Animal Pump Pre-Workout Stim-Free Powder: The Complete Stim-Free Experience

Animal Pump Pre-Workout Non-Stim! Full clinical doses of Citrulline (6g), Nitrosigine (1.5g), Beta-Alanine (3.2g), and more for maximum pumps without caffeine. Perfect for evening training or stacking with stims.

In a big April 2025 month that also includes several new flavors across its product line, the Animal brand continues its legendary run of action-packed supplements with their latest offering: Animal Pump Pre-Workout Non-Stim. This comprehensive, stimulant-free formula is designed to deliver maximum pumps, performance, and focus without the caffeine crash or jitters that can come with traditional pre-workouts.

Animal Pump: Now in a Stimulant-Free Powder Pre-Workout!

For anyone who trains in the evening, is sensitive to stimulants, or simply wants to stack a dedicated pump product with their regular pre-workout, Animal Pump offers the perfect solution. Building on the foundation that made Animal a household name in the supplement industry since 1983, this formula brings together clinically-dosed ingredients specifically engineered to enhance blood flow, muscle fullness, endurance, and mental focus.

The Animal brand has been on an absolute tear lately, releasing impressive products like Animal Primal and the much-loved Animal Creatine Chews. Now, they’ve turned their attention to creating the ultimate stim-free pre-workout experience.

Before diving into the details, make sure you’re signed up for PricePlow’s Animal news alerts and check our coupon-powered deals on Animal Pump below:

Animal Pump Ingredients

Each 2-scoop (22g) serving of Animal Pump has:

• Pump & Performance Complex

  One thing to note right off the bat is that we have another Animal pre-workout that has both citrulline and arginine, just like the original Animal Pump pills and the now-discontinued Animal Pump Pro supplement. There’s synergy here, as discussed in our article titled “How Citrulline and Arginine Work TOGETHER for an Animal Pump“.

  • L-Citrulline – 6g

    Leading off Animal’s pump complex is a beyond-clinical 6-gram dose of L-Citrulline, which is exactly what we want to see in a premium non-stim pre-workout. This amino acid is the gold standard for pump ingredients, and Animal didn’t skimp on the dosage.

    L-Citrulline works by increasing plasma arginine levels in your body, which then boosts nitric oxide production.^[1] This process is what gives you those skin-splitting pumps during training. What makes citrulline so effective is that, unlike supplementing with arginine directly, citrulline bypasses the liver’s first-pass metabolism and avoids excessive breakdown by the enzyme arginase.^[2]

    The 6-gram dose here is significant because research shows that saturation of citrulline’s benefits starts to occur around the 10-gram mark, with linear increases in arginine plasma levels up to that point.^[3] So at 6 grams, we’re getting substantial nitric oxide benefits without reaching the point of diminishing returns.

    In studies examining citrulline’s performance benefits, this 6-gram dosage has been shown to improve exercise tolerance, reduce fatigue, and enhance recovery between sets.^[4] You’ll notice the difference most during those high-volume training sessions where muscle fatigue typically sets in during later sets.

    What’s interesting is that the effects of citrulline go beyond just the pump. Research has shown it may help reduce post-exercise muscle soreness by up to 40% and significantly increase power output during training.^[5]

    

    We also appreciate that Animal included the free-form L-Citrulline rather than citrulline malate. While citrulline malate has its own benefits, pure L-Citrulline provides more of the active ingredient per gram and focuses specifically on the nitric oxide pathway. This means you’re getting the full 6 grams of what you want, not a mixture that contains less actual citrulline.

    When combined with the Nitrosigine® (another nitric oxide booster) in this formula, you’re getting a multi-pathway approach to vasodilation that should deliver noticeable and long-lasting pumps throughout your entire training session.

  • Nitrosigine® (Inositol-Stabilized Arginine Silicate) – 1.5g

    Animal Pump brings a full clinical dose of Nitrosigine, a patented^[6,7] complex that combines arginine, silicon, and inositol to create a powerful nitric oxide booster that outperforms standard L-arginine supplements for sustained pumps, improved blood flow, and enhanced performance.

    Unlike conventional arginine, which has poor bioavailability due to rapid breakdown in the liver, Nitrosigine leverages silicon and inositol to create a more stable, longer-lasting form of arginine. The result? Significantly better absorption and a dramatically extended effect window.

