BlackMarket Labs | BML Pump Pre-Workout | 40 Servings

BlackMarket Labs Pump is a stimulant-free, pump-first pre-workout designed around one clear formulation strategy: drive blood flow through multiple nitric oxide pathways, support intracellular hydration, and improve training quality without relying on caffeine to create the illusion of performance. That matters because the best stim-free pump formulas are not just “non-stim versions” of regular pre-workouts. They need enough vasodilators, nitrates, osmolytes, and electrolytes to make the session feel tangibly better on their own. On this label, the architecture is sound.

At a full 2-scoop serving, you get 4,000mg L-citrulline. Citrulline is a highly bioavailable precursor to arginine that bypasses first-pass liver metabolism, converts to arginine in the kidneys, and then feeds endothelial nitric oxide synthase for nitric oxide production. Research-backed performance ranges are typically 6-8g, so 4g sits below the classic standalone clinical range. That said, this formula does not ask citrulline to do all the work by itself. It is paired with nitrate sources, which is the key to understanding the formula.

Those nitrate sources are 1,000mg betaine nitrate and 500mg arginine nitrate, both as NO3-T®, ThermoLife’s patented nitrate delivery system. Nitrates increase nitric oxide availability through a separate nitrate-nitrite-NO pathway, giving the formula a second route to vasodilation beyond the arginine-NOS pathway driven by citrulline. This dual-pathway strategy is smart: citrulline supports endogenous arginine production and ammonia clearance, while nitrates provide an additional route to blood flow, vascularity, and endurance support. The use of trademarked NO3-T® matters because patented nitrate ingredients are a premium inclusion in a category where many labels avoid them entirely.

Betaine anhydrous comes in at 1,250mg. Clinical research is strongest around 2.5g daily, so this lands at half of that benchmark. On its own, that would be a moderate dose, but the formula also includes betaine nitrate, which contributes additional betaine alongside nitrate functionality. Functionally, betaine acts as an osmolyte, helping cells hold water and supporting power output, muscular endurance, and cell volumization. L-taurine is dosed at 1,000mg, which is right at the effective entry point of the 1-3g range supported in the literature. Taurine supports cellular hydration, calcium handling, and neuromuscular function, which often translates into better endurance, smoother contractions, and a more “full” training feel.

Pink Himalayan salt at 250mg helps round out the formula from a hydration and pump standpoint. Sodium supports fluid balance, plasma volume, and muscle contraction, and it works especially well alongside taurine and betaine when you want muscle fullness rather than a flat, under-hydrated session. BioPerine® is included at 2.5mg. That is below the more common 5-10mg bioavailability range from clinical use, so this is a lighter inclusion rather than a fully built-out absorption dose.

Transparency is mostly strong on named actives and dosages, but the metadata flags a proprietary blend, which creates a disconnect because the active panel provided here is otherwise disclosed. Based on the verified formula supplied, this reads like a substantially transparent label with identifiable doses on the meaningful performance ingredients.

What should you expect? Day 1, the headline experience is fuller muscles, better vascularity, easier warm-ups, and a more productive mind-muscle connection without stimulant buzz. Over 2-4 weeks of consistent use, the hydration and performance support from betaine and taurine become more reliable session to session, especially if you train hard and stay properly hydrated. This is not the most extreme stim-free pump product ever made, but it is an intelligently layered formula that earns its place by combining citrulline, patented nitrates, taurine, betaine, and electrolytes in a way that should feel immediately useful in the gym.

How to Use Blackmarket | Pump | Pre-Workout