Transparent Labs - Lean

Transparent Labs Lean Pre-Workout is the purpose-built cutting and body recomposition formula in the Transparent Labs pre-workout lineup — featuring the same foundation of fully disclosed, research-calibrated pump and endurance ingredients as Bulk, but with caffeine dialed to a moderate 180mg and an added thyroid support and fat metabolism complex in place of the testosterone micronutrients in Bulk. 21 active ingredients. 180mg organic PurCaf caffeine from green coffee beans. 6,000mg citrulline malate, 2,000mg beta-alanine, 1,500mg betaine, 1,000mg ALCAR. Five thyroid and metabolic minerals — Zinc, Iodine, Chromium, Selenium, Copper. Informed Choice certified. Third-party tested. No artificial anything. 30 servings.†

Full Supplement Facts — Transparent Labs Lean Pre-Workout (Per 1 Scoop Serving)

Thyroid and Metabolic Support Complex

• Zinc (as Zinc Amino Acid Chelate) — 15mg
• Copper (as Copper Amino Acid Chelate) — 1mg
• Iodine (as Iodine Chelate) — 225mcg — over 100% DV
• Chromium (as Chromax Chromium Picolinate) — 200mcg — 571% DV
• Selenium (as L-Selenomethionine) — 55mcg — ~91% DV

Performance Matrix

• Citrulline Malate 2:1 — 6,000mg
• Beta-Alanine — 2,000mg
• BetaPure Betaine Anhydrous — 1,500mg
• Acetyl L-Carnitine HCl — 1,000mg
• Choline Bitartrate — 500mg

Energy and Focus Matrix

• PurCaf Organic Caffeine (Green Coffee Bean) — 180mg
• L-Theanine — 180mg
• Theobromine — 50mg
• Huperzine A (Huperzia serrata) — 100mcg
• BioPerine (Black Pepper Extract) — 5mg

Zero artificial sweeteners, flavors, or colors. Sweetened with stevia. Naturally colored with Beet Root Powder. Informed Choice certified. Third-party tested. 30 servings. Available in 9 flavors: Sour Peach, Blue Raspberry, Green Apple, Orange, Cherry Limeade, Sour Grape, Strawberry Lemonade, Tropical Punch, Watermelon. California Prop 65 Warning applies.

What's Inside Transparent Labs Lean Pre-Workout

Thyroid and Metabolic Support Complex — What Makes Lean Different from Bulk

The defining difference between Lean and Bulk is this five-mineral thyroid and metabolic support complex. While Bulk carries testosterone-supporting micronutrients (Vitamin D3, Zinc, Boron, Vitamin B6, B12), Lean swaps those out for a mineral profile specifically targeting the thyroid-metabolism axis — the hormonal system that governs how efficiently your body burns calories at rest, converts stored fat to energy, and maintains overall metabolic rate. During a caloric deficit, thyroid function is under pressure — reduced calorie intake can suppress T3 and T4 production, slowing metabolism at the exact moment you need it running efficiently. These five minerals directly support thyroid hormone synthesis and peripheral conversion.†

• Iodine (as Iodine Chelate) — 225mcg — iodine is the rate-limiting building block of thyroid hormones T3 and T4. The thyroid physically incorporates iodine atoms into thyrosine residues on thyroglobulin to produce both hormones. Without sufficient iodine, thyroid hormone synthesis is directly impaired regardless of all other factors. Chelated iodine provides superior absorption versus inorganic iodide forms. At 225mcg — over 100% of the Daily Value — this provides a complete daily dose of iodine specifically to support full thyroid hormone production capacity.†
• Selenium (as L-Selenomethionine) — 55mcg — the organic, highest-bioavailability form of selenium. Selenium is the cofactor for iodothyronine deiodinase — the enzyme that converts the less active T4 thyroid hormone into the biologically active T3. Without selenium, iodine alone cannot produce functional thyroid activity because the T4-to-T3 conversion step cannot occur. Selenium deficiency is one of the most overlooked contributors to suboptimal thyroid function even when iodine status is adequate.†
• Zinc (as Zinc Amino Acid Chelate) — 15mg — chelated zinc for maximum absorption. Zinc is essential for thyroid hormone receptor function, thyroid hormone synthesis, and the T4-to-T3 conversion alongside selenium. Athletes who train intensely and sweat heavily lose zinc at rates that significantly exceed dietary intake — making zinc repletion particularly relevant for the cutting athlete whose dietary intake may already be reduced.†
• Chromium (as Chromax Chromium Picolinate) — 200mcg (571% DV) — Chromax is the patented, research-backed form of chromium picolinate with the most extensive human clinical evidence. Chromium activates chromodulin, which amplifies insulin receptor signaling to stabilize blood glucose. Stable blood sugar during a caloric deficit directly supports appetite control, reduces carbohydrate cravings, and maintains more consistent energy availability during training sessions. At 571% of the Daily Value, this is a genuinely functional metabolic dose.†
• Copper (as Copper Amino Acid Chelate) — 1mg — copper plays a role in thyroid hormone production and is included at a maintenance dose that also counterbalances the zinc in the formula. High-dose zinc supplementation without copper can deplete copper over time — the 15:1 zinc-to-copper ratio in Lean reflects this relationship.†

