Centurion Labz Blood Rush pump powder, front of container

Centurion Labz stim-free pump powder, Lemon Ice flavor

Centurion Labz stim-free pump powder, Peach Rings flavor

Centurion Labz Blood Rush Stim Free Pump Pre Workout Supplement Facts Coalition Nutrition

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Centurion Labz Blood Rush — Stim-Free Pump, No Caffeine or Beta-Alanine

16 reviews

Centurion Labz Blood RushA stimulant-free pump pre-workout built around citrulline, Hydromax glycerol and agmatine — with no caffeine and no beta-alanine at all.Why "no beta-alanine" is a deliberate and useful decisionMost stim-free pump products still include beta-alanine, and Blood Rush leaving it out is a considered choice rather than an omission.Beta-alanine works by accumulation. It builds muscle carnosine over four to six weeks, and the day you take it is irrelevant. So including it in a product you stack alongside another pre-workout risks doubling your dose — and doubling beta-alanine mostly means doubling the tingle rather than doubling the benefit.Leaving it out means Blood Rush stacks cleanly with anything. Whatever pre-workout you already use, adding this will not push your beta-alanine past a sensible amount.Same logic applies to caffeine: with none here, you can add it to a stimulant pre-workout without touching your daily total.The three pump mechanisms, and why they are additiveA well-built pump product covers more than one route, because "pump" is really two separate things: blood flow and cell volume. Citrulline — vasodilation. Converts to arginine in the kidneys, feeding nitric oxide production. Citrulline raises blood arginine more effectively than arginine itself, because oral arginine is largely destroyed before absorption. Full explanation on our L-Citrulline page Hydromax glycerol — cell volume. Glycerol is an osmolyte, drawing and holding water inside muscle cells. This is a genuinely different mechanism from blood flow: one widens the pipes, the other fills the cells Agmatine — a metabolite of arginine studied for its effect on nitric oxide synthase regulation, working alongside citrulline rather than duplicating itBeet root adds a nitrate pathway, which bypasses the enzyme citrulline feeds entirely — genuinely additive again.⚠ If your tub includes beet root or any nitrate source, skip antibacterial mouthwash on training days. The first step of the nitrate pathway is performed by bacteria on your tongue, not by your own cells — and mouthwash kills them, substantially blunting the effect.⚠ Glycerol needs water, or it works against youThis is the most common mistake with any glycerol product and it is easy to fix.Glycerol works by pulling water into muscle cells. If there is not enough water available, it pulls it from elsewhere — which can leave you feeling flat, headachy or worse rather than full.Drink substantially more water than usual on days you take this — considerably more than the 6 to 8oz you mix it with. That is not a general wellness suggestion; it is how the ingredient functions.⚠ An honest note on norvalineBlood Rush has historically included L-norvaline, and we would rather flag it than let you find out elsewhere.The rationale for norvaline is sound in principle: it inhibits arginase, the enzyme that breaks down arginine — so in theory it preserves the arginine citrulline produces, extending the pump.The concern is that laboratory research has raised questions about norvaline's effects on cell viability at higher concentrations. That work is in vitro — cells in a dish, not humans — and it does not establish harm at supplement doses. But it was enough that several brands have reformulated to remove it, including Project AD from NITR-OX.Our position: we are not telling you it is dangerous, because the evidence does not support that claim. We are telling you the question exists, that other brands have acted on it, and that you should know before you buy rather than after. Check your tub — formulas change, and we would rather you read the label than trust a page.Our staff earn no commission, which is why we would rather raise this than not.Specs CitrullineVasodilation via nitric oxide Hydromax glycerolCell volumisation — needs plenty of water AgmatineWorks alongside citrulline Beet rootSeparate nitrate pathway CaffeineNone Beta-alanineNone — deliberately LabelFully disclosed, third-party tested every batchHydromax is a concentrated glycerol powder — around 65% glycerol, against the 25% of older glycerol monostearate. That standardisation is the reason a sensible dose fits in a scoop.How our pump products compare Blood RushCitrulline + glycerol + agmatineStacks cleanly — no caffeine or beta-alanine NovaPump8g citrulline malate + Super SpinachMost complete Pump Script23g liquid glycerolGlycerol specialist GHOST PumpNitrate-ledDifferent primary pathwayHow to take it Half a scoop to start, in water, about 30 minutes before training. One full scoop for experienced users. Drink plenty of water through the session. The glycerol requires it. Stack it with any stimulant pre-workout — that is what it is designed for. Or use it alone in the evening, since there is nothing here to affect sleep. Skip antibacterial mouthwash on training days.Who this is for Anyone who wants a bigger pump than their pre-workout delivers People training in the evening who cannot take stimulants late Anyone cycling off stimulants but not wanting to lose their pump People whose pre-workout already has beta-alanine, where this avoids doubling up Stimulant-intolerant lifters Anyone stacking it with God of Rage UNCHAINED, which is what Centurion designed it forWho this is not forAnyone wanting energy. There are no stimulants here at all — that is the entire point.Anyone who will not drink extra water. Glycerol without adequate fluid can leave you flat rather than full.Anyone uncomfortable with norvaline, if your tub contains it. Read the label.Anyone on blood pressure medication, without speaking to a doctor — nitric oxide affects vasodilation.Not for anyone under 18, pregnant or nursing.Stack it with: any stimulant pre-workout, and creatine daily.Frequently asked questionsDoes it contain caffeine?No, none at all — which is why it stacks with any pre-workout and suits evening training.Why is there no beta-alanine?Deliberately, so stacking it with another pre-workout will not double your dose. Doubling beta-alanine mostly doubles the tingle rather than the benefit.Why do I need extra water?Glycerol works by drawing water into muscle cells. Without enough available, it pulls from elsewhere — leaving you flat or headachy rather than full.What is Hydromax?A concentrated glycerol powder at around 65% glycerol, against roughly 25% for older glycerol monostearate.What is the norvaline concern?Laboratory work has raised questions about its effects on cell viability at higher concentrations. That is in vitro rather than human evidence and does not establish harm at supplement doses — but several brands have reformulated to remove it. Check your tub.Can I use it with God of Rage?Yes, and that is exactly what Centurion designed it for. High stimulants partly work against a pump, so a separate stim-free pump product addresses that.Why does mouthwash matter?If your tub contains beet root or another nitrate source, bacteria on your tongue perform the first conversion step. Antibacterial mouthwash kills them.Can I take it in the evening?Yes. There is nothing here to affect sleep. Read more

