Name: Transparent Labs Bulk Black
Brand: Transparent Labs
SKU: transparent-labs-bulk-black

30-Second Review

Bulk Black by Transparent Labs is a high-stim pre-workout. Bulk with the stim turned up. One scoop is 325mg of caffeine from PurCaf plus Infinergy, plus 8g of citrulline malate, 4g of beta-alanine, 2.5g of betaine, and 300mg of alpha-GPC.

You keep Bulk's 8g of citrulline malate, 4g of beta-alanine, 2.5g of betaine, and 300mg of alpha-GPC. The caffeine is 325mg of PurCaf plus Infinergy on the current panel. The tub is $54.99 for 30 servings, about $1.83 each. The limit is that 325mg of caffeine is more than most people need if regular Bulk already works.

Disclaimer: This is an independent editorial analysis. No brand paid for this score.

Bulk Black

Transparent Labs9.4

High-Stim305mg caffeine

8.4

Rating Breakdown

Price & Value7.2

Ingredients & Blend9.0

Brand Reputation9.4

Review Scan8.0

Final Overall Score8.4

$1.83 / serving · 30 servings / container

Bulk Black

Transparent Labs9.4

High-Stim305mg caffeine

Price & Value7.2

Ingredients & Blend9.0

Brand Reputation9.4

Review Scan8.0

8.4

$1.83 / serving · 30 servings / container

Pros

You keep Bulk's 8g of citrulline malate, 4g of beta-alanine, 2.5g of betaine, and 300mg of alpha-GPC
The caffeine is 325mg of PurCaf plus Infinergy on the current panel

Cons

325mg of caffeine is more than most people need if regular Bulk already works
8g of citrulline malate is closer to 5.3g of actual citrulline, so the pump blend is smaller than the tub number

Label Snapshot

Caffeine325mg

Beta-Alanine4g

L-CitrullineNone

L-TheanineNone

CreatineNone

Flavors

Peach Mango, Black Cherry, Sour Gummy, Grape Limeade, Strawberry Mango, Watermelon Peach, Cherry Kiwi, Blueberry Pomegranate, Blue Raspberry

Where to buy

2 stores we checked on Oct 26, 2026, best price per serving first. Prices change often, so the price at checkout is the one that counts.

Best price per serving

Transparent Labs949 reviews at Transparent Labs

Available flavors

Peach Mango, Black Cherry, Sour Gummy, Grape Limeade, Strawberry Mango, Watermelon Peach, Cherry Kiwi, Blueberry Pomegranate, Blue Raspberry

transparentlabs.comOfficial Brand Store

Buy for $54.99$1.83 / serving

Amazon

Available flavors

Cherry Kiwi, Sour Gummy, Strawberry Mango, Black Cherry

amazon.com

Buy for $54.99$1.83 / serving

We may earn a commission when you buy through these links, at no extra cost to you. It never changes a score. How we make money

Tub price history

Lowest price we have written down

About the brand

The company behind Bulk Black

Brand name: Transparent Labs
Parent company: Nutra Holdings
Founded: 2016
Key people: John Williams
Headquarters: American Fork, Utah

Transparent Labs Bulk Black video reviews

From other creators on YouTube. We don't make these videos or pay for them.

9:32
Transparent Labs BULK BLACK Review: 30-Day ResultsFeastGood · Aug 7, 2024
15:29
BULK BLACK JUST GOT STRONGER! 👑 Transparent Labs Bulk Black Pre-Workout ReviewGarage Gym Homie · Jul 26, 2024

Transparent Labs Bulk Black Stats

How its label, price and reviews stack up against the 158 pre-workout tubs we rank.

Rankings

Top 7%

#12of 199

All pre-workouts

Top 8%

#3of 42

High-Stim Pre-Workouts

#4of 6

Transparent Labs products

High-Stim Pre-Workouts

All 42 Products

Supplekings Score

Great8.4

Higher than 94% of tubsAverage 7.6

Price & Value0.37.2
Ingredients & Blend1.59.0
Brand Reputation1.49.4
Review Scan0.28.0

Shopper Rating

4.7/5

949 reviews at Transparent Labs

Sold At

At a Glance

Type: High-stim pre-workout
Caffeine: 305mg
Stim level: High
Servings per tub: 30
Flavors: 9
Prices checked: Oct 26, 2026

Label Doses

Next to other pre-workout tubs. This one is the bright bar.

CaffeineMore than 66% of tubs

325mg

124mgTypical 300mg420mg+

Citrulline MalateTied for the most

1gTypical 6g8g

Beta-AlanineMore than 86% of tubs

1.6gTypical 3.2g6.4g+

Alpha-GPCTied for the most

300mg

100mgTypical 250mg300mg

Price Stats

Cheapest on the left. This one is the bright bar.

Per servingCheaper than 33% of tubs

$1.83

$0.67Typical $1.50$3.00+

Per 100mg of caffeineCheaper than 44% of tubs

$0.60

$0.27Typical $0.56$1.33+

Lowest price for 30 servings: $54.99 at 2 stores
Change since Oct 22, 2026: No change

Transparent Labs Bulk Black FAQ

How much caffeine is in Transparent Labs Bulk Black?

Each serving of Transparent Labs Bulk Black has 305mg of caffeine, more than 63% of the 122 pre-workout tubs we rank that list an amount. That makes it a high-stim pre-workout (250-349mg), where it ranks #3 of 42.

What's on the Transparent Labs Bulk Black label?

The doses we track are 8g of citrulline malate (tied for the most of the 25 that list it), 4g of beta-alanine (more than 86% of the 107 that list it), and 300mg of alpha-GPC (tied for the most of the 6 that list it).

How much does Transparent Labs Bulk Black cost per serving?

The lowest price we found is $54.99 for 30 servings, or $1.83 per serving. That's cheaper than 33% of the 158 pre-workout tubs we rank, where the typical one costs $1.50.

Where can you buy Transparent Labs Bulk Black?

We checked 2 stores on Oct 26, 2026: Transparent Labs and Amazon. It comes in 9 flavors.

How do shoppers rate Transparent Labs Bulk Black?

Shoppers give Transparent Labs Bulk Black an average of 4.7 out of 5 across 949 reviews at Transparent Labs. Our Review Scan score for it is 8.0 out of 10.

Who makes Transparent Labs Bulk Black?

Transparent Labs makes Bulk Black. Its parent company is Nutra Holdings. The brand was founded in 2016 and is based in American Fork, Utah. We rank 6 Transparent Labs products, averaging 8.4 out of 10.

How does Transparent Labs Bulk Black score?

We score it 8.4 out of 10, #12 of 199 pre-workouts. Its strongest rating is Brand Reputation 9.4 and its weakest is Price & Value 7.2.