I kept digging. And I found the research that put the whole picture together.
The compound that feeds the blood vessel pathway is called L-Citrulline. The body converts it directly into the molecule your blood vessels need to open up and deliver oxygen.
No nerve required. It bypasses the damaged nerves completely.
A 2011 clinical trial in the journal Urology showed men taking L-Citrulline daily had a 50% improvement in hardness. Against 8.3% on placebo.
But here's the catch.
L-Citrulline alone only works in 15-20% of patients.
Why? There's an enzyme that converts L-Citrulline into the blood flow molecule. In most post-surgical men, that enzyme is blocked. Inflammation from the surgery. Oxidative stress from months without oxygen.
The raw material just sits there. Does nothing.
Then I found the study from 2003 that changed everything.
40 men with nerve damage and ED.
L-Citrulline alone: 17% saw improvement.
L-Citrulline + Pine Bark Extract: 80% at 2 months, 92.5% by month 3.
Same men. Same nerve damage. The only difference: Pine Bark Extract.
Pine Bark activates the blocked enzyme. Clears the inflammation. And protects the blood flow molecule after it's produced — stops it from being destroyed before it reaches the tissue.
Without Pine Bark, the L-Citrulline is useless. You need both.
I sat at my desk reading that study and thought about Gerald.
If I'd known this four months ago, I might not have had to cut him open.