High in copper. This may not seem to be important, but it is critically important today when most people are already extremely toxic with copper.
Low in zinc. This is also a very serious and almost universal nutritional imbalance already, and vegetarian diets tend to make it much worse. The main foods that contain zinc are meats.
Too high in carbohydrates. This applies especially to vegan diets that do not contain eggs or dairy products. The remaining foods available are mainly high in carbohydrates, such as grains and beans. Most people already eat too many of these foods, so they become even more imbalanced and malnourished, even if the quality of the food is excellent.
Low in protein. This is not necessary, but often occurs with vegetarian and especially vegan diets. There are simply many fewer protein foods to choose from, so people tend to live on more pasta, bread, grains, fruits, and other non-protein foods.
Poor quality proteins. Most vegetarian proteins do not seem to nourish the body nearly as well as does meat, eggs, and possibly raw dairy products. Most vegetarians, however, exist on more soy protein, nuts and seeds, and some protein from grains. This is not as good for ones health and causes low phosphorus readings on hair tests, telling us that these proteins do not rebuild the body as well.
Very low in the essential sulfur-bearing amino acids such as taurine, cysteine, carnitine and methionine. This is a very serious problem with vegetarian diets, perhaps one of the worst. These amino acids are essential for liver detoxification of the heavy metals and of all toxic chemicals as well. No matter how clean the diet, without them the body cannot remove toxins as well, and this shortens the lifespan in all cases, in my experience.
Extremely low in vitamin D. This is another critical problem today. Most vitamin D comes from fish oils, and perhaps a little from organic, raw dairy products, though not enough for most people. The sun, meanwhile, is not providing enough vitamin D, even if you sit in it all day long.
Extremely low in omega-3 fatty acids. This is another critical deficiency, although this can be corrected by adding at least two tablespoons of ground flax seed to the diet every day.
Often low in B-complex vitamins. Many people obtain the bulk of their B-complex vitamins from meats, which are rich sources, along with eggs. This problem with vegetarian diets is quite harmful and makes them particularly unsuitable for most people today, especially those of the white or Caucasian race.