Quote Originally Posted by d0zer View Post
B12? No idea which you're referring to because it's tough to find a dietitian in this day and age that doesn't acknowledge that vegetarian diets are able to meet nutritional requirements without supplements, especially with eggs and dairy.

Vegan diets are tougher without supplements (oral, not non-intramuscular (lol)), but not impossible. Just impractical for people who don't have tons of time on their hands.
Yes, B12. The impossibility to absorb this vitamin if it doesn't come from an animal source is one of the reasons why many vegetarians aren't vegetarians. They somehow think that eating eggs or fish magically allows them still call themselves vegetarians. Yet if they don't consume those at the very least they will be weaker and stupider due to a lack of DHA, EPA, and B12

There are likely more nutrients that only animals can provide, and I believe it is unreasonable to think that a diet that doesn't adhere to the basics of evolution can be assumed to adequate