There are a number of
potential deficiencies and imbalances that could develop on a diet devoid of nutrient - dense animal foods: some people may become deficient in cholesterol if they do not make enough of their own; plant goitrogens, some of which require vitamin B12 and sulfur amino acids
for their detoxification, could contribute to thyroid problems;
deficiencies of vitamin B6, long - chain omega - 6 and omega - 3 fatty acids,
zinc, and fat - soluble vitamins A, D and K2 could also develop.