No! What the fuck is this picture!? Someone else spotted it on Facebook. There's no source listed anywhere, except for a site called c-a-l-f.com. I took the liberty of wallowing through that shit pile of a site to see what kind of solid proof they had on their website.
Instead, all I found were a bunch of angry vegans who are upset we are killing cows. So, basically, these guys at c-a-l-f.com have managed to create a viral image about how beef and dairy is just as bad as alcohol and heroin in order to get people to kill less cows, because they love cows. These guys love cows so much, that they're willing to lie to fellow humans to achieve their goals.
I used to laugh at PETA because I thought they didn't really care about animals and were just trolling the world, but the fact that it seems like every animal rights group I see is borderline retarded, I'm thinking that some of these people really do believe what they're saying. Look at the attachment, it's something that someone made in MSPaint in 5 minutes. Not only that, but their website is awful.
Don't fall for the whole "beefy and dairy causes cancer" thing, it's a bunch of cow fucking hippies trying to scare people from eating beef so they can spare a few cow's lives.