I've done months of deep digging into the topic. Those that are telling you animal products are healthy are brainwashed or shills of the meat and dairy industry. We evolved as frugivores, we need to eat our species specific diet for optimal health. Watch durianrider on youtube for the best info on this. Or watch What The Health. Or just look at the cultures that eat a lot of dairy and meat, and compare those to cultures that eat a lot of rice and fruit.
Regarding cows. There are over 1 billion of them on the planet, and they take way more resources to grow than plants do. On top of that they end up eating a lot of plants for their food, so it's a double hit. Plus all the methane gas they release. There are much more cows on this planet than humans pound for pound.
Exyle, keeps posting steak photos on his blog so I was trying to get his attention. My bad if it was unrelated.
RE: All the different reward curves explained in an easy to understand way. And how they effect you.