I used to be one of the people who made fun of vegetarians and vegans. Actually, that was about a year ago  :dead:...
I used to eat a heavy amount of meat in my diet (in fact, I ate a ridiculous amount and pushed away vegetables of any kind) as I am a bodybuilder, for the proootein. Well, I was pretty stupid about it and ate way too much red meat (hot dogs in particular), and many terrible artificial products and whatnot that visibly deteriorated my health. My joints would hurt a ton, I would always be very tired and unwilling to hang out with friends, and my attitude was crap. After living like this for a while, I began getting a serious acne problem on my face, and so I of course went on plenty of acne medications and all that good stuff for their recommended time. They didn't work.
So, I did some more research on acne, and read many many health books on the subject, and it seemed the best (yet most annoying for many people) solution to my problem was simply to better my health. Now, I obviously thought I was a pretty damn healthy guy; I mean, I had a very good physique... that makes me healthy, right? :wink: Anyways, one of the biggest causes for both my joint pain and my acne was the heavily acidifying diet I consumed (read: normal western diet, especially heavy on meat). This would need to be balanced by my bodies' own alkaline buffers, the best of which is calcium in your bones. So, while I thought I was supplying my body full of calcium with my ridiculous amounts of milk and meat and all that good stuff, I was pretty much just sucking it out of my bones. Also, eating a high amount of saturated fat in meats raised my blood fat levels (this inhibits the function of insulin, fyi). I'd compound the problem by eating a large amount of refined sugary foods, which would spike my insulin levels (and even higher due to insulin being inhibited) and caused my body to rely on different methods to lower my blood sugar. Candidiasis (or 'candida albicans'), a floral bacteria present in all of us (though in very small and controlled amounts) thrives on sugar, and my body allowed more sugar to go to these bacteria as it was at it's limit for dealing with it on its own. This caused an overgrowth of candida in my body, and one of the many symptoms of candida is acne (as well as depression, bad attitude, exhaustion, and plenty of other symptoms I was showing).
The best way to kill candida and raise overall health levels I found was to increase consumption of plant-based alkalizing wholefoods, and to reduce or eliminate my consumption of acidifying and refined, and, well, pretty much useless foods in terms of nutrition. This included meat, wheat, lowered intake of soy, refined sugar or food, and the like. What does that leave? Well, a surprising amount, actually. See, I was under the impression that once meat is eliminated from your diet, protein is nearly impossible to come by... maybe a bit here and there in some nuts. Actually, the plant kingdom is VERY abundant in protein; a fact many dietitians and YOU seem to ignore :tongue2:. For example, hemp, yellow pea, brown rice, flax seed, chlorella and plenty other plant foods contain a very high amount of protein (between 30-60% per calorie content), and when uncooked and unrefined, this protein has its enzymes intact and is perfectly complete source of protein (it contains all essential and non-essential amino acids) and thus is VERY easily digested, resulting in more useable nutrients as well as it is alkalizing in the intestines.
Also, B12 is NOT nonexistent in plants, it's just a bit harder to come by nowadays. Some great plant sources of B12 include chlorella (a damn book could be written on the benefits of chlorella), cordyceps sinensis, suma, nori (seaweed) and some other types of seaweed as well. Note this: a perfect wholefood multivitamin can be easily made with EVERY ingredient of an artificial multivitamin using just plants, in fact, there is a very popular vegan brand called "Vega" who produces such a wholefood multivitamin/meal replacement (and contains, for those who give a crap, 7 g of fat, 4 of which being essential polyunsaturated, 23 carbs (15 grams of which is in fibre, 1 in sugar), and 26 grams of protein. That's 7:23:26 fat:carbs:protein. With every nutrient you could possibly need. All made with plants, and non-allergic ones either. Kinda kicks the crap out of a lot of carnivorous arguments, right?).
Anyways, sorry for the rant, my point is is that now I am MUCH more outgoing, my muscles grow FASTER than before (mmhmmm), my cholesterol levels are very low, I cured my acne problem, I can run 15 miles and not feel tired. I dunno, I just feel perfectly "nourished". I'm never hungry, I never crave foods I used to eat (imagine looking at raw broccoli, does your appetite scream "EAT IT!!!" to you? Probably not. That's what it's like for me and 'junk food' now. My body realizes it doesn't get 'nutrition' from them, only calories.) In fact, when I'm hungry, I crave fruits, vegetables, raw nuts and the like. So in that sense, it just takes a transitional period to get over your love for the foods Americans usually eat.
To sum it up: You get everything you need from plants, iron, b12, protein, zinc, magnesium, I don't care; everything. So don't use that as a basis for argument against vegetarianism. It's also actually MORE healthy, in my opinion and experience.