    Research shows that a single dose of Nitrosigine increases blood arginine levels within 30 minutes, with effects lasting up to 6 hours — far longer than standard arginine supplements.^[8,9] Once in the bloodstream, arginine serves as the primary precursor to nitric oxide, a signaling molecule that promotes vasodilation throughout the body, enhancing oxygen and nutrient delivery to working muscles.

    

    The benefits of Nitrosigine go beyond just pumps. Clinical studies demonstrate that this compound can:^[10-13]

    • Increase blood flow to working muscles through enhanced nitric oxide production
    • Improve perceived energy levels and reduce exercise-induced muscle damage
    • Enhance mental focus and cognitive performance under stress
    • Extend the duration of increased blood arginine levels compared to other arginine sources

    What’s also impressive about Nitrosigine is its cognitive benefits. Research shows it can improve mental performance and prevent exercise-induced cognitive decline – a benefit few other pump ingredients can claim.This makes it an ideal addition to a non-stimulant pre-workout, providing mental acuity without relying on caffeine or other stimulants.

    At 1.5g per serving, Animal Pump delivers the full clinically-studied dose shown to maximize these benefits. When combined with 6g of citrulline, the two ingredients work synergistically to enhance nitric oxide production through complementary pathways. While citrulline gets recycled to arginine in the kidneys, Nitrosigine provides a direct, sustained source of bioavailable arginine throughout your training session.

    For athletes who train in the evening or anyone sensitive to stimulants, this potent NO-boosting combo provides the vascular fullness, nutrient delivery, and enhanced mental focus needed for productive training without interfering with sleep or causing jitters.

  • Beta Alanine – 3.2g

    The new Animal Pump powder includes the full clinical dose of 3.2 grams of beta-alanine, which is exactly what we want to see in a premium pre-workout supplement. This powerhouse ingredient works by increasing muscle carnosine levels, which serves as one of your body’s primary intracellular pH buffers.^[14]

    

    When you’re pushing through those high-intensity sets, your muscles produce hydrogen ions (H+) that increase acidity and contribute to that burning sensation that forces you to stop. Carnosine helps neutralize these ions, allowing you to push harder and longer before fatigue sets in.^[15]

    The research on beta-alanine is rock solid, with studies consistently showing it improves performance in exercises lasting between 1-4 minutes… think those grueling sets of 8-12 reps or high-intensity interval training.^[16]

    Beta alanine does require consistent supplementation, though. Daily intake of beta-alanine for 4-6 weeks can increase muscle carnosine concentrations by up to 80%.^[17]

    Yes, beta-alanine can cause that tingling sensation (paresthesia) some people love and others hate, but it’s completely harmless and actually serves as a nice indicator that your pre-workout is kicking in.^[18]

    What’s really smart about Animal including beta-alanine in their stim-free formula is that you can supplement it at any time of day without worrying about sleep disruption, while still getting all its performance-enhancing benefits. The 3.2g dose is perfect – enough to be fully effective without excessive tingling that some higher doses might cause.

    By combining beta-alanine with the other endurance-focused ingredients in this formula, Animal Pump brings a complete package for pushing through those muscle-burning final reps when you need it most.

  • Betaine Anhydrous – 2.5g

    

    Animal Pump contains a solid 2.5-gram dose of betaine anhydrous (trimethylglycine), providing both performance and physique benefits that complement the formula’s pump-focused ingredients perfectly.

    First discovered in sugar beets, betaine serves as both a powerful osmolyte and a methyl donor in the body. As an osmolyte, betaine helps maintain cellular hydration and volume during intense training by protecting against the dehydrating effects of exercise.^[19] This cellular swelling creates an anabolic environment and contributes to muscle fullness during your workout.

    What makes betaine particularly valuable in this non-stim formula is its ability to enhance strength and power output without relying on stimulants. Research shows that 2.5g daily for 14 days can significantly improve muscle endurance, power production, and training volume.^[20] A recent study with 2.5g betaine showed improvements in both bench press and squat performance, with subjects able to complete more repetitions to exhaustion during high-volume training.^[21,22]

    The benefits don’t stop there. Betaine also acts as a methyl donor that helps lower homocysteine levels, potentially improving recovery and enhancing your body’s natural testosterone production.^[23] Studies have shown betaine supplementation can improve body composition over time, helping reduce fat mass while supporting lean mass gains.^[24]

    The 2.5g dose in Animal Pump Pre-Workout Stim-Free Powder is right in the sweet spot for clinical efficacy, making it a perfect addition to this comprehensive non-stim formula. Combined with the other performance ingredients, betaine helps ensure you’re getting maximum benefits from every training session, even without stimulants in the mix.

