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Transparent Labs
LEAN
Our analysis — editorial take, not from the label
The cutting version of the same fully disclosed label, and every performance number is smaller than BULK's: 6 g citrulline malate instead of 8 g, 2 g beta-alanine instead of 4 g, 1.5 g betaine instead of 2.5 g. What it adds is a micronutrient group (iodine, zinc, selenium, copper, chromium), 1 g of acetyl L-carnitine and 500 mg of choline, plus an Informed Choice mark printed on the front of the tub.
- Caffeine
- 180 mg
- Citrulline
- 6 gmalate
- Beta-alanine
- 2 g
- Servings
- 30
Price tier: Premium · relative cost per full serving across this database
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Eight naturally flavored options (Blue Raspberry, Cherry Splash, Fruit Punch, Green Apple, Orange, Raspberry Hibiscus, Sour Grape, Strawberry Lemonade); sweetened with stevia extract and Rebaudioside M and colored with beet root powder, with no artificial sweeteners or dyes.
Label verified: September 2026 · View label source
Label data
Per full serving · 30 servings per container · from the manufacturer's panel
| Caffeine | 180 mg |
|---|---|
| Citrulline Malate | 6 g |
| Beta-Alanine | 2 g |
| Betaine Anhydrous | 1.5 g |
| Proprietary blend | No |
Primary label source: Transparent Labs — official product page (per-scoop doses and the ~162 mg actual-caffeine FAQ) · verified September 2026
Cautions
- The 180 mg on the panel is PurCaf green-coffee extract, not pure caffeine, so the caffeine actually delivered is somewhat under that figure
- Beta-alanine tingles (harmless skin prickling) are possible at 2 g
- Every scoop carries a micronutrient group — 225 mcg iodine (150% DV), 15 mg zinc, 55 mcg selenium, 1 mg copper and 200 mcg chromium (571% DV) — which stacks with a multivitamin
Formulated for healthy adults — not intended for anyone under 18. Full health & safety notes
Product details
Where this label sits
Transparent Labs LEAN sits in the moderate stim tier of the Scoop Sense pre-workout database, which spans 0–400 mg of caffeine per serving. Every active ingredient on the panel is listed with its own dose — nothing is hidden inside a blend total. It runs 30 servings per container at the full labeled serving. Everything on this page comes from the manufacturer's supplement facts panel as of September 2026 — never from the marketing page.
Key ingredients & studied doses
- Citrulline Malate · 6 g. At the bottom of the 6-8 g range used in most citrulline malate studies; at a 2:1 ratio that is roughly 4 g of actual citrulline.
- Beta-Alanine · 2 g. Under the 3.2 g/day used in most beta-alanine research, and half of what Transparent Labs puts in BULK.
- Betaine Anhydrous · 1.5 g. Below the 2.5 g amount used in most betaine studies.
- Caffeine · 180 mg. Printed as 180 mg of PurCaf green-coffee extract and paired 1:1 with 180 mg of L-theanine, the ratio used in most caffeine-plus-theanine focus research.
Flavors & sweetener
Eight naturally flavored options (Blue Raspberry, Cherry Splash, Fruit Punch, Green Apple, Orange, Raspberry Hibiscus, Sour Grape, Strawberry Lemonade); sweetened with stevia extract and Rebaudioside M and colored with beet root powder, with no artificial sweeteners or dyes.
Who it's best for
Most regular gym-goers — the caffeine dose is in the range of about two cups of coffee. Derived from the label figures above — not medical advice.
How we log this label
Every entry is built the same way: we read the current supplement facts panel, log each disclosed dose, compare it against the amounts used in published research, flag proprietary blends, and state the cautions plainly. The full methodology explains each step.
This label against the research
How we evaluate labelsEach bar shows the amount commonly used in published human research, and where this label's dose falls against it. Research amounts are context, not a recommendation — they are not doses, and nothing here is medical advice. The bars compare what the label states; we do not laboratory-test the product to confirm it.
-
Citrulline6 g
At or above the studied amount0studied range 6 g–8 g10 g
Studies use about 6 g of pure L-citrulline, or 8 g of citrulline malate — which is about 5.3 g of citrulline at the usual 2:1 ratio, and closer to 4 g if the label is 1:1.
Source: Gough et al., European Journal of Applied Physiology 2021 — “The most commonly employed dose of CM is a single acute 8 g dose”
-
Beta-alanine2 g
63% of the low end of the studied range0studied range 3.2 g–6.4 g7 g
Studied as a daily loading protocol of 3.2–6.4 g taken for four weeks or longer. A single serving below that range still counts toward the daily total, but one scoop is not a studied dose on its own.
Source: Rezende et al., Frontiers in Physiology 2020 — “It seems that substantial amounts of BA are required to increase MCarn, with most studies using doses of ~3.2–6.4 g·day−1, for periods ranging from 4 to 24 weeks.”
-
Betaine1.5 g
60% of the low end of the studied range0studied range 2.5 g3.5 g
Trials run from 1.25 g to 5 g a day; 2.5 g, usually split into two doses, is the amount most of them use.
Source: Lee et al., Journal of the International Society of Sports Nutrition 2010 — “Betaine supplement (B) was given as 1.25 grams (g) of betaine (Danisco Inc., Ardsley, NY) in 300 mL of Gatorade© sports drink, taken twice daily”
-
Caffeine180 mg
90% of the low end of the studied range0studied range 200 mg–400 mg450 mg
Performance studies most often use 3–6 mg per kg of body weight, which works out to roughly 200–400 mg for most adults. The FDA cites 400 mg a day as an amount not generally associated with negative effects in healthy adults.
Source: Guest et al., Journal of the International Society of Sports Nutrition 2021 — “Caffeine has consistently been shown to improve exercise performance when consumed in doses of 3–6 mg/kg body mass.”
Common questions about Transparent Labs LEAN
How much caffeine is in Transparent Labs LEAN?
180 mg per full labeled serving — roughly 1.9 small cups of coffee. Within the Scoop Sense pre-workout database (0–400 mg per serving) that places it in the moderate stim tier. The FDA cites about 400 mg per day as an amount generally not associated with negative effects in healthy adults, and coffee, tea, and energy drinks count toward the same total.
Why does Transparent Labs LEAN make my skin tingle?
The 2 g of beta-alanine. The prickling (paresthesia) in the face, neck, and hands is generally considered harmless, is dose-dependent, and fades on its own — typically within about an hour. Most beta-alanine studies use 3.2 g per day.
Does Transparent Labs LEAN disclose every dose?
Yes — the label lists an individual amount for each ingredient, with no proprietary blends. That is what the "label fully disclosed" tag on Scoop Sense means, and it is what lets each dose be compared against the amounts used in published research.
Do the numbers for Transparent Labs LEAN assume one scoop or two?
All figures on this page are per full labeled serving. Every scoop carries a micronutrient group — 225 mcg iodine (150% DV), 15 mg zinc, 55 mcg selenium, 1 mg copper and 200 mcg chromium (571% DV) — which stacks with a multivitamin.