Short answer: The three amino acids are combined in a 500 mg proprietary blend, so the exact individual milligram split is not published, even though every ingredient itself is named plainly.
Why "named plainly" and "exact split disclosed" are two different standards
Knowing that L-Arginine HCl, L-Arginine AKG and L-Citrulline Malate are included is meaningfully different from knowing how much of each makes up the 500 mg total.
Why this gap is disclosed directly, not hidden
This appears as its own specific note under the ingredients section — a genuinely honest acknowledgment rather than implying full transparency where it doesn't exist.
💡 Worth knowing: named, transparent ingredients is still listed as a genuine advantage — worth understanding this as partial, not full, transparency.