You don't want to do that without researching the facts and fats first.
(Keep in mind this is not about farm fed meat, but organic grass fed animals.)
Fats and brain size
The evidence was already overwhelming that we could not be a vegetarian species. However, in 1972 the publication of two independent investigations really nailed the lid on the vegetarian hypothesis's coffin. The first concerned fats (9) .
About half our brain and nervous system is composed of complicated, long-chain, fatty acid molecules. The walls of our blood vessels also need them. Without them we cannot develop normally. These fatty acids do not occur in plants. Fatty acids in a simpler form do but they must be converted into the long-chain molecules by animals - which is a slow, time-consuming process. This is where the herbivores come in. Over the year, they convert the simple fatty acids found in grasses and seeds into intermediate, more complicated forms that we can convert into the ones that we need.
Our brain is considerably larger than that of any ape. Looking back at the fossil record from early hominids to modern man, we see a quite remarkable increase in brain size. This expansion needed large quantities of the right fatty acids before it could have occurred. It could never have occurred if our ancestors had not eaten meat. Human milk contains the fatty acids needed for large brain development - cow's milk does not. It is no coincidence that in relative terms, our brain is some fifty times the size of a cow's.
The vegetarian will be dismayed to learn that while soya bean is rich in complete protein, and grains and nuts also combine to provide complete proteins, none contains the fats that are essential for proper brain development.
Although the eating of fats today is believed by some to be a cause of heart disease (erroneously, see The Cholesterol Myth ), we know that our ancestors ate large amounts of fat. Animal skulls are broken open and the brains scooped out; long bones likewise are broken for their marrow content. Both brain and marrow are very rich in fat.
Toxicity of raw vegetables
The second investigation (10) concerned the inedibility of many of today's plant foods in the raw state which contain many anti-nutrients that can damage a wide variety of human physiological systems. These antinutrients include alkylrescorcinols, alpha-amylase inhitors, protease inhibitors, etc. These must be broken down by cooking, and cooking for a long time, before they can be eaten safely. Beans and other legumes although rich in both carbohydrate and protein, also contain protease inhibitors. Starchy roots - yams and cassava - are common staples today, but if not well cooked are very toxic indeed. The cassava even contains cyanide which must be oxidised by heat to make it safe to eat. And apart from the anti-nutrients above, the starch in cereals - wheat, rice, barley, oats, and rye - are also inedible in quantity if not cooked first. Cooking causes the starch granules in the flour to swell and be disrupted by a process called gelatinization Without this the starch much less accessible to digestion by pancreatic amylase. (11) (See also soybeans below.) Unlike meat, which can be easily digested in its raw state, vegetables should really never be eaten raw and cereals should be fermented and then cooked for a very long time before being eaten to neutralise the phytic acid and other toxic anti-nutrients. That fact that we don't do these things is the reason for so much atopic disease - asthma, eczema, and so on - around today.
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