Capsules · Circulation & Performance

Nitric Oxide

4.7 · 690 reviews

Better blood flow, in two capsules. A targeted blend of L-citrulline and L-arginine — the amino acids your body turns into nitric oxide — to widen blood vessels, boost circulation and support the pump, stamina and vascular health.

Vascular health & circulation
Better pumps & blood flow
Stamina & endurance support

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1 jar · starter 30 servings · 60 capsules £39.99 Best value 3 jars · best value £36.00 / each £108.00£119.97

£39.99

30 servings · 60 capsules · ships in 1–2 days

The blood-flow molecule

How nitric oxide opens you up

Nitric oxide tells your blood vessels to relax and widen — so more oxygen and nutrients reach your muscles. We pair L-citrulline DL-malate with two forms of L-arginine, the amino acids your body converts into nitric oxide, to support circulation, the pump and vascular health from the inside out.

How it works

Dialled-in dosing

Two amino acids, one job

No proprietary fluff — just L-citrulline and L-arginine in clean vegetable capsules, dosed to support nitric oxide production. Take two before training or daily for circulation.

— 1 bottle = 60 vegan capsules (30 servings)
— 2 capsules = 400 mg citrulline + 400 mg arginine blend

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What's inside?

Three nitric-oxide actives

L-citrulline and two forms of L-arginine to fuel nitric oxide.*

L-Citrulline DL-Malate

amino acid400 mg

Converts to arginine for a longer, steadier rise in nitric oxide — plus malate for stamina and reduced fatigue.

L-Arginine HCl

amino acid350 mg

A direct nitric-oxide precursor that signals blood vessels to relax and widen for better flow.

L-Arginine AKG

alpha-ketoglutarate50 mg

An absorbable form of arginine prized in pre-workouts for supporting the muscle pump.

Supplement Facts

Serving Size: 2 Capsules · Servings Per Container: 30

Amount Per Serving% DV

L-Citrulline DL-Malate400 mg**

L-Arginine Hydrochloride350 mg**

L-Arginine Alpha-Ketoglutarate50 mg**

** Daily Value (DV) not established.

Other Ingredients: Cellulose (vegetable capsule), Brown Rice Flour.

Clean aminos, nothing hidden

400 mg L-citrulline DL-malate, 350 mg L-arginine HCl and 50 mg L-arginine alpha-ketoglutarate, in a vegetable capsule with brown rice flour. No stimulants, no fillers. Made in the USA — 60 capsules.

WARNING: Not for use by those with low blood pressure or on blood-pressure or erectile-dysfunction medication, pregnant or nursing women, or anyone under 18. Consult a physician if you have a medical condition.

*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.

How to take

Two capsules with water

capsules · once a day

Two capsules with water

Take 2 capsules with 6–8 oz of water — the label's recommended serving.

30–45 min pre-workout

For the pump, take them about 30–45 minutes before training so nitric oxide peaks as you start.

Or daily for circulation

Prefer everyday vascular support? Take them at the same time each day, consistently.

How it feels

Better flow, bigger pumps

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Illustrative, self-reported data for presentation only — not a clinical claim.

FAQ

Good to know

It signals your blood vessels to relax and widen, so blood, oxygen and nutrients flow more freely — supporting the pump, endurance and vascular health.
Citrulline gives a longer, steadier nitric-oxide rise, while arginine gives a more direct boost. Together they cover both for better, more sustained flow.
About 30–45 minutes before training for the pump, or daily at a consistent time for everyday circulation support.
No — it's stimulant-free, so it won't keep you up and pairs well with a separate caffeine source if you want one.
Anyone with low blood pressure, on blood-pressure or ED medication, pregnant or nursing, or under 18 should avoid it and consult a physician first.