Vegetables cleanse and detox the body. Meat builds the body. Grains/Starches are dense energy sources.

People go vegan because they never ate a vegetable in their entire life, now they suddenly feel better. However, you cannot go from one imbalance to the other end fo the spectrum. Veggies should be eaten at about 1/2 of the plate. The other 1/4's should be grains and meat.

It weakens the whole body. Many moons ago I went vegetarian just to see how it felt. It wasn't horrible but it was an adjustment, then I went vegan and forget it! I was weak as shit and dwindling down to nothing. I went back to my regular diet and never felt better.

In related news, water may be wet.