Independent guide
L-Arginine vs L-Citrulline: What’s the Difference?
Both amino acids are discussed in relation to nitric-oxide metabolism, but they are not interchangeable.
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Core difference
L-Arginine directly participates in nitric-oxide synthesis. L-Citrulline can be converted to L-Arginine in the body.
How to compare studies
Do not compare milligram amounts as though the two compounds are identical.
Product selection
Consider studied dose, tolerability, other ingredients and health context.
SpartaMax context
The current SpartaMax merchant page highlights L-Arginine, not L-Citrulline.
Related pathway: SpartaMax ingredients → SpartaMax review
Health note: Persistent erectile difficulties, major libido changes or unexplained fatigue can have multiple causes. Consider medical evaluation rather than relying solely on a supplement.