Now, on to those who say it's natural to eat meat and unnatural not to:
Let's take a look at our physiology. Take a look at your hands and think about how strong and fast you are in comparison to other animals. Looking at myself, I don't think I could go catch a rabbit very easily (not without the use of my superior brain anyways, but I'll get to that). I'm not sure I could wrestle down a cow and then bite into it's flesh and have that as my evolutionarily given trump card to food gathering. However, I am pretty well built to pick fruit off of a tree, in fact, I did so just a little while ago and had a decent time doing it (cherry trees ftw). Picking vegetables, as well; pretty easy stuff. Also, it just so happens that fruits and vegetables happen to contain a lot of fibre in them (very important for digestive health) and many vitamins and minerals as well. Also, fruit contains a high amount of natural sugar. What is my main source of fuel for EVERY CELL IN MY BODY? Nice, it's glucose! Pretty easy there. I eat sugar from fruits, and I don't need to task my body with converting it into anything other than what it already is; it's ready to be used. Fats need to be converted, though, are still important for long-term energy usage, but I think you see my point. Protein are used for muscle recovery and building, and so are important for a different use. (Although, just so you know, if you eat too much protein and too little carbs and fat, your body CAN convert protein into sugar, but it is a highly toxic process and that's a retarded diet anyways, so...)
Now let's look at our digestive system in relation to other animals. Carnivores' have very strong digestive acids that can melt bones. They can swallow meat without even chewing it, and it'll dissolve in their stomachs. What happens when you swallow say a seed or a piece of corn even without chewing it? It passes through. That's how strong your digestive juices are :tongue:. Also, look at our teeth differences. The lower part of jawbones of carnivores are locked; ideal for ripping flesh from bones. Also, their teeth are quite sharp. However, we DO know that we are anatomically and physiologically similar to gorillas and monkeys and the like. They consume mostly fruits and green, leafy vegetables, though will occasionally eat some insects if few are available. Seriously, just look at fruits and vegetables: Their nutritional profile matches our needs, they can be eaten without needing to be cooked or seasoned, they are hostile to bacteria, virus, parasites, and other pathogens because of their alkalizing nature and they are instinctively appealing to us because of their taste/sweetness.
However, many will argue that we are omnivores, and we don't need to stay in one food group. Well, actually, yes, that's true, but it's also not optimal. No animal is really adapted to eat all things, but if any animal comes close, it'd have to be the bear. They consume ants, bees, honey, seeds, roots, nuts, berries, insect larvae (grubs), flowers, rodents, fish, deer, pigs, lambs and fish. Sounds a bit like an American diet, which is why many conclude that the natural human diet is that of an omnivore. But looking at our physiology again, the biggest difference is in our teeth; omnivores have sharp canines of a carnivore as well as the pronounced incisors of the herbivore. They also have molars that are both pointed and broad-topped. That's nothing like ours. Also, our digestive tract matches that of frugivores (gorillas, etc.) being about 10-12x the length of the body from mouth to anus. Carnivores are 3-5x, and herbivores 20-28x. So, by this definition, we are frugivores.
Does this make a vegetarian diet automatically better? Not really. In fact, there are some theories that, depending on blood type, some people actually do better when they include meat in their diet. Other factors in our diet affect our health to a much greater degree than simply whether we eat meat or not.
However, eating too much meat (3oz or less a day is perfectly fine), like I've rambled on above, significantly compromises good bacteria and promotes bad bacteria (ie: Candida) as well as making your intestines acidic.
So to break this down:
- It is NATURAL for humans to eat a purely plant-based diet. That being said, it's also 'natural' to eat a small amount of meat.
- One can gain all they need from a plant-based diet, as long as they're not stupid about it (even without an artificial multivitamin, if they can get ahold of either a wide array of plants or simply some Vega or a similiar product.)
- Too much meat can be detrimental to your health, but to a lesser degree than say refined wheat and sugary treats, or lack of excercise... or stress... or lack of any of 'teh gud stuf'.
So with that, you're not allowed to 'make fun' of vegetarians. Honestly, it doesn't take a PhD to step back and look at this with common sense. Of course, vegetarians can be very unhealthy. I mean, eating a microwaveable pizza pocket (cheese flavour) is vegetarian, right? Yeah. Is it healthy? Hell no. So vegetarian =/ healthy, but it's a step in the right direction; no meat means a quicker digestive route (meat stays in our digestive system for ridiculously long while fruits/veggies go through quickly and cleanly).
Last thing, our brains. What do you think developed first evolutionarily, our brains or our bodies? It doesn't take a stretch to figure our bodies became as they are, and our brains developed to their current state later on. I mean, if our brains developed first, we wouldn't really need to be as strong or fast or tall or big as we are, that's all a waste of energy that could be put into creating junk. So taking that into account, my argument on eating easy-to-obtain fruits and vegetables makes more sense. Meat eating probably became 'normal' in a time ago measurable in the thousands of years; hardly enough for us to become perfect omnivores. Maybe enough to tolerate and use meat for some good. I'm not sure where some of you get the idea that eating plants and vegetables is unnatural while eating meat is.
Mah gawd, sorry for the huge response, and for being a bit unorganized, but this is a big point
PS: This isn't even touching on the subject of the wastefulness of meat production compared to plant production. Combat me on these points and I'll elaborate:
-60% of the greenhouse gas production if from meat production (and people get pissed off at your for driving too much :P)
-I think someone already mentioned the waste of land for meat production to veggies. Something like 1:3000, it's insane. People get mad at biofuels taking up space, >.>.
Also, if you care about your health but refuse to give up meat, make a determined effort to eat organic. Organic meat does away with the hormones and toxic chemicals in meat, relieving some of the nutritional stress on your body.