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NITRIC OXIDE SUPPORT

Arginine,

fully stacked.

L-Arginine and L-Citrulline are the direct precursors to nitric oxide — the signaling molecule behind vasodilation, oxygen delivery, and workout performance. This formula stacks both, plus AKG, malate, and beta-alanine.

Shop L-Arginine Complex View Formula →

Purchases are completed at Neurobiologix, the seller. Gene Direct Nutrition may earn a commission.

PROFESSIONAL GRADE · 60 CAPSULES · L-ARGININE · L-CITRULLINE · BETA-ALANINE

L-Arginine Complex bottle
NITRIC OXIDE
2 amino-acid precursors

Arginine + citrulline. Together.

Citrulline converts to arginine in the kidney, keeping plasma arginine elevated longer than arginine alone. Combining them outperforms either isolated ingredient for sustained NO support.

PERFORMANCE
5 synergistic ingredients

Built for the training window.

L-Arginine base, arginine AKG, citrulline HCL, citrulline malate, and beta-alanine work together to support vasodilation, ammonia buffering, and lactic-acid tolerance during hard sessions.

TIMING
20 to 30 minutes before a meal

Empty stomach wins.

Two capsules once daily, 20-30 minutes before a meal with water. Pre-meal timing avoids competition with other amino acids for uptake — the same reason strength athletes dose arginine fasted.

MAY BENEFIT

Blood flow is
the performance story.

01
Nitric oxide support
Arginine and citrulline are the substrate and recycled precursor for endothelial NO synthesis.
02
Exercise performance
Beta-alanine buffers muscle acidosis, extending the time to fatigue in high-intensity work.
03
Cardiovascular tone
Healthy NO signaling supports vascular relaxation and normal circulatory function.
04
Muscle pump
Vasodilation increases blood flow and nutrient delivery to working tissue.
05
Recovery support
Citrulline participates in the urea cycle, helping clear ammonia generated during training.
06
Energy utilization
Improved perfusion supports oxygen and substrate delivery to mitochondria.

Formula

Seven amino-acid actives. One NO strategy.

KEY INGREDIENTS

Calcium
as Calcium Carbonate
Niacin
L-Arginine
base
L-Arginine AKG 2:1 Extract
L-Citrulline HCL
L-Citrulline Malate Extract
Beta Alanine

OTHER INGREDIENTS

Cellulose (Vegetable Capsule), Vegetable Stearate, Silicon Dioxide

DIRECTIONS

Adults: **Suggested Use**: As a dietary supplement, take two (2) capsules once a day. For best results, take 20-30 minutes before a meal with an 8fl oz. glass of water, or as directed by your Healthcare Professional.

L-Arginine Complex supplement facts
MAY BENEFIT:
Energy
Immune System
Cardiovascular Health
Fitness & Athletics

Questions

Frequently asked.

Why combine arginine and citrulline instead of just one?
Arginine is the direct substrate for nitric oxide synthesis but has a short plasma half-life and is heavily metabolized on first pass through the liver. Citrulline bypasses that first-pass effect and converts to arginine in the kidney — so stacking them gives you both the immediate and the sustained arms of the same pathway.
Who is this formula designed for?
Adults focused on cardiovascular function, exercise performance, or healthy vascular aging. It is commonly used pre-workout by endurance and strength athletes, and more broadly for people supporting blood-flow-dependent tissues. Not for people under 18 without practitioner guidance.
When should I take it?
Two capsules once daily, 20-30 minutes before a meal with 8 oz of water. Pre-meal timing improves absorption by avoiding competition with other dietary amino acids. Pre-training dosing is also common for performance use.
What does the beta-alanine do?
Beta-alanine is the rate-limiting precursor to carnosine, an intracellular buffer in muscle. It helps blunt the acidic burn during high-intensity efforts, which is why many pre-workouts include it. At these doses you may notice mild tingling — a harmless sensory effect called paresthesia.
Can I take it with other supplements?
It layers well with creatine, electrolytes, and broader recovery stacks. If you are on blood-pressure or erectile-dysfunction medications (both of which can affect NO), talk with your healthcare provider first — the pathways overlap.
Is it safe during pregnancy or for children?
No. Pregnant or nursing mothers, children under 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.

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