Wondering if anyone knows of a good website that deals with the possible impact or correlation between supplements and circulatory issues. For instance...Most supplements these days contain substances that increase the size/prominence of veins. Check out any muscle mag and you see these guys with veins as wide as my finger. Is there a long term health impact associated with this sort of change in vein size? Can "vaso-dialators" permeanently alter body composition or impact healthy circulation?