Transparent Labs Pre Workout Review (2026): Expert Tested and Approved

Our team put Transparent Labs’ strongest pre-workout, BULK Black Pre-Workout, to the test. We considered mixability, taste, flavor, and how well it performed during workouts. Read on for our full review.

Transparent Labs Pre Workout

Fortune score

4.5/5

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at Transparent Labs

Key product features

• Our thoughts: A well-formulated, clinically dosed pre-workout
• Who it’s for: Athletes and enthusiastic gym goers who want an extra strength supplement
• What makes it different: It’s Informed Choice certified and free of banned substances

Pros and Cons

Pros

• Available in eight flavors
• No artificial colors, sweeteners, or preservatives
• Informed Choice certified

Cons

• Subscribe and save discount is only 10% off
• No stim-free version
• High caffeine levels may be too much for some folks

Transparent Labs BULK Black Pre-Workout Specs

Our Experience with Transparent Labs Pre-Workout

Transparent Labs BULK Black Pre-Workout has high caffeine content and contains solid dosages of both citrulline malate and beta-alanine, which have scientifically backed performance benefits. It also includes l-theanine, which may help to prevent any feelings of jitters or anxiety that can come with highly caffeinated pre-workout products. It’s available in eight flavors, including blue raspberry, black cherry, peach mango, and more.

Pete tested Transparent Labs BULK Black Pre-Workout, providing ratings and feedback on his first impressions, mixability, taste, value, and more.

What We Liked 

Here’s what our tester rated highly after trying Transparent Labs BULK Black Pre-Workout.

• First impressions (5 out of 5): Pete liked that this supplement comes in a fairly small sized tub, which would make it easy to travel with. A scoop is provided.
• Ease of reading and understanding instructions (5 out of 5): “The instructions are clear, and the brand provides two options based on your experience with pre-workout powders, specifically the caffeine content in these higher dosed formulas,” Pete said. We like that you can start with one half scoop to assess your tolerance and go up from there.
• Mixability (5 out of 5): After shaking for one minute, the pre-workout fully dissolved with no chunks and a smooth consistency.
• Flavor and taste (5 out of 5): Pete tried the blue raspberry flavor and likened it to a blue raspberry snow cone. “The brand doesn’t use any artificial flavors, colors, or sweeteners. They use blue spirulina for the color, which is cool, and stevia to sweeten the product,” he said.
• Formulation (5 out of 5): “This is a well-formulated, clinically dosed pre-workout. There’s a decent amount of caffeine, and the l-theanine helps to prevent any feelings of jitters or anxiety that can come with highly caffeinated pre-workout products,” Pete said. He added: “The product also has 4,000 mg of beta-alanine which is a solid dose and enough to feel the tingling sensation known as paresthesia. I’m used to taking pre-workout so the tingles don’t hit me too hard, but consumers new to pre-workout may feel this a lot more. My workout on this pre-workout was great, I felt the muscle pumps from the 8,000 mg of citrulline malate and I felt energized throughout the whole session, 10 minute warmup, 15 minutes of strength work (squats), and then a 15 minute workout of sled push, handstand walks, and rowing.” 

What We Would Change

Here’s what Pete would improve about Transparent Labs BULK Black Pre-Workout.

• Price (1 out of 5): Each serving costs $1.83 as of this writing. It’s not the most expensive pre-workout that our team has tested, but it’d be nice if the subscribe and save option was for more than 10% off.

Who It’s For & Who It’s Not For

Transparent Labs BULK Black Pre-Workout may work well for some and not for others. Here’s a breakdown of when we think it will work well and when we think you might want to shop around more.

Comparing Transparent Labs to Other Pre-Workouts

Frequently asked questions