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Centurion Labz Blood Rush

A stimulant-free pump pre-workout built around citrulline, Hydromax glycerol and agmatine — with no caffeine and no beta-alanine at all.

Why "no beta-alanine" is a deliberate and useful decision

Most stim-free pump products still include beta-alanine, and Blood Rush leaving it out is a considered choice rather than an omission.

Beta-alanine works by accumulation. It builds muscle carnosine over four to six weeks, and the day you take it is irrelevant. So including it in a product you stack alongside another pre-workout risks doubling your dose — and doubling beta-alanine mostly means doubling the tingle rather than doubling the benefit.

Leaving it out means Blood Rush stacks cleanly with anything. Whatever pre-workout you already use, adding this will not push your beta-alanine past a sensible amount.

Same logic applies to caffeine: with none here, you can add it to a stimulant pre-workout without touching your daily total.

The three pump mechanisms, and why they are additive

A well-built pump product covers more than one route, because "pump" is really two separate things: blood flow and cell volume.

Citrulline — vasodilation. Converts to arginine in the kidneys, feeding nitric oxide production. Citrulline raises blood arginine more effectively than arginine itself, because oral arginine is largely destroyed before absorption. Full explanation on our L-Citrulline page
Hydromax glycerol — cell volume. Glycerol is an osmolyte, drawing and holding water inside muscle cells. This is a genuinely different mechanism from blood flow: one widens the pipes, the other fills the cells
Agmatine — a metabolite of arginine studied for its effect on nitric oxide synthase regulation, working alongside citrulline rather than duplicating it

Beet root adds a nitrate pathway, which bypasses the enzyme citrulline feeds entirely — genuinely additive again.

⚠ If your tub includes beet root or any nitrate source, skip antibacterial mouthwash on training days. The first step of the nitrate pathway is performed by bacteria on your tongue, not by your own cells — and mouthwash kills them, substantially blunting the effect.

⚠ Glycerol needs water, or it works against you

This is the most common mistake with any glycerol product and it is easy to fix.

