Transparent Labs Bulk Pre-Workout Review 2024: My 5-Year Experience

by Nader Qudimat
Updated July 19, 2024
Serving Size
US and Ship World Wide
Full disclosed label with clinical dosages
Testosterone support included (zinc, vitamin b6+b12, and boron)
Caffeine is combined with theanine and theobromine for long lasting focus and energy
Unique nootropic and stimulant blend for long lasting energy
Citrulline to help muscle recovery and reduce soreness

Our Takeaway

Transparent Labs PreSeries Bulk is one of the most comprehensive pre-workouts available.

Each 20+ gram scoop boosts blood flow, enhances muscular performance, and provides smooth, sustained energy. Bulk supports testosterone production and cognitive function with natural, bioavailable ingredients, free from artificial colors or preservatives.


  • Smooth, sustained energy with no crash
  • Supports testosterone production
  • Enhances focus and cognitive function
  • No artificial colors or preservatives

Why Choose Transparent Labs Bulk Pre-Workout?

  • Clinically Dosed Ingredients: Every scoop is packed with scientifically-backed ingredients in effective doses.
  • High-Quality Standards: Made with natural ingredients, avoiding artificial additives.
  • Versatile for All Athletes: Suitable for both men and women, enhancing overall workout performance.

Try Transparent Labs PreSeries Bulk and feel the difference.

If you're looking to elevate your workouts, Transparent Labs PreSeries Bulk could be your go-to pre-workout supplement.

Transparent Labs is known for its commitment to transparency and high-quality formulations.

PreSeries Bulk is designed to enhance your performance and support muscle growth.

In this review, we'll break down the ingredients and benefits, helping you decide if it's the right fit for your fitness goals.

Why Choose Transparent Labs PreSeries Bulk?

  • Natural Ingredients: This pre-workout supplement contains no artificial colors, preservatives, or sweeteners, making it a cleaner choice.
  • Clinically Dosed: Each ingredient is included at full dosages backed by scientific research, ensuring effectiveness.
  • Testosterone Support: The formula includes minerals like zinc and boron, which support testosterone production.
  • Enhanced Focus: With nootropics such as Alpha GPC and L-Theanine, PreSeries Bulk enhances cognitive function and focus, helping you stay sharp during workouts.
PreSeries Bulk Pre-Workout by Transparent Labs

Containing over 20g per serving, Bulk contains complete doses of ergogenic aids and a range of nootropics and stimulants to help enhance energy.

  • Smooth energy and focus
  • No crash
  • Reliable and time-tested
Ingredients: 8g Citrulline Malate, 4g Beta-Alanine, 2.5g Betaine Anhydrous, 1.3g Taurine, 1g L-Tyrosine, 300mg AlphaSize, 180mg Sodium, 125mg Potassium, 50mg Senactiv, 10mg Zinc, 5mg Bioperine, 5mg Vitamin B6, 3mg Boron, 100mcg Vitamin B12
Stimulants: 200mg PurCaf, 200mg L-Theanine, 50mg Theobromine
FitFrek earns a commission if you click this link and make a purchase, at no additional cost to you.

User Experience and Testimonials

Real-world experiences and testimonials can provide valuable insights into the effectiveness of PreSeries Bulk.

Personal Review

As a dedicated user, I have tried various pre-workouts, and PreSeries Bulk stands out for its balanced energy and focus.

Unlike other supplements that cause jitters or crashes, Bulk provides a smooth, sustained boost that enhances both mental clarity and physical performance.

The natural ingredients and absence of artificial additives are a big plus for health-conscious users.

Customer Testimonials

  • John D.: "I've been using PreSeries Bulk for six months, and it has completely transformed my workouts. The energy is clean and long-lasting, and I’ve seen significant improvements in my strength and endurance."
  • Sarah K.: "I love that Bulk doesn’t contain any artificial ingredients. The focus and energy it provides are amazing, and I don’t experience the crash that I used to get with other pre-workouts."
  • Mike T.: "PreSeries Bulk has become my go-to pre-workout. It helps me power through intense sessions without feeling overstimulated. The natural flavors are also a nice touch."

Pros and Cons Based on User Feedback


  • Clean, sustained energy without jitters or crashes.
  • Natural ingredients with no artificial additives.
  • Improved focus and cognitive function.
  • Supports testosterone production and muscle recovery.


