Quote from: niamh on March 23, 2012, 04:09:50 AM
Grains, beans, pulses, nuts, seeds, fruit and veg. Humans are cultural omnivores but in terms of our evolutionary-diet, we're herbivores. I eat a vegan diet and it does me great but most of western society is happy with a diet largely based around animal flesh.
I'd read 'The China Study' if you're curious Devlyn.
The China Study is repeatedly stated as proof that a vegetarian diet is good for everyone. However, if anyone reads the book in detail they will see that the author doesn't provide any real proof that the study says what he says it says. The book is a weak and biased analysis of the China Study data. And his conclusion is widely controversial, see:
http://www.sciencebasedmedicine.org/index.php/385/. This is one of those books where people read what they want to read in it. Some people seem to do fine on vegetarian diets. But for many people, a higher amount of protein and fat in their diet is the only way to keep their blood sugar down and their overall hunger down. Probably 2/3 of the population falls into this category.
There is no credible evidence that humans evolved as herbivores. Moreover, humans did not eat any grain or cow milk until 10,000 years ago even though we have existed as a species for nearly 200,000 years. 10,000 years is probably not enough time for significant evolution for our bodies to prefer a high grain, high cow milk diet. Cows milk has one purpose in nature and that is to rapidly grow baby cows into large cows weighing at least twice the weight of a human. Why would it be good for us? We can get calcium by eating lots of healthy vegetables including broccoli and spinach.
I personally believe everyone should try what they think will work and get detailed blood work and other tests before and after their change in diet. For blood, check cholesterol (Triglycerides, HDL, LDL and VLDL), HemoglobinA1C (to measure average blood sugar), C Reactive Protein (to measure inflammation) and perhaps insulin and blood sugar levels after fasting. Also check blood pressure and % body fat (not total weight.)
These whole grain diets are not natural. The proteins that are in wheat are not designed by humans to be eaten. They cause many diseases including gluten sensitivity, celiac disease and potentially a whole host of other auto immune problems when they leach into the bloodstream through the intestines which they irritate. Once they leach into the blood stream the immune system gets confused and attacks the body. Many diseases including multiple sclerosis are suspected of being caused, in part, by auto-immune reactions triggered by wheat. It is now becoming increasingly believed (but not conclusively proven) that these grains cause a bunch of other sub-clinical problems linked to poor health.
Dairy products also have similar issues.
I believe different people will be sensitive to different diets. But the notion that we are not designed to eat meat as part of our diet does not hold water. We have teeth that can eat plants and meat. Most mammals have teeth for one or the other. We have stomach acid which easily digests meat unlike many herbivores.
Your vegan diet may be wonderful for you. But it may literally kill other people 20 years early from increased blood sugar and undiagnosed secondary effects from gluten sensitivity.