I am going to defer to The Science Channel on the specifics but I watched an episode all about food where they put some "high risk" people on a gorilla diet, basically all fruits and veggies, raw.
The first problem they encountered is that in order to get the adequate amount of calories, vitamins, and protein they had to basically eat constantly. The first few days on the diet they simply couldn't finish their daily allowance of food. Even when they got on track with the volume, they still lost weight and a number of health indicators had drastic swings away from high risk categories in a very short amount of time on the diet.
That being said, anyone who says that humans eating meat in not natural is simply retarded. For humans and a number of other primates, including our closest relatives, meat is an important part of our diet although it certainly does not need to be as rediculously prevalent as it is in modern culture where you basically have meat as part of every single meal.
My personal goal for nutrition (battling extreme mixed-hyper-lipidemia as my doctor calls it) is to only eat meat at night as part of a high fiber/protein diet during peak cholesterol production times (i.e. night time). It is quite amazing which simply cutting meat to 1 vs 3 times a day and adding a 10 fold increase in my intake of soluable fiber. I was able to cut my numbers by more than half which I was told was impossible by my doc.
That being said, I still have a ways to go to get out of the high risk range for diabetes. Basically my triglycerides are still extremely high so I am on a megadose of Niacin and have also had awesome results with that. I hate the flushing, but it works wonders for triglycerides.
Edited by Jazzns, : No reason given.
Of course, biblical creationists are committed to belief in God's written Word, the Bible, which forbids bearing false witness; --AIG (lest they forget)