Performance Matrix

• Citrulline Malate 2:1 — 6,000mg — the same proven NO booster in Bulk, at 6g versus Bulk's 8g. Still a meaningful pump dose that significantly improves blood flow, oxygen delivery, and training endurance — the 2g difference is the primary reason Bulk delivers more pronounced muscle fullness during training.†
• Beta-Alanine — 2,000mg — the carnosine buffer for muscular endurance at 2g, versus 4g in Bulk and Stim-Free. Effective carnosine support at a dose that produces mild-to-moderate paresthesia rather than the pronounced tingling at the 4g level.†
• BetaPure Betaine Anhydrous — 1,500mg — the verified-purity betaine form at 1.5g. Supports muscle cell osmolyte function, methyl donation, and internal creatine precursor activity. At 1.5g (versus 2.5g in Bulk and Stim-Free), it is the most significant dose reduction versus the other Transparent Labs formulas.†
• Acetyl L-Carnitine HCl (ALCAR) — 1,000mg — the unique inclusion in Lean not present in Bulk or Stim-Free at this dose. ALCAR serves two parallel functions: as the acetylated, brain-penetrating form of carnitine it supports acetylcholine production for cognitive focus; as carnitine, it supports fatty acid transport into the mitochondria for oxidation as fuel. During a caloric deficit with reduced carbohydrate intake, ALCAR's role in supporting fat-as-fuel utilization becomes more practically relevant.†
• Choline Bitartrate — 500mg — acetylcholine precursor for neuromuscular signaling and cognitive function. Works synergistically with ALCAR and Huperzine A to support the full cholinergic focus stack. Also a lipotropic agent involved in liver fat metabolism.†

Energy and Focus Matrix

• PurCaf Organic Caffeine — 180mg — organic caffeine from green coffee beans, the same high-quality source used across the Transparent Labs pre-workout line. At 180mg, Lean is positioned as a moderate-stimulant pre-workout — meaningfully energizing without the intensity of Bulk (200mg) or Bulk Black (297mg). The moderate caffeine dose is a deliberate choice for cutting phases: athletes in a caloric deficit often experience greater stimulant sensitivity, making a lower caffeine dose more appropriate for consistent daily use without adrenal fatigue or sleep disruption.†
• L-Theanine — 180mg — matched 1:1 with caffeine, the research-validated ratio for smoothing caffeine's stimulant effects. L-Theanine reduces caffeine-induced jitteriness, blunts the anxiety response to caffeine, and extends the cognitive clarity benefits by modulating alpha brain waves. The caffeine-theanine combination consistently outperforms caffeine alone on cognitive performance measures in research.†
• Theobromine — 50mg — the mild stimulant alkaloid from cacao that complements caffeine through a different mechanism — it is a longer-acting, milder xanthine that adds sustained energy tail to the caffeine peak without adding acute stimulant load. Theobromine also has mild vasodilatory properties that complement the citrulline pump matrix.†
• Huperzine A — 100mcg — acetylcholinesterase inhibitor that elevates acetylcholine by blocking its breakdown. The most potent non-stimulant focus ingredient available, working synergistically with choline bitartrate and ALCAR to build and sustain acetylcholine levels throughout the workout.†
• BioPerine (Black Pepper Extract, 95% Piperine) — 5mg — absorption enhancer that inhibits metabolic enzymes to improve bioavailability of all other active ingredients in the formula.†

