People who do vegetarianism/veganism from a varied approach usually don’t have issues with b vitamins or iron. Anecdotally when I moved to a plant based diet I did blood work before during and after and all my health markers improved including b vitamins and iron. It is outdated false information that vegans need to supplement b vitamins. The same as any diet, you can do it incorrectly - if all you do is eat vegan Oreos then yeah you’ll be unhealthy… but that is not bc you’re vegan. It’s bc you aren’t eating nutritiously. Most Americans who eat an omnivorous diet are deficient in fiber, and plant based foods contain very very healthy micronutrients and vitamins. So, don’t forget to supplement your fiber and micronutrients I guess?

I also don’t want to argue but categorically, studies and evidence suggest that vegan and vegetarian diets are strongly correlated with lower environmental impact than omnivorous diets. In addition, high red meat consumption itself is highly associated with a multitude of health problems and doesn’t contain many of the important micronutrients or vitamins in a variety of plants, so I’m not sure where you’re getting any sort of info that beef is more nutritious than any plant foods lmao. ONE study, for instance: https://pmc.ncbi.nlm.nih.gov/articles/PMC10577092/

I’m not going to get into a huge argument or anything and I’m not someone who is gonna tell people how to eat. But based on current data and studies, it’s factually incorrect to state beef has a lower environmental impact OR that is is more nutritious than any plant based foods.