Once your nuts have shrunk they don't produce the hormones for erections.
You never see these hairless muscle bound wonders in their pictures with big nuts.
Not that I look that closely, but they all seem deficient down that end.
I reckon good water,air, exercise, food and regular sex is the way to go, not all these greeny blue concoctions.
gg
No natural supplements are going to make any males balls shrink sounds like you are a bit clueless on this whole issue and running off on a tangent mate