Frequently Asked Questions About Transparent Labs Lean Pre-Workout

1. Is Lean actually effective for fat loss or is that just marketing?
   Honest answer: the thyroid and metabolic support complex is meaningful nutritional insurance during a caloric deficit, not a fat-burning accelerant in the traditional stimulant-thermogenic sense. The Chromax chromium picolinate at 571% DV has genuine clinical evidence for blood sugar management and appetite control — that is real and practically useful during a cut. The iodine, selenium, zinc, and copper combination genuinely support thyroid hormone synthesis and conversion at doses that address common deficiencies. ALCAR at 1g provides meaningful support for fat-as-fuel metabolic pathways. What Lean does not do is produce dramatic thermogenic effects or dramatically accelerate fat burning beyond what a proper caloric deficit and training program achieve. It supports the hormonal and metabolic environment for a cut — it does not replace the diet.†
2. How does Lean compare to Bulk and Stim-Free?
   Lean vs. Bulk: Lean has 2g less citrulline malate, 2g less beta-alanine, 1g less betaine, and trades Bulk's testosterone micronutrients for the thyroid and metabolic mineral complex. Lean adds ALCAR 1,000mg, which Bulk does not contain. Caffeine is 180mg versus 200mg in Bulk. For pure training performance, Bulk delivers more per scoop. For athletes specifically in a caloric deficit or cutting phase who want the metabolic and thyroid nutritional support built into their pre-workout, Lean is the purpose-fit choice. Lean vs. Stim-Free: Lean has caffeine and is a stimulant product; Stim-Free has none. Stim-Free has significantly higher citrulline, beta-alanine, and betaine doses, plus elevATP. Use Lean when you want caffeine and thyroid support; use Stim-Free for evening sessions or caffeine cycling.†
3. Can I stack Lean with Transparent Labs Creatine HMB?
   Yes — and this is one of the most common and well-designed stacks in the Transparent Labs lineup. Because Lean (like all Transparent Labs caffeinated pre-workouts) intentionally excludes creatine — research has shown large doses of caffeine can interfere with creatine's ergogenic effects when taken simultaneously — creatine is kept as a standalone supplement. Taking Creatine HMB separately (post-workout or at a different time of day) allows you to get both the full pre-workout performance benefits of Lean and the full creatine and HMB benefits without interference.†
4. What flavors are available and how does it taste?
   Nine flavors: Sour Peach, Blue Raspberry, Green Apple, Orange, Cherry Limeade, Sour Grape, Strawberry Lemonade, Tropical Punch, and Watermelon. All naturally sweetened with stevia and naturally colored with beet root powder. User feedback consistently highlights the flavor quality as among the best in the clean pre-workout category — the naturally flavored profile without the artificial taste that comes from sucralose and artificial dyes. Sour and citrus flavors like Sour Peach, Green Apple, and Cherry Limeade are particularly well reviewed for the naturally flavored category.

How to Take Transparent Labs Lean Pre-Workout

For first-time use, start with half a scoop mixed with 6-8oz of cold water 20-30 minutes before training to assess tolerance. For full effect, take 1 level scoop mixed with 10-12oz of cold water 20-30 minutes before training. Do not exceed 1 scoop per day. Best taken on an empty stomach or at least 90 minutes after a meal. Do not take within 5-6 hours of bedtime. Stack with Transparent Labs Creatine HMB post-workout for complete performance support. California Residents: This product can expose you to chemicals including Lead, known to the State of California to cause cancer and birth defects or other reproductive harm. Visit www.P65Warnings.ca.gov/food for more information.†

Other Transparent Labs Products at Get Yok'd

• Transparent Labs Bulk Pre-Workout — the muscle-building counterpart with higher citrulline, beta-alanine, betaine and testosterone micronutrients
• Transparent Labs Bulk Black Pre-Workout — the high-stim version with 297mg caffeine for maximum intensity
• Transparent Labs Stim-Free Pre-Workout — zero caffeine evening training option with maximum pump doses
• Transparent Labs Creatine HMB — the recommended creatine stack for Lean users
• Transparent Labs Grass-Fed Whey Protein Isolate — 28g protein post-workout complement to the cutting stack

Why Buy Supplements at Get Yok'd

• Real-time inventory across all five Southern California stores
• Available in Burbank, Glendale, Glendale Galleria, Pasadena, and North Hollywood
• Authorized retailer of Transparent Labs
• One of the best loyalty programs in the supplement industry — earn rewards on every purchase
• Owned and operated by fitness enthusiasts who actually use what we sell

Who Should Not Take Transparent Labs Lean Pre-Workout

• Not for use by persons under 18
• Not for pregnant or nursing women
• Do not use if sensitive to caffeine — contains 180mg PurCaf organic caffeine plus theobromine
• Do not take within 5-6 hours of bedtime
• Consult a physician before use if you have cardiovascular conditions, high blood pressure, or are taking any prescription medications
• Huperzine A may interact with acetylcholinesterase-inhibiting medications — consult a physician if taking medications for Alzheimer's or related conditions
• Chromium may affect blood glucose regulation — consult a physician if diabetic or on blood sugar medications
• California Residents: This product can expose you to chemicals including Lead, known to the State of California to cause cancer and birth defects or other reproductive harm. Visit www.P65Warnings.ca.gov/food for more information.
• Keep out of reach of children

†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.