Vegans are especially at risk for B12 deficiency due to the lack of the vitamin in their diet. Vegetarians are also at risk but due to less strict dietary constraints their chances for B12 consumptions are drastically higher <span>than a vegan's. B12 is found primarily in meat, eggs and dairy products.</span>
For emergency like cut in others
Everyone would die and the human population would eventually die out.
C is not a response of stress.
