come on dude, with veins like that? either they're juicing, or their diet consists entirely of saturated fat and salt.
I'm not saying they are, or are not, natural. I'm just saying they could most definitely be natural. I myself have been MUCH MUCH more vascular than that when I was in my mid-20s, not to mention I've seen dudes SMALLER and less defined with bigger bicep/delt veins.
But yeah, my diet consisted mostly of beef jerky and sushi at the time too. I miss Japan.