  • The tingling sensation from beta-alanine can be intense for some users.
  • Slightly higher price point, but justified by the quality and dosage of ingredients.

Detailed Ingredient Breakdown

Transparent Labs PreSeries Bulk is formulated with a range of ingredients designed to enhance your workout performance. Here's a closer look at each ingredient and its benefits:

Citrulline Malate (8g)

Citrulline Malate is a key ingredient known for its ability to enhance blood flow and muscle pumps.

  • Function: Enhances blood flow and muscle pumps by increasing nitric oxide production.
  • Benefits: Improves endurance, reduces fatigue, and boosts overall performance. Studies show it significantly enhances muscle pumps and endurance during high-intensity exercise.

Beta-Alanine (4g)

Beta-Alanine is included to help delay muscle fatigue and allow for more intense workouts.

  • Function: Buffers lactic acid to delay muscle fatigue.
  • Benefits: Allows for longer, more intense workout sessions. Research shows it improves performance in high-intensity activities like sprinting and weightlifting.

Betaine Anhydrous (2.5g)

This ingredient supports muscle strength and power, crucial for achieving workout goals.

  • Function: Supports muscle strength and power.
  • Benefits: Enhances muscle endurance and strength. Studies indicate it helps increase muscle power and improve body composition by increasing lean muscle mass.

Taurine (1.3g)

Taurine is essential for maintaining focus and hydration during workouts.

  • Function: Enhances focus and hydration.
  • Benefits: Improves mental focus during workouts and helps maintain hydration and electrolyte balance, reducing cramping.

L-Tyrosine (1g)

L-Tyrosine helps improve cognitive function and focus under stress, essential for intense training sessions.

  • Function: Improves cognitive function and focus under stress.
  • Benefits: Supports mental clarity and helps manage stress during intense workouts. Studies show it improves working memory and cognitive flexibility.

Alpha-GPC (300mg)

Alpha-GPC is included to boost cognitive function and power output.

  • Function: Boosts cognitive function and power output.
  • Benefits: Enhances mental sharpness and increases strength, particularly in the lower body. Research indicates it improves memory and learning by boosting acetylcholine levels.

Caffeine (200mg) and L-Theanine (200mg)

This combination provides sustained energy without the crash, improving overall workout performance.

  • Function: Provides sustained energy without the crash.
  • Benefits: Ensures a steady flow of energy and reduces jitteriness. The combination improves cognitive performance and focus while reducing anxiety.

Theobromine (50mg)

Theobromine offers a smoother and longer-lasting energy boost compared to caffeine.

  • Function: Provides sustained energy and mood enhancement.
  • Benefits: Offers a smoother and longer-lasting energy boost compared to caffeine, improving blood flow and reducing fatigue.

Sodium (180mg) and Potassium (125mg)

These crucial electrolytes help maintain hydration and muscle function.

  • Function: Crucial electrolytes for hydration and muscle function.
  • Benefits: Prevents muscle cramps and improves endurance by maintaining fluid balance and nerve function.

Senactiv (50mg)

Senactiv enhances energy production and recovery, making it easier to bounce back after intense workouts.

  • Function: Enhances energy production and recovery.
  • Benefits: Reduces muscle fatigue and improves recovery by supporting cellular regeneration.

Zinc (10mg)

Zinc is essential for testosterone production and immune function.

  • Function: Supports testosterone production and immune function.
  • Benefits: Essential for muscle growth and recovery, supporting healthy testosterone levels and protein synthesis.

Bioperine (5mg)

Bioperine enhances the absorption of nutrients, ensuring maximum benefit from each ingredient.

  • Function: Enhances nutrient absorption.
  • Benefits: Increases the bioavailability of ingredients, ensuring you get the most out of the supplement.

Vitamin B6 (5mg) and Vitamin B12 (100mcg)

These vitamins support energy metabolism and overall muscle performance.

  • Function: Supports energy metabolism.
  • Benefits: Improves energy levels, cognitive function, and muscle performance by aiding in red blood cell production and neurotransmitter synthesis.

Boron (3mg)

Boron supports bone health and testosterone levels, contributing to muscle growth and recovery.

  • Function: Supports bone health and testosterone levels.
  • Benefits: Enhances muscle growth and recovery by increasing free testosterone levels and maintaining bone density.

