Short answer: L-Citrulline is an amino acid the body converts into L-Arginine and then nitric oxide — a specific reason this formula centers on Citrulline rather than direct Arginine.
Why this comparison is the subject of its own dedicated blog post
The formula's own materials link directly to "L-Citrulline vs. L-Arginine," explaining why one often works better than the other, taken orally — a genuinely detailed comparison worth reading.
Why oral absorption specifically is the deciding factor
Direct arginine supplementation faces absorption challenges that citrulline's conversion pathway is designed to address — worth understanding this as the core reason behind the formula's ingredient choice.
💡 Worth knowing: L-Citrulline's relationship to nitric oxide production is well documented, including work searchable on PubMed.