Lean Preworkout

Name: Lean Preworkout
Brand: Transparent Labs
Price: 49.99 USD
Availability: InStock

Photo and title link to Amazon · paid link, a search, not a verified listing · the rating is unaffected

Dose integrity 45% weight 6.67/10

Value 30% weight 2.44/10

Consensus 25% weight 9.20/10

Cost in category per dosed serving

$2.50 median

$1.00 Cheaper than 24% of 42 scored pre-workouts $3.58

Consensus source: 4.6/5 across 2,471 buyer reviews on the brand's storefront · source ↗ · captured 2026-10-18. Brand-site reviews skew positive; see how we rate.

6.03/ 10

Composite score Strong

Composite score · 100% of category weighting covered

Nutrition

14.2 g per serving · 30 servings per container
Nutrition (per serving)	Amount
Protein	not enough data
Calories	5
Total Carbs	1 g
Sugar	not enough data
Sugar Alcohols	not enough data
Fat	not enough data
Fiber	not enough data
Sodium	5 mg

Dose audit

Ingredient	Disclosed dose	Clinical threshold	Status	Source
Citrulline Malate 2:1	6,000 mg	8,000 mg	UNDER	Perez-Guisado & Jakeman, J Strength Cond Res 2010 — 8 g citrulline malate
Beta-Alanine	2,000 mg	4,000 mg	UNDER	Trexler et al., ISSN Position Stand 2015, J Int Soc Sports Nutr 2015;12:30 (PMID 26175657) — 4-6 g/day; the threshold uses the low end, 4 g
Betaine Anhydrous	1,500 mg	2,500 mg	UNDER	Cholewa et al., J Int Soc Sports Nutr 2013 — 2.5 g/day
Choline Bitartrate	500 mg	2,000 mg	UNDER	Naber, Hommel & Colzato, Sci Rep 2015;5:13188 — trial dosing 2 g
L-Theanine	180 mg	100 mg	MET	Giesbrecht et al., Nutr Neurosci 2010 — 97 mg paired with caffeine
Caffeine	180 mg	200 mg	UNDER	Guest et al., ISSN Position Stand 2021, J Int Soc Sports Nutr 2021;18:1 (PMID 33388079) — 3-6 mg/kg; the threshold is the low end, 3 mg/kg, for a 67 kg adult: 200 mg

Coverage: 8 of 10 dosed ingredients on this label matched the clinical reference.