Average vegan diets tend to be deficient in three nutrients, whereas average omnivores tend to unfortunately be deficient in seven.
Omnivore vs. Vegan Nutrient Deficiencies, 4.8 out of 5 based on 4 ratings
There is some bad news though, for those trying to eat healthy. Dietary intake studies have shown that vegans, on average, are not getting the recommended daily intake of three nutrients, calcium, iodine and vitamin B12. Using the same criteria though, omnivores are deficient in seven nutrients, calcium, iodine and five others. Still the EPIC Study found this year that vegans not getting enough calcium have increased bone fracture risk. Those getting enough, 600 milligrams a day were fine, but you know it's not enough to just understand intellectually that plant based sources of nutrients are superior. We need to put it into practice. The calcium in kale and broccoli is absorbed nearly twice as well as the calcium in milk but we cut our absorption down to zero if we let our greens rot in the fridge or we never buy them in the first place. It would be nice if we could somehow absorb the nutrients in fruits and veggies just by staring at them in the produce aisle but no, we actually have to eat them.
To see any graphs, charts, graphics, images, and quotes to which Dr. Greger may be referring watch the above video. This is just an approximation of the audio contributed by veganmontreal.
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For some context, please check out my associated blog post: Poultry Paunch: Meat & Weight Gain.