Ok so in this thread I want all the different nutrients that are (for the most part mistakenly) thought to be lacking or deficient in a human veg/rveg diet to be covered with references to online sources if at all possible. The thesis is that there are no known essential nutrients in the human diet which cannot be obtained in ample amounts from plant sources or the human body, so at the very least the majority of humans notwithstanding some unusual health condition should do fine on a nutritionally adequate veg/rveg diet. Also of interest would be covering health conditions that are believed to require supplementation or inclusion of animal derived foods or nutrients, and to investigate whether or not this is the case. In no particular order here are the nutrients which must be covered:
(the most common:)
Vitamin D (D2 vs. D3)
Protein (how much protein a vegan needs; why the predigested form found in fruits are superior to 'quality proteins' from animal foods;)
These are some more obscure non-essential nutrients which are either absent (carnosine) or harder to come by (the rest) on veg diets. They are cited by anti-veg or skeptics as nutrients which humans may lose the ability to produce with age or due to certain health conditions .. without of course providing any evidence that this is the case thru blood tests or other objective tests:
If I'm missing anything that should be covered above let me know or post below. Anything you want to contribute just post below and I'll compile above and eventually put into a factdoc as Prad suggests.
The significance of this list is that if it can be shown that a vegan diet is completely nutritionally adequate if done properly (which it almost certainly is), and the health concerns which human consumption of animal food entails are enumerated (which will be the topic of the next discussion), it leaves virtually no ethical justification for humans purchasing and consuming animal derived foods, notwithstanding harrowing situations like dire food shortages or being stranded in the wild long term.