  • L-Taurine – 2g

    

    Animal Pump powder delivers a solid 2-gram dose of taurine, an amino acid that plays multiple crucial roles in exercise performance. While often overshadowed by flashier ingredients, taurine is actually one of the most abundant amino acids in muscle tissue and contributes significantly to your training results.

    What makes taurine special is its ability to enhance muscle function through several mechanisms. First, it acts as a cell volumizer, drawing water into muscle cells to create a fuller, more pumped appearance.^[25] This effect works alongside citrulline and Nitrosigine to maximize the pump from multiple angles.

    Taurine also significantly improves endurance capacity. A comprehensive meta-analysis showed that even a single dose of taurine (1-6g) can measurably improve endurance performance.^[25] This means better training volume and less fatigue during those grueling high-rep sets.

    For anyone hitting the weights without stimulants, taurine’s effects on muscle contraction efficiency are especially valuable. Research shows it helps regulate calcium flow within muscle cells, optimizing force production without requiring caffeine as a performance booster.^[26]

    Beyond performance, taurine serves as a powerful antioxidant and helps maintain proper electrolyte balance during intense training.^[27] This supports Animal Pump’s hydration complex, creating synergy between the ingredients for maximum training benefit.

    

    The 2-gram dose in Animal Pump hits the sweet spot for performance enhancement without reaching the point of diminishing returns. When combined with the other ingredients in this formula, taurine helps ensure that your stim-free pre-workout experience delivers not just impressive pumps, but also the stamina and muscle efficiency needed for a productive training session.

  • L-Tyrosine – 2g

    L-Tyrosine comes in at a solid 2-gram dose in Animal Pump, providing cognitive support in this stimulant-free formula. As an amino acid that serves as a precursor to dopamine and norepinephrine, tyrosine plays a crucial role in maintaining mental performance during stressful conditions.^[28]

    What makes tyrosine great in a non-stim pre-workout is its ability to support focus and mental clarity without the jittery effects of caffeine. When you’re pushing through intense training sessions, your brain burns through the above catecholamines (dopamine and norepinephrine) at an accelerated rate. Tyrosine helps replenish these neurotransmitters that would otherwise become depleted during high-intensity exercise.^[29]

    The 2-gram dose here is right in the sweet spot based on recent research. Studies show that tyrosine supplementation between 1-2 grams can effectively enhance cognitive performance, especially when the brain is under stress or facing demanding tasks.^[30]

    Unlike many ingredients that only work during specific stressors like cold exposure, tyrosine has been shown to improve several cognitive functions during everyday high-demand situations, including:

    • Working memory performance during mentally challenging tasks^[31]
    • Cognitive flexibility when switching between different mental tasks^[32]
    • Focus and attention when performing complex movements^[33]
    

    Animal Whey returns with new Cookies & Cream, delivering real cookie pieces in a premium protein blend! 20g protein, just 2g carbs/fat per scoop, and a perfectly balanced shake texture.

    For lifters who train in the evening or those sensitive to stimulants, the tyrosine in Animal Pump brings that mental edge without affecting sleep quality or causing the crash associated with caffeine-based pre-workouts. It works synergistically with the other focus-enhancing ingredients while supporting the pump effects through improved mind-muscle connection during your training.

• Electrolytes & Hydration Complex

  Finally, it’s time to keep the ions moving with our favorite two electrolytes, sodium and potassium:

  • Sodium – 125mg from Sodium Chloride and Sea Salt (5% DV)

    Animal Pump includes a strategic 125mg of sodium from high-quality sodium chloride and sea salt, providing 5% of your daily recommended value. It’s not a massive dose, it’s deliberately balanced for optimal performance without overloading your system.

    Sodium plays a crucial role in muscle contractions, nerve function, and (most importantly for your training) maintaining proper hydration and blood volume.^[34] During intense workouts, you lose significant sodium through sweat, which can compromise performance when not properly replaced.^[35]

    Sodium is useful in a non-stim formula because of its ability to enhance blood plasma volume, working synergistically with the pump ingredients to maximize vasodilation and nutrient delivery.^[36] This sodium amount strikes the perfect balance: enough to support optimal performance without potentially increasing blood pressure or causing water retention.

