Bulk Preworkout

Name: Bulk 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 8.88/10

Value 30% weight 5.85/10

Consensus 25% weight 9.40/10

Cost in category per dosed serving

$1.88 median

$1.00 Cheaper than 59% of 42 scored pre-workouts $3.58

Consensus source: 4.7/5 across 5,066 buyer reviews on the brand's storefront · source ↗ · captured 2026-10-18. Brand-site reviews skew positive; see how we rate.

8.10/ 10

Composite score Exceptional

Composite score · 100% of category weighting covered

Nutrition

20.8 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	180 mg

Dose audit

Ingredient	Disclosed dose	Clinical threshold	Status	Source
Citrulline Malate 2:1	8,000 mg	8,000 mg	MET	Perez-Guisado & Jakeman, J Strength Cond Res 2010 — 8 g citrulline malate
Beta-Alanine	4,000 mg	4,000 mg	MET	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	2,500 mg	2,500 mg	MET	Cholewa et al., J Int Soc Sports Nutr 2013 — 2.5 g/day
Taurine	1,300 mg	1,000 mg	MET	Balshaw et al., Amino Acids 2013;44:555-561 (PMID 22855206) — a single 1,000 mg dose in trained male middle-distance runners, randomised double-blind crossover; one of three healthy-adult trials at 1 g in the Waldron et al. Sports Med 2018 meta-analysis (doses 1-6 g)
L-Tyrosine	1,000 mg	2,000 mg	UNDER	Colzato et al., Front Behav Neurosci 2013;7:200 (PMID 24379768) — a single 2.0 g oral dose in healthy adults
Alpha-GPC	150 mg	250 mg	UNDER	Marcus et al., J Int Soc Sports Nutr 2017;14:39 (PMID 29042830) — 250 mg and 500 mg daily in 48 healthy college-aged men; the threshold uses the lower dose
Caffeine	200 mg	200 mg	MET	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
L-Theanine	200 mg	100 mg	MET	Giesbrecht et al., Nutr Neurosci 2010 — 97 mg paired with caffeine

Coverage: 8 of 12 dosed ingredients on this label matched the clinical reference.