Did you try the product?
I recall a longer time
@REDZULU2003 mentioned about beet root, if my memory serves me correct.
I would personally look for a more direct beet root product or just dried beet root if you're considering that to be the key element.
I'd favor just Citrulline (along with beet root consumption in some form), it's a bit odd that there's Arginine and Citrulline in the linked product.
But let us know if you tried the product and found it to be good.
I just like to combine my own stack from certain elements.

I'm still a big advocate of Swedish Flower Pollen / Bee Pollen and proper hydration.