What does Nitrosigine do?

Patented arginine compound shown to boost blood flow and may support focus in active adults.

Proprietary ingredient owned by Nutrition 21 — most published studies are industry-funded, which can introduce bias

Nitrosigine - Science-Based Research

What the Science Says

Nitrosigine is a patented, inositol-stabilized form of arginine silicate designed to raise nitric oxide levels in the body. In a small clinical trial, a single 1500 mg dose increased flow-mediated dilation — a measure of blood vessel flexibility and blood flow — by about 31% compared to placebo, performing similarly to citrulline malate. Early research also suggests it may support cognitive function and mental focus in physically active adults, though this evidence is limited.

What It Doesn't Do

Won't build muscle on its own. The 'pump' effect doesn't automatically translate to better workout results. Not proven to improve endurance or strength in large-scale trials. Not a replacement for training or a balanced diet. Evidence for cognitive benefits is very preliminary — don't expect dramatic mental performance gains.

Evidence-Based Benefits

Nitrosigine is a patented, inositol-stabilized form of arginine silicate designed to raise nitric oxide levels in the body. In a small clinical trial, a single 1500 mg dose increased flow-mediated dilation — a measure of blood vessel flexibility and blood flow — by about 31% compared to placebo, performing similarly to citrulline malate. Early research also suggests it may support cognitive function and mental focus in physically active adults, though this evidence is limited.

Weak Evidence

Effective at: 1500 mg daily based on study doses

Source: auto-research

Absorption & Bioavailability

Good — the inositol-stabilized form is specifically designed to improve arginine absorption and sustain elevated blood arginine levels longer than standard L-arginine, though head-to-head bioavailability data from the provided studies is limited.

Red Flags to Watch For

Proprietary ingredient owned by Nutrition 21 — most published studies are industry-funded, which can introduce bias
Only 3 indexed papers available; the evidence base is very small for a widely used pre-workout ingredient
Found in 533+ registered supplement products, meaning marketing claims far outpace the research
Small study populations (e.g., 24 participants) limit how broadly results can be applied
Acute single-dose studies don't tell us much about long-term safety or sustained effectiveness

Products Containing Nitrosigine

See how Nitrosigine is used in these analyzed products:

BEYOND RAW (Brand)

Supplement

4/10 Mostly Legit

KAGED Elite Pre-Workout