BULK Pre-Workout: Transparent Labs Formula and Caffeine

White Transparent Labs BULK Blue Raspberry pre-workout tub labeled 30 servings with a blue accent
Transparent Labs standard BULK Blue Raspberry, 30 servings. The article uses this flavor-specific panel; BULK BLACK is a separate formula.

Transparent Labs BULK is a named pre-workout, and standard BULK has its own formula. People also use “bulk pre-workout” loosely when discussing training for size, so the brand and complete product name matter. This guide reviews the U.S. standard BULK Blue Raspberry label verified October 13, 2026.

What one serving contains

The BULK Blue Raspberry Supplement Facts lists one 20.8 g scoop and 30 servings. Selected amounts per serving are:

  • Citrulline malate 2:1: 8 g.
  • Beta-alanine: 4 g; betaine anhydrous: 2.5 g.
  • Taurine: 1.3 g; L-tyrosine: 1 g.
  • AlphaSize: 300 mg of a 50% alpha-GPC preparation.
  • PurCaf organic caffeine: 200 mg; L-theanine: 200 mg.
  • Theobromine: 50 mg; Senactiv: 50 mg.

The label also lists vitamins and minerals, BioPerine and boron. Creatine is not listed. A creatine product displayed in a bundle or recommended alongside BULK does not become an ingredient in the powder.

Reading transparent numbers accurately

The 8 g citrulline-malate amount includes malate. It should not be rewritten as 8 g pure L-citrulline. The AlphaSize preparation’s 50% qualification also matters: 300 mg of that material corresponds arithmetically to about 150 mg alpha-GPC, rather than 300 mg pure alpha-GPC. This is label arithmetic, not a laboratory measurement of your tub.

Theobromine is separate from caffeine, so adding the two milligram amounts does not produce a meaningful “total caffeine” value. The coffee-bean origin of PurCaf likewise does not establish that the product is free of caffeine-related sleep effects or that everyone will tolerate it equally.

BULK does not mean BULK BLACK

The Transparent Labs standard BULK listing is distinct from BULK BLACK, LEAN and Stim-Free. Their shared branding does not make their serving sizes, caffeine amounts or secondary ingredients interchangeable. The Blue Raspberry photograph here matches the standard 30-serving product used for this label review.

When comparing a retailer’s description, check the exact flavor, full formula name and Supplement Facts on the container. An older review or a black-tub photograph cannot establish the current label of standard BULK. This article does not determine stock, price or the contents of a future revision.

How it fits a muscle-building decision

The name BULK is not evidence that a scoop will produce muscle growth by itself. The NIH exercise-supplement review describes important differences in ingredient evidence and study conditions. Beta-alanine findings generally concern repeated supplementation, while tingling is not a performance score. A disclosed formula is useful information, but does not prove superiority over another finished product.

Follow the package directions, account for caffeine from other sources using the FDA’s caffeine guidance, and review medication or health concerns with a clinician. Keep training, nutrition and recovery central to a size-and-strength plan. This is a source-based label guide, without invented coaching experience, taste testing or a promised outcome.

Product pages and existing offers

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Sources and review notes

Reviewed October 13, 2026. Transparent Labs standard BULK. BULK Blue Raspberry Supplement Facts. NIH ODS: exercise supplement evidence. FDA: caffeine sources and sensitivity. This is editorial guidance based on identified labels and sources, not a report of personal product testing. Product versions and offers can change.

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