Hmmmm...
You can still avoid the chemical v1agra - there is a weed that the research of said drug is based on & it also has a long history in TCM for this purpose and it also increses the amount of the "Little Swimmers".
Dodder Seed: Its 'Tu Si Zi' in vernacular Chinese...
{Cuscuta sp. - Convolvulaceae}
L-Arginine & Zinc are important as well as Flower Pollen Extract (not the Bee Pollen - but that doesn't hurt)
I wouldn't worry about Deficiency of the Amino , particularly as its not an Essential Amino you'll be hard pressed to get a good test and find adequate information about it...
As for the NO-Cycle Puncture Vine {Tribulus terrestris - Zygophyllaceae} will help & I think it was L-Carnitine.
I have had good luck with Catuaba Bark (Erythroxylum catuaba - Erythroxylaceae)
and Muira Puama {Ptychopetalum olacoides - Olacaceae}.
Ive been waiting to try Longjack, Tongkat Ali {Eurycoma longifolia - Simaroubaceae}.
EFAs , Milky Oats, & Maca Root are good 'all rounders'.
There used to be more info about NO in the female websites to get their arousal activated, so who knows what they say now.