TRANSPARENT LABS
Comparison · Dated labels
Transparent Labs Lean Pre-Workout vs Transparent Labs Stim-Free Pre-Workout
THE SHORT ANSWER
It depends on what you want from the label.
- No stimulantsTransparent Labs Stim-Free
- More actives at researched dosesTransparent Labs Stim-Free
The full answer, in words
No stimulants: Transparent Labs Stim-Free. More actives at researched doses: Transparent Labs Stim-Free. Transparent Labs Lean Pre-Workout declares 180 mg of caffeine per serving and Transparent Labs Stim-Free Pre-Workout declares no caffeine or other stimulant on its complete label, on labels both observed August 3, 2026. At the prices FormulaSignal observed, Transparent Labs Lean Pre-Workout costs $1.67 a serving and Transparent Labs Stim-Free Pre-Workout $1.67. They share 4 declared active ingredients; Transparent Labs Lean Pre-Workout lists 10 the other does not, and Transparent Labs Stim-Free Pre-Workout lists 5.
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 Lean Pre-Workout
TRANSPARENT LABSTransparent Labs Stim-Free Pre-Workout- Caffeine per serving
- Transparent Labs Lean Pre-Workout: 180 mg
- Transparent Labs Stim-Free Pre-Workout: None declared
- Price per servingLower costs less
- Transparent Labs Lean Pre-Workout: $1.67
- Transparent Labs Stim-Free Pre-Workout: $1.67
- Main actives at researched doses
- Transparent Labs Lean Pre-Workout: 2 of 4
- Transparent Labs Stim-Free Pre-Workout: 3 of 3
- Servings per container
- Transparent Labs Lean Pre-Workout: 30
- Transparent Labs Stim-Free Pre-Workout: 30
- Confirmed formula changes
- Transparent Labs Lean Pre-Workout: 0
- Transparent Labs Stim-Free 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 a pre-workout without stimulants: Transparent Labs Stim-Free Pre-Workout
Its complete label declares no caffeine or other stimulant; Transparent Labs Lean Pre-Workout declares 180 mg of caffeine per serving.
You want more of the main actives at researched doses: Transparent Labs Stim-Free Pre-Workout
3 of 3 main actives on Transparent Labs Stim-Free 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 Lean and Transparent Labs Stim-Free, line by line.
The same fields the FormulaSignal API and MCP server return for this pair.
| Field | Transparent Labs Lean | Transparent Labs Stim-Free |
|---|---|---|
| Caffeine per serving The Record's total across every declared caffeine source. Neither direction is better. | 180 mg | None declared |
| Price per serving Observed package price divided by the stated serving count. The basis of each price is on the product's Record. | $1.67 | $1.67 |
| Monthly cost at five uses a week | $36.18 | $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. | 15 of 15 | 11 of 11 |
| Main actives inside researched doses Declared amounts measured against the range the cited research used. Not a measure of effectiveness. | 2 of 4 | 3 of 3 |
| Documented cautions | None on file | 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 Lean | Transparent Labs Stim-Free |
|---|---|---|
| Citrulline malate | 6000 mg | 8000 mg |
| Beta-alanine | 2000 mg | 4000 mg |
| Betaine anhydrous | 1500 mg | 2500 mg |
| Huperzine A (Huperzia serrata) (leaf) | 100 mcg | 100 mcg |
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
- Acetyl L-Carnitine HCl: 1000 mg
- Choline bitartrate: 500 mg
- L-theanine: 180 mg
- Theobromine: 50 mg
- Bioperine (Piper Nigrum) (Black Pepper (Fruit) Extract): 5 mg
Only on Transparent Labs Stim-Free Pre-Workout
- Taurine: 1300 mg
- L-tyrosine: 1000 mg
- elevATP (Ancient Peat; Apple Extract) (Malus spp.) (fruit): 150 mg
- Senactiv Tienchi Ginseng (Panax notoginseng) (Root) Extract & Chestnut Rose (Rosa roxburghii) (Fruit) Extract: 50 mg
- Bioperine Black Pepper (Piper nigrum) (Fruit) Extract (95% Piperine): 5 mg
Method
How this page was made.
What FormulaSignal did
- Read Transparent Labs Lean Pre-Workout's label as Transparent Labs published it, observed August 3, 2026.
- Read Transparent Labs Stim-Free Pre-Workout's label as Transparent Labs published it, observed August 3, 2026.
- Matched 19 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: 2 of 4 on Transparent Labs Lean Pre-Workout; 3 of 3 on Transparent Labs Stim-Free 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 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 sourceTransparent Labs Stim-Free Pre-Workout: label
Transparent Labs · P1 · observed August 3, 2026
Open the sourceTransparent Labs Stim-Free 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 Stim-Free 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 Lean vs Transparent Labs Stim-Free: common questions
Which is better, Transparent Labs Lean or Transparent Labs Stim-Free?
It depends on what you want from the label. No stimulants: Transparent Labs Stim-Free. More actives at researched doses: Transparent Labs Stim-Free. 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 is cheaper per serving?
They cost the same per serving at the prices FormulaSignal observed: $1.67.
Do Transparent Labs Lean and Transparent Labs Stim-Free contain creatine?
Transparent Labs Lean Pre-Workout: none declared on its complete label. Transparent Labs Stim-Free Pre-Workout: none declared on its complete label.
Do they contain beta-alanine?
Transparent Labs Lean Pre-Workout: Beta-Alanine (2000 mg). Transparent Labs Stim-Free Pre-Workout: Beta-Alanine (4000 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
Other comparisons with these two.
- Transparent Labs BULK vs Transparent Labs Lean Pre-Workout
- Transparent Labs Bulk Black Pre-Workout vs Transparent Labs Lean Pre-Workout
- Legion Athletics Pulse vs Transparent Labs Lean Pre-Workout
- Gorilla Mind Gorilla Mode Nitric vs Transparent Labs Stim-Free Pre-Workout
- Legion Athletics Pulse vs Transparent Labs Stim-Free Pre-Workout
- Transparent Labs BULK vs Transparent Labs Stim-Free Pre-Workout
Lists that include both
- The cheapest pre-workouts per servingTransparent Labs Lean #113, Transparent Labs Stim-Free #115
- Pre-workouts without a proprietary blendTransparent Labs Lean #87, Transparent Labs Stim-Free #13
- Clinically dosed pre-workouts, checked against the researchTransparent Labs Lean #92, Transparent Labs Stim-Free #13
- Pre-workouts without creatineTransparent Labs Lean #58, Transparent Labs Stim-Free #10
Every comparison · Pre-workout lists · What the Record covers
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Save either one as Considering. Your Locker keeps the dated label reference, and optional monitoring tells you if a formula you rely on changes before you reorder.