Glycerol works by pulling water into muscle cells. If there is not enough water available, it pulls it from elsewhere — which can leave you feeling flat, headachy or worse rather than full.

Drink substantially more water than usual on days you take this — considerably more than the 6 to 8oz you mix it with. That is not a general wellness suggestion; it is how the ingredient functions.

⚠ An honest note on norvaline

Blood Rush has historically included L-norvaline, and we would rather flag it than let you find out elsewhere.

The rationale for norvaline is sound in principle: it inhibits arginase, the enzyme that breaks down arginine — so in theory it preserves the arginine citrulline produces, extending the pump.

The concern is that laboratory research has raised questions about norvaline's effects on cell viability at higher concentrations. That work is in vitro — cells in a dish, not humans — and it does not establish harm at supplement doses. But it was enough that several brands have reformulated to remove it, including Project AD from NITR-OX.

Our position: we are not telling you it is dangerous, because the evidence does not support that claim. We are telling you the question exists, that other brands have acted on it, and that you should know before you buy rather than after. Check your tub — formulas change, and we would rather you read the label than trust a page.

Our staff earn no commission, which is why we would rather raise this than not.

Specs

Citrulline	Vasodilation via nitric oxide
Hydromax glycerol	Cell volumisation — needs plenty of water
Agmatine	Works alongside citrulline
Beet root	Separate nitrate pathway
Caffeine	None
Beta-alanine	None — deliberately
Label	Fully disclosed, third-party tested every batch

Hydromax is a concentrated glycerol powder — around 65% glycerol, against the 25% of older glycerol monostearate. That standardisation is the reason a sensible dose fits in a scoop.

How our pump products compare

Blood Rush	Citrulline + glycerol + agmatine	Stacks cleanly — no caffeine or beta-alanine
NovaPump	8g citrulline malate + Super Spinach	Most complete
Pump Script	23g liquid glycerol	Glycerol specialist
GHOST Pump	Nitrate-led	Different primary pathway

How to take it

Half a scoop to start, in water, about 30 minutes before training. One full scoop for experienced users.
Drink plenty of water through the session. The glycerol requires it.
Stack it with any stimulant pre-workout — that is what it is designed for.
Or use it alone in the evening, since there is nothing here to affect sleep.
Skip antibacterial mouthwash on training days.

Who this is for

Anyone who wants a bigger pump than their pre-workout delivers
People training in the evening who cannot take stimulants late
Anyone cycling off stimulants but not wanting to lose their pump
People whose pre-workout already has beta-alanine, where this avoids doubling up
Stimulant-intolerant lifters
Anyone stacking it with God of Rage UNCHAINED, which is what Centurion designed it for

Who this is not for

Anyone wanting energy. There are no stimulants here at all — that is the entire point.

Anyone who will not drink extra water. Glycerol without adequate fluid can leave you flat rather than full.

Anyone uncomfortable with norvaline, if your tub contains it. Read the label.

Anyone on blood pressure medication, without speaking to a doctor — nitric oxide affects vasodilation.

Not for anyone under 18, pregnant or nursing.

Stack it with: any stimulant pre-workout, and creatine daily.

Frequently asked questions

Does it contain caffeine?
No, none at all — which is why it stacks with any pre-workout and suits evening training.

Why is there no beta-alanine?
Deliberately, so stacking it with another pre-workout will not double your dose. Doubling beta-alanine mostly doubles the tingle rather than the benefit.

Why do I need extra water?
Glycerol works by drawing water into muscle cells. Without enough available, it pulls from elsewhere — leaving you flat or headachy rather than full.

What is Hydromax?
A concentrated glycerol powder at around 65% glycerol, against roughly 25% for older glycerol monostearate.

What is the norvaline concern?
Laboratory work has raised questions about its effects on cell viability at higher concentrations. That is in vitro rather than human evidence and does not establish harm at supplement doses — but several brands have reformulated to remove it. Check your tub.

Can I use it with God of Rage?
Yes, and that is exactly what Centurion designed it for. High stimulants partly work against a pump, so a separate stim-free pump product addresses that.

Why does mouthwash matter?
If your tub contains beet root or another nitrate source, bacteria on your tongue perform the first conversion step. Antibacterial mouthwash kills them.

Can I take it in the evening?
Yes. There is nothing here to affect sleep.