Short answer: Four of MemoHoney's six ingredients — the two arginine forms and the two citrulline forms — work through the same mechanism: they are precursors your body uses to make nitric oxide.
Why two ingredients that do the same job are both included
Citrulline is generally the more efficient route because less of it is lost to first-pass metabolism — a specific, honest reason both forms appear alongside direct arginine.
Why this matters for how you read the six-ingredient list
The ingredient count is larger than the number of distinct mechanisms — a direct, unusually honest disclosure worth understanding before assuming more ingredients means more distinct benefits.
💡 Worth knowing: that is the single idea the formula is built on — nitric oxide production supporting blood vessel dilation and circulation.