These ingredients collectively work to enhance your workout performance, improve endurance, and support muscle growth.

Dosage Instructions

Understanding the proper dosage and how to use Transparent Labs PreSeries Bulk is crucial for maximizing its benefits and minimizing potential side effects.

Recommended Dosage

  • Mix: One scoop (20g) with 12-16 ounces of water.
  • Timing: Consume 20-30 minutes before your workout.
  • Tolerance Assessment: Start with a lower dose to assess your tolerance, especially if you are sensitive to caffeine.

Tips for Best Results

To get the most out of PreSeries Bulk, follow these tips:

  • Stay Hydrated: Drink plenty of water throughout the day to stay hydrated and enhance the supplement's effects.
  • Do Not Exceed Recommended Dosage: Stick to the recommended dosage to avoid potential side effects.

Potential Side Effects

While Transparent Labs PreSeries Bulk is formulated with natural ingredients, some users may experience side effects, particularly if they are sensitive to certain compounds.

Possible Side Effects

  • Caffeine Sensitivity: May cause jitters, insomnia, or increased heart rate in sensitive individuals.
  • Beta-Alanine: Can cause a harmless tingling sensation known as paresthesia.
  • Allergic Reactions: Rare, but some users may be allergic to specific ingredients.


To ensure safe use of PreSeries Bulk:

  • Consult a Healthcare Professional: If you have any medical conditions or are taking medications, consult with a healthcare professional before using.
  • Avoid During Pregnancy or Nursing: Not recommended for pregnant or nursing women.
  • Age Restriction: Not recommended for individuals under 18.

Flavors Available

Transparent Labs PreSeries Bulk Pre-Workout comes in a variety of flavors, catering to a wide range of taste preferences.

The flavoring system has been recently improved based on user feedback, enhancing the overall experience.

Flavor Options

  • Strawberry Lemonade: A perfect blend of sweetness and tartness, making it very refreshing.
  • Sour Grape: A bold and tangy option, combining the rich, deep flavors of grapes with a zesty sour twist.
  • Pina Colada: A tropical delight that brings a bit of summer to your workout routine.
  • Orange: Crisp and citrusy, ideal for a morning boost.
  • Blue Raspberry: A classic favorite with a tangy and refreshing taste.
  • Strawberry Kiwi: A sweet and tangy combination that’s quite refreshing.
  • Green Apple: A sharp, crisp flavor for a revitalizing pre-workout drink.
  • Tropical Punch: A fruity blend that brings a taste of the tropics.
  • Watermelon Peach: A unique combination that provides a sweet and fruity flavor.
  • Cherry Splash: A bold and vibrant flavor for a refreshing boost.


No matter the flavor, the powder mixes effortlessly with water, ensuring a smooth drink without any gritty texture.

This makes it easy to prepare quickly, whether at home or on the go.

My Favorites

Out of all the options, my go-to flavors are Blue Raspberry and Strawberry Lemonade.

They not only taste great but also keep me looking forward to my pre-workout ritual.

For a more detailed review of each flavor, check out our dedicated article here.

It dives deeper into what you can expect from each flavor option.

How Does PreSeries Bulk Compare to Other Pre-Workouts?

When choosing a pre-workout supplement, it's essential to understand how different products stack up.

Here's a comparison of Transparent Labs PreSeries Bulk with some of the popular options like Pre Kaged and Pre Jym.

Unique Selling Points of PreSeries Bulk

  • Comprehensive Formula: PreSeries Bulk offers a more extensive range of ingredients at clinically effective dosages, ensuring you're getting everything you need in a single scoop.
  • Natural Ingredients: Unlike many competitors, PreSeries Bulk uses no artificial colors, preservatives, or sweeteners, making it a cleaner choice.
  • Testosterone Support: Includes minerals like zinc and boron to support testosterone levels, a feature not commonly found in other pre-workouts.

Cost-Effectiveness and Dosage Comparison

  • Price Per Serving: PreSeries Bulk is competitively priced. While it may appear more expensive initially, the full dosages of each ingredient mean you don't need to double scoop to get the desired effects, unlike some other products.
  • Dosage: Each serving of PreSeries Bulk is over 20 grams, far exceeding the serving sizes of many competitors. This ensures you get a comprehensive mix of ergogenic aids, nootropics, and stimulants.

