Transparent Labs Pre-Workout: Compare & Choose the Best

Transparent Labs offers a powerful lineup of science-backed pre-workout formulas  designed for gym-goers, athletes, and bodybuilders who want to level up their performance and results.

New to TL supplements?

Not sure which pre-workout is right for you—BULK, LEAN, or PUMP?

This guide has you covered. We’ll walk you through the key differences between each formula and highlight their unique benefits, so you can choose the best option based on your training goals.

BULK Pre-Workout

BULK is the "OG" Transparent Labs pre-workout powder designed with strength athletes and dedicated gym-goers in mind. Each serving (1 scoop) of this pre-workout formula comes fully loaded with evidence-based ingredients in clinical doses, including:

BULK set the trend for clinically dosed pre-workout supplements with a whopping 17+ grams of active ingredients in each serving (nearly four times more than most pre-workouts contain). Like all Transparent Labs supplements, BULK is free from proprietary blends and lists the specific amounts of each active ingredient. 

BULK PRE-WORKOUT FORMULA HIGHLIGHTS:

• The original powerhouse Transparent Labs pre-workout powder for athletes, bodybuilders, and gym-goers looking to build lean muscle mass. 
• Over 17 grams of active ingredients in each scoop.
• Formulated with a comprehensive profile of nitric-oxide boosters and muscle-volumizing ingredients to enhance blood flow, strength, and stamina. 
• Ample doses of PurCaf® natural caffeine and AlphaSize® alpha-GPC for lasting mental acuity and clean energy—no crashing or jitters.
• Natural flavoring, no artificial coloring, and sweetened with stevia. 
• No added sugars.
• Comes in multiple refreshing fruit flavors that you'll actually look forward to drinking.

BULK BLACK Advanced Pre-Workout Formula

BULK BLACK is a "hardcore" iteration of the original BULK Pre-Workout formula, providing a high-performance edge that takes mental and physical performance up a notch. This advanced pre-workout is ideal for those with a higher caffeine tolerance. Each serving contains:

If you're looking for a harder-hitting pre-workout that doesn't break the bank, BULK BLACK contains effective doses of cutting-edge ingredients that go to work starting from the very first dose. 

BULK BLACK FORMULA HIGHLIGHTS:

• Advanced nootropic ingredients for enhanced mental clarity, improved mood, and limitless energy 
• Robust blend of NO-boosters for intense muscle pumps
• Fatigue-fighting nutrients that bolster strength and power throughout your workout.
• Natural flavoring, no artificial coloring, and sweetened with stevia. 
• No added sugars.
• Choose from unique flavors like sour gummy worms and black cherry.

LEAN: Thermogenic Pre-Workout Formula

Transparent Labs LEAN Pre-Workout is a favorite among athletes and gym-goers looking to cut body fat and excel in the trenches. This formula features clinical doses of evidence-based thermogenic ingredients and other nutrients that promote blood flow, strength, endurance, and focus.

LEAN Pre-Workout kills two birds with one stone by augmenting athletic performance and facilitating fat loss when pumping iron and doing cardio. 

Every scoop/serving of LEAN Pre-Workout contains:

A critical distinction of this formula from BULK is the inclusion of ALCAR, a bioavailable form of L-carnitine that helps shuttle triglycerides (fat) into mitochondria so they can be burned for energy. ALCAR is also a potent neuroprotective agent that provides synergy with caffeine, L-theanine, and theobromine.

LEAN PRE-WORKOUT FORMULA HIGHLIGHTS:

• Advanced thermogenic pre-workout that ignites fat-burning pathways while increasing athletic performance 
• Increase blood flow, endurance, strength, and energy
• Improve focus, mood, and concentration 
• Ideal for active individuals who are trying to cut body fat and preserve as much muscle as possible
• Natural flavoring, no artificial coloring, and sweetened with stevia. 
• No added sugars.
• Comes in multiple taste-bud-friendly flavors

STIM-FREE Pre-Workout

Transparent Labs STIM-FREE Pre-Workout is ideal for athletes and fitness enthusiasts who are sensitive to stimulants, train at night/close to bedtime, or need a caffeine break to reset their tolerance. If you fall in these categories, check out Transparent Labs Stim-Free Pre-Workout, an all-natural formula providing clinically effective doses of non-stim pre-workout ingredients that amplify blood flow, focus, strength, and endurance, including:

Another benefit is that you won't develop a tolerance to Stim-Free Pre-Workout, meaning efficacy will remain similar over time, and it won’t cause caffeine-associated side effects like crashing, anxiety, and jitters.

PUMP Pre-Workout Formula (Non-Stimulant)

Transparent Labs PUMP pre-workout is so-named because it contains no stimulants and is designed to maximize blood flow to muscle tissue during training. Since central nervous system stimulants like caffeine are vasoconstrictive (meaning they hinder blood flow), a major benefit of this stim-free pre-workout formula is that it allows users to get an intense pump in the gym.

This formula comes loaded with muscle-volumizing ingredients and nitric oxide boosters to fully maximize the proverbial "pump" while you're cranking out reps in the gym.

PUMP also features a range of non-stimulant nootopics to help you focus and improve mental clarity without making you jittery or interfering with sleep (great for those who train late in the evening/shortly before bedtime). 

Each scoop/serving of PUMP provides:

Since PUMP is stimulant-free, it's the perfect pre-workout powder for active individuals sensitive to ingredients like caffeine and theobromine.

PUMP FORMULA HIGHLIGHTS:

• Designed to maximize muscle pumps and strength with clinical doses of L-citrulline and NO3-T®.
• Packed with stim-free nootropics to enhance focus and mental clarity..
• Ideal for those who train shortly before bedtime and individuals sensitive to stimulants like caffeine.
• Can be stacked with other TL stim-based pre-workouts for even greater energy, focus, and stamina.
• Available in two refreshing fruit flavors.
• Zero sugar, fillers, or artificial food dyes.

Experience the Difference with Transparent Labs Pre-Workout Supplements

It's daunting to choose the best pre-workout powder is when there are countless options on the market, but you can rest easy knowing that every Transparent Labs formula provides high-quality ingredients backed by science and clinical research. In addition, all TL supplements are manufactured under stringent quality-control protocols at a CGMP facility in the United States. 

There's a reason top athletes and physique competitors trust formulas like BULK and LEAN to deliver before every training session: Because Transparent Labs pre-workout powders get the job done—every time.