Bigger, fuller pumps
More nitric oxide means more blood flow to muscle — the pump you can see and feel mid-workout.
★ Pumps & Blood Flow
L-Citrulline & L-Arginine Stack
2:1citrulline to arginine
Made in the USA
N.O.nitric-oxide support
L-Citrulline DL-Malate plus L-Arginine — the amino-acid duo that fuels nitric oxide production for bigger pumps, better blood flow, and more endurance in the gym. Own your performance.
✓ Bigger, fuller pumps
✓ More reps, less fatigue
✓ Faster recovery
✓ Circulation support
L-Citrulline & L-Arginine Stack
$33.99
WHY IT WORKS
What citrulline and arginine do together.
Nitric oxide widens your blood vessels so more oxygen and nutrients reach working muscle. L-citrulline raises nitric oxide even more reliably than arginine alone — so we pair them for the full effect.
More reps, less fatigue
Citrulline malate is studied for increasing training volume and delaying muscular fatigue.
Faster recovery
Better circulation helps clear metabolic byproducts — studied for reduced next-day soreness.
Circulation support
Nitric oxide supports healthy blood flow beyond the gym, including normal vascular function.
The Research
The nitric-oxide science, cited.
Citrulline and arginine are among the most-studied performance amino acids. Here are the sources.
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+53% reps
In a placebo-controlled trial, citrulline malate before training significantly increased the number of reps performed and reduced muscle soreness at 24 and 48 hours.
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Arginine ↑
L-citrulline raises plasma L-arginine and nitric-oxide availability more effectively than supplementing L-arginine directly, because more of it survives first-pass metabolism.
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Blood pressure
Clinical studies show L-citrulline supplementation can support healthy blood pressure and vascular function via the nitric-oxide pathway.
Simple as 1 · 2 · 3
Prime, pump, perform.
1
Take before training
Take your serving 30-45 minutes before your workout on an empty-ish stomach.
2
Feel the pump build
Nitric-oxide effects build over the first couple of weeks of consistent use as levels rise.
3
Own your training
Bigger pumps, more reps, faster recovery. Subscribe so you're always stocked.
How to Use How to take the citrulline-arginine stack
Take the recommended serving 30-45 minutes before training, ideally on a relatively empty stomach for best absorption.
Timing
30-45 min pre-workout is the sweet spot.
Empty-ish stomach
Absorbs best without a big meal beforehand.
Stacks with
Pairs perfectly with our Creatine for strength + pumps.
Hydration
Drink water — blood flow needs fluid.
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View productWarnings Warnings & safety
Allergy warning
Do not use if hypersensitive to any listed ingredient. Produced in a facility that also processes other supplements.
Pregnancy & nursing
If pregnant or nursing, consult your healthcare practitioner before use.
Interactions
Nitric-oxide precursors can lower blood pressure and interact with ED, blood-pressure, and heart medications. Consult your physician before use if you take any of these.
General
Keep out of reach of children. Do not exceed the recommended serving. Do not use if the safety seal is broken.
See the difference
Why athletes choose LUVO's N.O. stack.
LUVO
Others
Citrulline AND arginine — not just one
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Disclosed doses in a 2:1 ratio
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No proprietary 'NO matrix' hiding amounts
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Third-party tested, every batch
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Certificate of Analysis published
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Subscribe & save — no fees, cancel anytime
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Verified Reviews
What lifters say about the N.O. stack.
4.6
276 verified reviews
✓ Verified Buyer
Insane pumps
The vascularity by my third set is unreal. Best pump product I've used.
✓ Verified Buyer
More reps in the tank
Getting an extra couple reps on every set. Volume is up across the board.
✓ Verified Buyer
Less sore next day
Recovery is noticeably better — I can hit the same muscle sooner. Love it.
✓ Verified Buyer
Good pre-workout add
Stacked with my caffeine and the pump is next level. Would recommend.
✓ Verified Buyer
Both aminos, real doses
Tired of NO blends hiding the amounts. This one prints them. That's why I bought it.
✓ Verified Buyer
Endurance up
Cardio and lifting both feel easier at the same effort. Better blood flow for sure.
✓ Verified Buyer
Stacks great with creatine
Running both and my strength and pumps are the best they've been.
✓ Verified Buyer
Vascular and full
Muscles look fuller all day, not just in the gym. Great stuff.
✓ Verified Buyer
Solid and clean
No jitters, just flow and pump. Does what it says.
✓ Verified Buyer
Better workouts
More reps, better pump, faster recovery. The trifecta. Reordering.
✓ Verified Buyer
Noticeable in a week
Pumps got bigger within days and kept building. Impressed.
✓ Verified Buyer
No crash
Not a stim, so no crash — just steady blood flow through the whole session.
✓ Verified Buyer
Takes consistency
Wasn't dramatic day one but by week two the pumps were clearly better.
✓ Verified Buyer
Gym staple now
Take it 40 min before and I'm dialed. Part of every training day.
✓ Verified Buyer
Recovery game changer
Back-to-back leg days are actually doable now. Soreness way down.
✓ Verified Buyer
Full muscles all day
The pump lingers well after training. Confidence booster honestly.
✓ Verified Buyer
Happy repeat buyer
Third bottle. Reliable pumps and reps. The subscribe price is great.
✓ Verified Buyer
Endurance athlete approved
Longer efforts feel more sustainable. Blood flow support is real.
✓ Verified Buyer
Clean pump product
No junk, disclosed doses, real results. Exactly what I wanted.
✓ Verified Buyer
Best pumps of my life
Sounds dramatic but it's true. Vascular, full, and more reps. Highly recommend.
Good Questions
Everything you might be wondering about the N.O. stack.
Why combine citrulline with arginine? +
Nitric oxide is made from arginine, but taken directly much of it is broken down before it reaches your blood. L-citrulline converts into arginine downstream and raises nitric oxide more reliably — so pairing them covers both routes.
When should I take it? +
30-45 minutes before training, ideally without a big meal, so it's absorbed and working by the time you start your first set.
Will I feel it the first time? +
Many people feel a bigger pump on day one, but nitric-oxide benefits build over the first week or two of consistent use.
Can I stack it with creatine or pre-workout? +
Yes. It pairs especially well with creatine (strength) and caffeine (energy) — it's a pump-and-endurance ingredient, not a stimulant.
Is it safe? +
Well tolerated for healthy adults. Because it supports blood flow, consult your physician first if you take blood-pressure, heart, or ED medication.
How does Subscribe & Save work? +
Ships on your schedule at the member price. Skip, pause, or cancel anytime — no fees.