Comparison with Pre Kaged and Pre Jym

  • Pre Kaged: While Pre Kaged offers a solid formula, it doesn't match the diversity of ingredients found in PreSeries Bulk. Pre Kaged focuses more on hydration and muscle pumps but lacks the comprehensive nootropic blend that Bulk offers.
  • Pre Jym: Pre Jym provides a good range of ingredients but often at lower dosages than PreSeries Bulk. Additionally, Pre Jym includes artificial sweeteners and flavors, which some users prefer to avoid.

By choosing Transparent Labs PreSeries Bulk, you are opting for a well-rounded pre-workout that prioritizes natural ingredients, comprehensive dosages, and additional testosterone support.

This makes it a standout choice for anyone serious about their fitness and health.


  • Bulk: Designed for balanced energy, endurance, and muscle growth.
  • Bulk Black: A stronger version with additional caffeine, B vitamins, and vitamin D for a more intense pre-workout boost.

Key Differences

  • Energy Levels: Bulk Black provides a more powerful energy boost due to the higher caffeine content.
  • Suitability: Bulk is ideal for those looking for a well-rounded pre-workout, while Bulk Black is better for those needing a more intense boost.

Bulk vs. Lean


  • Bulk: Focuses on muscle growth and endurance.
  • Lean: Targets fat loss while maintaining muscle mass.

Key Differences

  • Ingredients: Lean includes ingredients that promote fat burning, such as green tea extract and CLA.
  • Goals: Bulk is better for muscle building, while Lean is suited for those aiming to lose fat without sacrificing muscle.

Bulk vs. Pre-Jym


  • Bulk: Known for its natural ingredients and full dosages.
  • Pre-Jym: Popular for its blend of ingredients designed to enhance performance.

Key Differences

  • Ingredients: Pre-Jym includes creatine and BCAAs, which Bulk does not.
  • Formulation: Bulk avoids artificial additives, whereas Pre-Jym uses some artificial flavors and sweeteners.

BULK vs. Pump


  • BULK: Enhances overall performance with a focus on energy and muscle growth.
  • Pump: Specifically formulated to maximize muscle pumps and vascularity during workouts.

Key Differences

  • Focus: BULK offers a balanced approach, while Pump is tailored for those looking to enhance muscle pumps specifically.
  • Use Case: BULK is suitable for all-around performance, whereas Pump is ideal for hypertrophy-focused sessions.

Transparent Labs BULK vs. Stim-Free


  • BULK: Contains stimulants like caffeine for enhanced energy.
  • Stim-Free: A stimulant-free option for those sensitive to caffeine or looking to avoid it.

Key Differences

  • Energy Boost: BULK provides a significant energy boost, while Stim-Free relies on non-stimulant ingredients for performance enhancement.
  • Suitability: Stim-Free is perfect for evening workouts or those who are caffeine-sensitive.

Transparent Labs BULK vs. Pre-Kaged


  • BULK: Focuses on natural, clinically dosed ingredients.
  • Pre-Kaged: Known for its comprehensive formulation, including hydration and performance-enhancing ingredients.

Key Differences

  • Ingredients: Pre-Kaged includes creatine and coconut water powder for hydration.
  • Formulation: BULK emphasizes natural ingredients without artificial additives, while Pre-Kaged includes some artificial components.

Research-Backed Benefits

Transparent Labs PreSeries Bulk includes ingredients that are backed by scientific research, validating its effectiveness.

Citrulline Malate

  • Study: Gonzalez and Trexler (2020) found that citrulline malate enhances blood flow and muscle pumps, improving endurance and performance during high-intensity exercise.
  • Link: Citrulline Malate Study


  • Study: Hobson et al. (2012) showed that beta-alanine supplementation delays muscle fatigue and improves performance in high-intensity activities.
  • Link: Beta-Alanine Study

Betaine Anhydrous

  • Study: Hoffman et al. (2010) found that betaine anhydrous improves muscle strength, power, and endurance, enhancing overall performance.
  • Link: Betaine Anhydrous Study


  • Study: S Attipoe et al. (2015) for Mitigating Stress and Enhancing Performance in Healthy Adult Humans, a Rapid Evidence Assessment of the Literature
  • Link: L-Tyrosine Study


  • Study: Ziegenfuss et al. (2008) demonstrated that Alpha-GPC increases strength and power output, particularly in the lower body.
  • Link: Alpha-GPC Study

These studies validate the effectiveness of PreSeries Bulk's ingredients, making it a reliable choice for enhancing your workout performance.

