TRANSPARENT LABS
Comparison · Dated labels
Transparent Labs Bulk Black Pre-Workout vs Transparent Labs Lean Pre-Workout
THE SHORT ANSWER
It depends on what you want from the label.
- Less caffeineTransparent Labs Lean
- Lower cost per servingTransparent Labs Lean
- More actives at researched dosesTransparent Labs Bulk Black
The full answer, in words
Less caffeine: Transparent Labs Lean. Lower cost per serving: Transparent Labs Lean. More actives at researched doses: Transparent Labs Bulk Black. Transparent Labs Bulk Black Pre-Workout declares 325 mg of caffeine per serving and Transparent Labs Lean Pre-Workout declares 180 mg, on labels both observed August 3, 2026. At the prices FormulaSignal observed, Transparent Labs Bulk Black Pre-Workout costs $1.83 a serving and Transparent Labs Lean Pre-Workout $1.67. They share 4 declared active ingredients; Transparent Labs Bulk Black Pre-Workout lists 8 the other does not, and Transparent Labs Lean Pre-Workout lists 10.
Every figure here is read from the FormulaSignal Record, from each brand's own product page, with the date it was observed. No winner is declared and no product is scored.
At a glance
Two labels, five facts.
TRANSPARENT LABSTransparent Labs Bulk Black Pre-Workout
TRANSPARENT LABSTransparent Labs Lean Pre-Workout- Caffeine per serving
- Transparent Labs Bulk Black Pre-Workout: 325 mg
- Transparent Labs Lean Pre-Workout: 180 mg
- Price per servingLower costs less
- Transparent Labs Bulk Black Pre-Workout: $1.83
- Transparent Labs Lean Pre-Workout: $1.67
- Main actives at researched doses
- Transparent Labs Bulk Black Pre-Workout: 3 of 3
- Transparent Labs Lean Pre-Workout: 2 of 4
- Servings per container
- Transparent Labs Bulk Black Pre-Workout: 30
- Transparent Labs Lean Pre-Workout: 30
- Confirmed formula changes
- Transparent Labs Bulk Black Pre-Workout: 0
- Transparent Labs Lean Pre-Workout: 0
Which fits you
Choose by what you care about.
Each line is a measured difference between the two labels, not a verdict. Nothing here says either product works, or is safe for you.
You want less caffeine per serving: Transparent Labs Lean Pre-Workout
180 mg against 325 mg declared per serving. Less is not safer and more is not better; how much suits you is a question for a clinician.
Cost per serving matters most: Transparent Labs Lean Pre-Workout
$1.67 against $1.83 a serving at the prices FormulaSignal observed (Oct 20, 2026 and Aug 3, 2026). Not every price here is established as a list price.
You want more of the main actives at researched doses: Transparent Labs Bulk Black Pre-Workout
3 of 3 main actives on Transparent Labs Bulk Black Pre-Workout sit inside the dose range the cited research used, against 2 of 4 on Transparent Labs Lean Pre-Workout. A comparison of numbers, not of how well either works.
Side by side
Transparent Labs Bulk Black and Transparent Labs Lean, line by line.
The same fields the FormulaSignal API and MCP server return for this pair.
| Field | Transparent Labs Bulk Black | Transparent Labs Lean |
|---|---|---|
| Caffeine per serving The Record's total across every declared caffeine source. Neither direction is better. | 325 mg | 180 mg |
| Price per serving Observed package price divided by the stated serving count. The basis of each price is on the product's Record. | $1.83 | $1.67 |
| Monthly cost at five uses a week | $39.65 | $36.18 |
| Servings per container | 30 | 30 |
| Ingredients with a disclosed amount A proprietary blend total counts as one amount, and the split inside it stays undisclosed. | 16 of 16 | 15 of 15 |
| Main actives inside researched doses Declared amounts measured against the range the cited research used. Not a measure of effectiveness. | 3 of 3 | 2 of 4 |
| Documented cautions | Stimulant-load gate, Alpha-GPC 50% material | None on file |
| Regulatory records A filing exists. It is not a finding about safety. | None on file | None on file |
| Confirmed formula changes Zero means none confirmed, not that the formula never changed. | 0 | 0 |
| Label observed | August 3, 2026 | August 3, 2026 |
Ingredient by ingredient
What both declare, and what only one does.
Matched by FormulaSignal's normalized identity, so two brand names for the same compound line up and two forms of one ingredient do not. Vitamins, minerals and electrolytes are left out; caffeine is compared as a total above.
| Declared by both | Transparent Labs Bulk Black | Transparent Labs Lean |
|---|---|---|
| Citrulline malate | 8000 mg | 6000 mg |
| Beta-alanine | 4000 mg | 2000 mg |
| L-theanine | 200 mg | 180 mg |
| Huperzine A (Huperzia serrata) (leaf) | 200 mcg | 100 mcg |
Only on Transparent Labs Bulk Black Pre-Workout
- Zinc (as Zinc Chelate): 10 mg
- Potassium (as Potassium Citrate): 130 mg
- Betaine Anhydrous (BetaPure): 2500 mg
- L-tyrosine: 2000 mg
- Alpha-GPC 50% material: 300 mg
- Senactiv Tienchi Ginseng (Panax notoginseng) (Root) Extract & Chestnut Rose (Rosa roxburghii) (Fruit) Extract: 50 mg
- Bioperine (Black Pepper Extract) (Piper nigrum) (fruit): 5 mg
- Boron (from Boron Citrate): 3 mg
Only on Transparent Labs Lean Pre-Workout
- Iodine (as Potassium Iodide): 225 mcg
- Zinc (as Zinc Citrate): 15 mg
- Selenium (as L-Selenomethionine): 55 mcg
- Copper (as Copper Carbonate): 1 mg
- Chromium (as Chromax (Chromium Picolinate)): 200 mcg
- Betaine anhydrous: 1500 mg
- Acetyl L-Carnitine HCl: 1000 mg
- Choline bitartrate: 500 mg
- Theobromine: 50 mg
- Bioperine (Piper Nigrum) (Black Pepper (Fruit) Extract): 5 mg
Method
How this page was made.
