If a vegan diet is very carefully planned, and that requires either fortified foods or supplements, it can be AS healthy as a good meat eating diet. I think there are a couple of benefits, but they come from eating a wide range of fruit and veg and being health conscious as vegans have to be, not omitting meat, and thus those benefits can be go without actually going veggie. Needless to say a uncarefully planned vegetarian, or especially vegan, diet can lack many essential nutrients and be very bad for your health.
There are many benefits to a diet containing meat. Many vegetarians claim that meat is unhealthy. This is a blatant fallacy.
It is well established that eating meat improves the quality of nutrition, strengthens the immune system, promotes normal growth and development, is beneficial for day-to-day health, energy and well-being, and helps ensure optimal learning and academic performance.
A long term study found that children who eat more meat are less likely to have deficiencies than those who eat little or no meat. Kids who don’t eat meat — and especially if they restrict other foods, as many girls are doing — are more likely to feel tired, apathetic, unable to concentrate, are sick more often, more frequently depressed, and are the most likely to be malnourished and have stunted growth. Meat and other animal-source foods are the building blocks of healthy growth that have made America’s and Europe's youngsters among the tallest, strongest and healthiest in the world.
Meat is an important source of quality nutrients, heme iron, protein, zinc and B-complex vitamins. It provides high-quality protein important for kids’ healthy growth and development.
The iron in meat (heme iron) is of high quality and well absorbed by the body, unlike nonheme iron from plants which is not well absorbed. More than 90 percent of iron consumed may be wasted when taken without some heme iron from animal sources. Substances found to inhibit nonheme iron absorption include phytates in cereals, nuts and legumes, and polyphenolics in vegetables. Symptoms of iron deficiency include fatigue, headache, irritability and decreased work performance. For young children, it can lead to impairment in general intelligence, language, motor performance and school readiness. Girls especially need iron after puberty due to blood losses, or if pregnant. Yet studies show 75 percent of teenage girls get less iron than recommended.
Meat, poultry and eggs are also good sources of absorbable zinc, a trace mineral vital for strengthening the immune system and normal growth. Deficiencies link to decreased attention, poorer problem solving and short-term memory, weakened immune system, and the inability to fight infection. While nuts and legumes contain zinc, plant fiber contains phytates that bind it into a nonabsorbable compound.
Found almost exclusively in animal products, Vitamin B12 is necessary for forming new cells. A deficiency can cause anemia and permanent nerve damage and paralysis. The Vitamin B12 in plants isn't even bioavailable, meaning our body can't use it.
Why not buy food supplements to replace missing vitamins and minerals? Some people believe they can fill those gaps with pills, but they may be fooling themselves. Research consistently shows that real foods in a balanced diet are far superior to trying to make up deficiencies with supplements.
Some people claim that meat is unhealthy because it contains saturated fat. So does margarine and olive oil, and they're vegan suitable (in fact the hydrogenated fats in Marge can be very bad, but that's another story). Besides, any excess calories in your diet, any excess sugar, starch or carbohydrates are stored in your body for later use. This is done by turning them into saturated fats.
Cholesterol too. Your body on average creates four to five times more cholesterol than the average person consumes.