BULK PUMP is a stimulant-free liquid glycerol shot built around muscle hydration and fullness. Glycerol is an osmolyte, meaning it pulls water into muscle cells and holds it there, which is what produces the full, tight feeling during a session. Betaine Anhydrous works alongside it on cell volume and power output. Alpha-GPC 50% supports acetylcholine for focus and mind-muscle connection, and Pink Himalayan Salt adds trace electrolytes to support the hydration side. Liquid format means no scoop and no mixing. Caffeine-free, so it works for evening sessions or stacked on top of a pre-workout you already use without adding stimulants. Available in a 30-serving and 60-serving size. Rocket Pop and Sour Gummy.†
Key Ingredients: BlackMarket Labs BULK PUMP
- Liquid Glycerol for cell volumization and hydration
- Betaine Anhydrous for cell volume and power output
- Alpha-GPC 50% for acetylcholine support and focus
- Pink Himalayan Salt for trace electrolytes
- Stimulant free and caffeine free
- Liquid shot, no mixing required
- 30-serving and 60-serving sizes
- Flavors: Rocket Pop, Sour Gummy
- Stackable or standalone
- California Prop 65 Warning applies.
BlackMarket Labs lists the featured ingredients but does not publish individual doses for this product. Exact amounts are on the bottle's Supplement Facts panel. Ask our staff if you want the numbers before you buy.
Why Liquid Glycerol
Glycerol in powder form is notoriously difficult to work with. It attracts moisture from the air, which is why powdered glycerol products clump into a solid brick and why most are only 50% to 65% actual glycerol by weight, with the rest being carrier. A liquid format sidesteps that problem entirely. No clumping, no carrier dilution, and no waiting for anything to dissolve.†
How Glycerol Works
Glycerol is an osmolyte. It draws water into muscle cells and holds it there, raising intracellular fluid volume. That is a different mechanism from the nitric oxide pump that citrulline and nitrates produce, which widens blood vessels. The two work on separate systems, which is why glycerol products stack well with citrulline-based pre-workouts rather than overlapping with them.†
Betaine and Alpha-GPC
Betaine Anhydrous is an osmolyte as well, supporting cell volume alongside the glycerol, and it has been studied for power output and training volume. Alpha-GPC at 50% concentration crosses the blood-brain barrier and supports acetylcholine, the neurotransmitter tied to focus and mind-muscle connection. Together they extend what the product does beyond hydration alone.†
Hydration Matters Here
Glycerol only works if there is water available to move. Drink adequate fluid through the day, not just at training time. Under-hydrated, you will not notice much.†
Frequently Asked Questions
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Can I stack it with my pre-workout?
Yes. It contains no stimulants, so it layers onto any caffeinated pre-workout without changing your caffeine intake.† -
Can I take it at night?
Yes. Caffeine free, so evening training will not affect sleep.† -
How is this different from a citrulline pump product?
Different mechanism. Citrulline supports nitric oxide and blood vessel widening. Glycerol moves water into the muscle cell. Many people run both.† -
What is the difference between the two sizes?
Serving count only. The 60-serving option is the same formula in a larger bottle.†
How to Take BULK PUMP
Follow the serving directions on the bottle. Take before training, alone or alongside your pre-workout. Drink adequate water throughout the day. Not intended for anyone under 18. Do not use if pregnant or nursing. Consult a physician before use if you have a medical condition or take prescription medication.
Why Buy at Get Yok'd
- Real-time inventory across all six Southern California stores
- Available in Burbank, Glendale, Glendale Galleria, North Hollywood, Northridge, and Pasadena
- Authorized BlackMarket Labs retailer, carrying BULK PUMP alongside BULK, DEFY, AdreNOlyn, and RAW Beta-Alanine
- Staff who can tell you whether a glycerol product or a citrulline product fits what you are after
- One of the best loyalty programs in the supplement industry: earn rewards on every purchase
Who Should Exercise Caution
- Not intended for anyone under 18
- Not for pregnant or nursing women
- Individuals with kidney disease should consult a physician, since glycerol increases renal processing demand
- Consult a physician before use if taking any prescription medications or having any medical condition
- California Prop 65 Warning applies.
- 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.