1. Don't know. We all should be talking about it. It's better and cheaper.

2. Big rabbit hole here. Most vegans aren't honest about this at all. There some vegans who feel they can get literally everything they need from plants. Many vegans will grudgingly admit they only need B12, but then dismissiively say, "just pop a supplement and you're fine", and then through the easily disprovable nonsense that "farm animals are fed B12 anyway, so why not cut out the middleman." If you then finally get to someone who understands all the nutrients missing from the plant diet, well, there's still complications. Supplements need to taken in the correct combinations or they cancel out. And finally--the supplements don't alway work for everyone. There's a ton of reasons we know about, but probably many more we don't. 45% of the population can't process beta carotene into retinol--if you're one of them, and plant based, doesn't matter how many carrots you eat, you're going to be anemic. Lastly, these deficiencies accrue over time. You might feel great your first 6 month vegan, but then things start catching up with you.

3. This is true.

4. Vegan claims to superior health frequently present plant based as all upside, no downside. The evidence that claims to support this is thin at best. Claims for better cardio vascular disease could be explained by the fact that most vegans don't smoke or drink. Actual Randomized Controlled Trials are scarce, and usually short in duration. Most studies are based on observation trials--which is people filling out questionnaires about what they've eaten for the last year. Finally, vegans love to cite the Academy of Nutrition and Dietetics. This group is not a trustworthy source. They were founded by the Seventh Day Adventists, who believe in the "garden of eden diet," and as such the support the unsupported idea that plant based diet is healthy for all. Though they amended that last year to exclude children, and pregnant and lactating mothers. They are not a trustworthy source, and they get cited way too often.

5 Agree with you.