Comment by Madmallard

(1) Heme-iron is really the only good way to get iron and it's only in meat (2) You're not really going to get carnitine from vegetables (3) You're going to have a really hard time eating enough calories and having balanced ratios of macro-nutrients. Beans and rice which have protein also have tons of carbs and no fat. Good luck with that.

I've seen literally dozens and dozens of videos and posts of really really malnourished people advocating veganism. It's pretty much too hard to execute for the average person.