What FormulaSignal did
- Read Transparent Labs Bulk Black Pre-Workout's label as Transparent Labs published it, observed August 3, 2026.
- Read Transparent Labs Lean Pre-Workout's label as Transparent Labs published it, observed August 3, 2026.
- Matched 22 declared active ingredients by normalized identity, so two brand names for one compound line up.
- Checked each main active's declared dose against the range the cited research used: 3 of 3 on Transparent Labs Bulk Black Pre-Workout; 2 of 4 on Transparent Labs Lean Pre-Workout.
- Looked for confirmed formula changes on either product: 0 on file, each reviewed against two dated sources.
What it did not do
- No taste test and no lab test. Every figure is what a label or a brand's own page declares, not what was measured in a tub.
- No score and no winner. Differences are measured and shown; nothing is rated.
- No payment and no preview. No brand paid to appear, and none saw this page before it was published.
- No health advice. Whether an ingredient or an amount suits you is a question for a clinician.
Evidence
Open the sources behind every figure.
Each product's Record lists every capture, with both its observation and access dates.
Transparent Labs Bulk Black Pre-Workout: label
Transparent Labs · P1 · observed August 3, 2026
Open the sourceTransparent Labs Bulk Black Pre-Workout: price
Transparent Labs · the price shown · observed August 3, 2026
Open the sourceTransparent Labs Lean Pre-Workout: label
Transparent Labs · P1 · observed August 3, 2026
Open the sourceTransparent Labs Lean Pre-Workout: price
Transparent Labs · the price shown · observed October 20, 2026
Open the source
Where to buy
Decided? Check the label on what you buy.
TRANSPARENT LABS
Transparent Labs Lean Pre-Workout
As an Amazon Associate FormulaSignal earns from qualifying purchases. The link goes to the Amazon listing for this product. It is not a recommendation, and it cannot change anything the Record says or how anything is ordered. Choose the flavor and size on the seller’s page; this link does not establish the price or package shown in the Record. A listing can show an older label, so compare its label photo before you buy.
Questions
Transparent Labs Bulk Black vs Transparent Labs Lean: common questions
Which is better, Transparent Labs Bulk Black or Transparent Labs Lean?
It depends on what you want from the label. Less caffeine: Transparent Labs Lean. Lower cost per serving: Transparent Labs Lean. More actives at researched doses: Transparent Labs Bulk Black. FormulaSignal names no winner: each line is a measured difference between the two dated labels, and what suits you is yours to weigh, with a clinician for anything about your health.
Which has more caffeine, Transparent Labs Bulk Black or Transparent Labs Lean?
Transparent Labs Bulk Black Pre-Workout declares 325 mg per serving and Transparent Labs Lean Pre-Workout 180 mg, on the labels observed August 3, 2026 and August 3, 2026. More caffeine is not better; what suits you is a question for a clinician.
Is Transparent Labs Bulk Black stronger than Transparent Labs Lean?
If “stronger” means caffeine, Transparent Labs Bulk Black Pre-Workout declares more (325 mg against 180 mg). FormulaSignal does not rate how strong a product feels; that is an experience question the labels cannot answer.
Which is cheaper per serving?
Transparent Labs Lean Pre-Workout, at $1.67 a serving at the price shown on Oct 20, 2026, against Transparent Labs Bulk Black Pre-Workout at $1.83 a serving at the price shown on Aug 3, 2026.
Do Transparent Labs Bulk Black and Transparent Labs Lean contain creatine?
Transparent Labs Bulk Black Pre-Workout: none declared on its complete label. Transparent Labs Lean Pre-Workout: none declared on its complete label.
Do they contain beta-alanine?
Transparent Labs Bulk Black Pre-Workout: Beta Alanine (4000 mg). Transparent Labs Lean Pre-Workout: Beta-Alanine (2000 mg).
Has either formula changed?
FormulaSignal holds no confirmed change for either product. That is a statement about the Record, not a finding that neither formula ever changed.
Keep comparing
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- Transparent Labs BULK vs Transparent Labs Lean Pre-Workout
- Legion Athletics Pulse vs Transparent Labs Lean Pre-Workout
- Transparent Labs Lean Pre-Workout vs Transparent Labs Stim-Free Pre-Workout
Lists that include both
- The cheapest pre-workouts per servingTransparent Labs Bulk Black #123, Transparent Labs Lean #113
- Pre-workouts without a proprietary blendTransparent Labs Bulk Black #14, Transparent Labs Lean #87
- Clinically dosed pre-workouts, checked against the researchTransparent Labs Bulk Black #14, Transparent Labs Lean #92
- Pre-workouts without creatineTransparent Labs Bulk Black #11, Transparent Labs Lean #58
Every comparison · Pre-workout lists · What the Record covers
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