is absolutely the most thorough, effective, and purest stimulant-free pre-workout in existence. PRE Stim-Free is built upon clinically dosed and scientifically backed ingredients proven to maximize workout performance and produce results. Athletes of all levels realize that strength, endurance, and focus are a must to achieve the most effective training session.

The synergistic combination of ingredients found in PRE Stim-Free help prepare your body physiologically and psychologically by supporting increases in muscular strength, power, and endurance, enhancing the mind-muscle connection, and combatting fatigue. From top to bottom, PRE Stim-Free will help keep you training stronger and longer without the need for stimulants.



NutraBio PRE Stim-Free combines powerful and patented ingredients to provide unrivaled muscle pumps and volumization. This stimulant-free pre-workout will leave you doing a double-take in the gym mirror as you pass by.


Both strength and power are necessary to overload the muscles through progressive overload. PRE Stim-Free will help you take your performance and workout intensity to a level you never imagined.


To get the job done in the gym, you need to keep your eye on the prize. This stimulant-free pre-workout can help you get and stay dialed during your training session. With a solid mind-muscle connection, you can better activate those hard-to-reach muscle fibers to help spark new muscle growth


PRE Stim-Free contains key electrolytes and minerals that help preserve proper cellular hydration that can not only aid in muscle pumps but also maintain heightened performance to keep the intensity high throughout the workout without hitting the wall early.


L-Leucine: An essential amino acid used to boost protein synthesis and help increase ATP to be used as energy.

Beta-Alanine: This common yet potent ingredient can increase performance, reduce fatigue, heighten focus, elevate muscular endurance, and supports muscle growth.

Creatine Monohydrate (PharmaPure™): A patented ingredient that may support muscle growth, improve performance, boost strength, and increase energy.

Betaine Anhydrous: This powerful ingredient is beloved by all thanks to its ability to help improve power, enhance muscle pumps, improve hydration, and support protein synthesis.

Magnesium Creatine Chelate (Creatine MagnaPower): A patented form of creatine that has been shown to help increase the bioavailability of creatine and magnesium, increase ATP production, support muscle growth, improve cellular hydration, enhance performance, boost strength, and reduce muscle soreness.

L-Citrulline: Found to support athletic performance and increase plasma levels of arginine to improve vasodilation, blood flow, muscle pumps, and nutrient transport.

Agmatine Sulfate: A unique ingredient that aids in nutrient partitioning, allowing the body to store and utilize glycogen for workouts, increase nitric oxide production, and enhance blood flow to maximize muscle pumps.

Inositol-Stabilized Arginine Silicate (Nitrosigine®): A patented ingredient that can increase nitric oxide production to improve blood flow and enhance muscular pumps.

L-Tyrosine: An amino acid used by athletes and exercisers to increase energy and endurance.

Choline Bitartrate: A powerful ingredient that can help with overall brain function, memory, and can also improve mental focus.

Huperzine A: This toothed clubmoss has been found to aid in brain function and can help improve memory.

Taurine: Research has shown that this amino acid can help increase strength, reduce muscle fatigue, heighten concentration, and supports hydration.

Calcium Potassium Phosphate Citrate (Calci-K): A patented ingredient that combines calcium, potassium, and phosphorus into one easily absorbed complex. Calci-K plays a role in proper hydration and can also optimize muscle contraction.

Sodium Phosphate: Plays a role in reducing muscle cramps, minimizes muscle pain, improves muscle acidity, and can increase the amount of oxygen available for the muscles during workouts.


What is the best way to take PRE Stim-Free?

  • Mix one heaping scoop of PRE into 12-14 ounces of water and consume 30-45 minutes prior to training.

Aren’t stimulants the only thing that make pre-workouts effective? Why wouldn’t you put them in the formula?

  • Absolutely not. While there is no doubt that certain stimulants, such as caffeine, can improve performance, they are not the only ingredients in a pre-workout that provide an ergogenic benefit. For example, the creatine found in PRE Stim-Free is the most studied and effective performance-boosting supplement ever and is not considered a stimulant. We left stimulants out of this formula to accommodate individuals who are sensitive to stimulants, hit the gym late at night, or otherwise want a performance-enhancing pre-workout without stimulants.

I heard creatine can cause kidney problems and cause cramping. Is that true?

  • Absolutely not. Creatine is the most studied and effective supplement ever... period. Over 500 studies have been done on creatine, and none have shown to cause any adverse side effects. However, you should expect to see big improvements in strength, power, and endurance after taking creatine.

What makes PRE Stim-Free better than other stimulant-free pre-workouts?

  • A lot of other stimulant-free pre-workouts use ingredients that are ineffective or not properly dosed. All the ingredients in PRE Stim-Free are research backed and dosed efficaciously based on the current scientific literature.