PreSeries Bulk Pre-Workout by Transparent Labs

Containing over 20g per serving, Bulk contains complete doses of ergogenic aids and a range of nootropics and stimulants to help enhance energy.

  • Smooth energy and focus
  • No crash
  • Reliable and time-tested
Ingredients: 8g Citrulline Malate, 4g Beta-Alanine, 2.5g Betaine Anhydrous, 1.3g Taurine, 1g L-Tyrosine, 300mg AlphaSize, 180mg Sodium, 125mg Potassium, 50mg Senactiv, 10mg Zinc, 5mg Bioperine, 5mg Vitamin B6, 3mg Boron, 100mcg Vitamin B12
Stimulants: 200mg PurCaf, 200mg L-Theanine, 50mg Theobromine
FitFrek earns a commission if you click this link and make a purchase, at no additional cost to you.

Frequently Asked Questions (FAQs)

What is BULK?

BULK is a pre-workout supplement designed to enhance performance during workouts. It increases strength, endurance, and focus with a blend of scientifically-backed ingredients.

What ingredients are in BULK?

BULK contains Citrulline Malate, Beta-Alanine, Betaine Anhydrous, Taurine, L-Tyrosine, Alpha-GPC, Caffeine, L-Theanine, Theobromine, Sodium, Potassium, Senactiv, Zinc, Bioperine, Vitamin B6, Vitamin B12, and Boron.

How does BULK work?

BULK works by combining ingredients that enhance physical performance and mental focus. It improves blood flow, muscle endurance, and energy levels, making it easier to push through intense workouts.

How should I use BULK?

Mix one scoop with 12-16 ounces of water and consume 20-30 minutes before your workout. Start with a lower dose to assess tolerance, especially if you are sensitive to caffeine.

Is BULK safe?

BULK is generally safe for healthy adults when used as directed. Consult a healthcare professional if you have any medical conditions or are taking medication.

Can I use BULK if I'm sensitive to caffeine?

BULK contains caffeine, so if you're sensitive, start with a lower dose or choose a caffeine-free pre-workout option.

Can I use BULK if I'm pregnant or nursing?

Consult a healthcare professional before using BULK if you are pregnant or nursing.

Can I use BULK if I'm under 18?

BULK is intended for adults and should not be used by individuals under 18.

Where can I buy BULK?

You can purchase BULK directly from the Transparent Labs website or from various online retailers.

Does BULK contain any allergens?

BULK is free of gluten and GMOs. Always check the label for the most up-to-date ingredient and allergen information.

Why is there no creatine in BULK?

Transparent Labs suggests taking creatine post-workout as it is better absorbed after exercise. They offer a standalone creatine supplement.

What is the difference between Bulk and Bulk Black?

Bulk Black is a "harder-hitting" version with additional caffeine, B vitamins, and vitamin D for a stronger pre-workout boost.

What flavors does Bulk Pre-Workout come in?

BULK comes in Blue Raspberry, Tropical Punch, Orange, Strawberry Lemonade, Lemon Lime, Sour Grape, Green Apple, and Watermelon. Bulk Black comes in black cherry.

Is Transparent Labs Bulk Vegan-Friendly or Vegetarian-Friendly?

Yes, BULK is confirmed as vegan-friendly on the product's page.


Transparent Labs PreSeries Bulk stands out as one of the most comprehensive and effective pre-workout supplements available today.

With its well-rounded formula of clinically dosed ingredients, it provides smooth, sustained energy, enhances mental focus, and supports muscle growth and recovery.

The absence of artificial additives and the inclusion of natural, bioavailable ingredients make it a clean choice for those looking to improve their workouts.

Whether you're aiming to break through plateaus, improve endurance, or simply get more out of your workouts, PreSeries Bulk has something to offer.

Its versatility and effectiveness have made it a favorite among many athletes


by Nader Qudimat

Forged by iron and cold steel, I'm Nader, a mid-30s natural bodybuilder. Once a 100lb skinny guy, I've transformed into a 200lb muscular athlete with over 15 years of lifting experience. Today, I leverage my transformation and extensive experience to guide countless individuals on their fitness journeys.

Click here to check out my 12 year transformation: Natural 12 Year Transformation

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