I've noticed the same effect also.One thing for sure, When i UP The sodium Intake! and i mean Really up it to 3,4,5 G a Day. I get way more veins everywhere...
Another thing is when i eat a really clean for like a week then i Eat like 1 meal consisting of shitload of crap, like Candy, Chips,Bake ,cake and capucino and The day after i get ALOT of Veins in arms and Delts....
and Synthelator,
which is carried by Synthetek, but that's for a show or shoot. It's a one dose boost in vascularity and muscularity. Do a search on it.