    

    Animal Test is back and better with a new formula featuring arachidonic acid and yohimbe, enhancing performance, recovery, and vitality.

    When combined with the potassium and magnesium in this formula, you’re getting a complete electrolyte profile designed to maintain optimal fluid balance and muscle function throughout your training session.

    Don’t worry about the fear-mongering over sodium! The more important part is to balance it with our next mineral, potassium:

  • Potassium – 120mg from Monopotassium Phosphate (3% DV)

    Animal Pump provides 120mg of potassium (3% DV) from monopotassium phosphate.

    Though modest in amount, potassium is critical for muscle function and hydration. This essential electrolyte works with sodium to maintain proper fluid balance and supports nerve signals for muscle contractions during intense training. Potassium also plays a vital role in blood pressure regulation and cardiovascular health, helping to offset some of sodium’s effects.^[37]

    While this pre-workout doesn’t deliver a massive dose, it contributes to your daily intake alongside a balanced diet to support optimal performance and recovery.

  There’s also 8mg of magnesium from magnesium oxide, representing a 2% DV of magnesium.

Flavors Available

Here’s a current list of all available flavors of Animal Pump:

Stacking Animal Pump

Animal Pump’s stim-free formula makes it incredibly versatile for stacking with other supplements in your regimen. Here are some of the most effective combinations:

Animal Primal just dropped 3 new flavors: Candy Crush, Dragon Berry, and Wick’d Peach! Designed for elite performance with 3DPUMP, taurine, tyrosine, and choline, these flavors bring a fresh twist to a solid pre-workout formula.

Animal Pump + Animal Primal

For those days when you need maximum performance, combining Animal Pump with Animal Primal creates the ultimate pre-workout stack. Animal Primal brings the energy and focus components with its ~310mg caffeine blend, while Animal Pump handles the blood flow, hydration, and endurance aspects. This combination delivers a comprehensive approach to pre-workout nutrition that covers all bases – pumps, energy, focus, endurance, and hydration.

If you’re going this route, consider using a full serving of Animal Pump with half to three-quarters of your normal Primal dose to assess tolerance. This powerful combo is perfect for those high-intensity training days or when hitting your PR attempts.

Animal Pump + Animal Creatine Chews

For enhanced recovery and power output, pair Animal Pump with Animal Creatine Chews. Take your Animal Pump 20-30 minutes before training, and enjoy the convenient Creatine Chews either pre-workout alongside your Pump or post-workout to kickstart recovery.

This combination helps maximize cellular volumization from multiple angles – the pump ingredients increase blood flow and the “transient” pump during your workout, while creatine drives long-term cellular hydration and ATP production that supports increased strength and power output.

Animal Pump + Animal Cuts (without the Red Pill)

For those in a cutting phase, stacking Animal Pump with Animal Cuts (and not taking the red stim pill) creates a powerful fat-burning and performance-enhancing duo. Take Animal Cuts in the morning to support your metabolic rate and fat mobilization throughout the day, then use Animal Pump before your training session to ensure you maintain performance and muscle fullness even while in a caloric deficit.

This stack is ideal for preserving workout intensity and muscle retention while leaning out, which are common challenges during cutting phases.

Conclusion: Animal Pump Delivers on All Fronts

Animal Pump Pre-Workout Stim-Free represents everything we’ve come to expect from Universal Nutrition’s Animal line — a comprehensive, no-compromise formula that provides exactly what it promises. What sets this product apart isn’t just the inclusion of pump ingredients like citrulline and Nitrosigine, but the complete approach to performance enhancement through clinically-dosed supporting ingredients and crucial electrolytes.

Creatine Gummies were recently discovered to fail NOW Foods’ testing – 46% failed testing! But Animal Creatine Chews are built different.. and better.

While many stim-free pre-workouts focus solely on nitric oxide production, Animal Pump goes beyond by addressing multiple aspects of performance – blood flow, endurance, focus, and hydration. This makes it both an excellent standalone pre-workout for stim-sensitive individuals and a perfect complement to caffeine-based pre-workouts for those who want the best of both worlds.

For anyone who trains in the evening, cycles off stimulants periodically, or simply prefers training without the sensation of caffeine, Animal Pump offers a solution that doesn’t compromise on results. And for the hardcore Animal fans who want to complete their supplement arsenal, this is the missing piece that pairs perfectly with other Animal staples like Animal Primal, Animal Creatine Chews, and Animal Pak.

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