The worst arguments against vegetarian and vegan nutrition

by Jakub Marian

Tip: See my list of the Most Common Mistakes in English. It will teach you how to avoid mis­takes with com­mas, pre­pos­i­tions, ir­reg­u­lar verbs, and much more (PDF Version).

The Internet nowadays is full of irrational hate against vegetarians. It really astounds me how some of the arguments miss the point, so I thought I’d write an article to debunk some of the most inaccurate and oft-repeated myths.

Note that the point of this article wasn’t to prove that vegetarianism is in any way better than non-vegetarianism, only to show that many common arguments against vegetarianism are, in fact, complete nonsense.

Myth 8: If we didn’t produce meat, we’d have to use much more land to produce all the necessary plants

That would only be true if meat were produced by livestock grazing on otherwise unusable land. In reality, we use huge areas of land to produce plants that are to be fed to animals. For example, it takes about 7 kg of grains (which contain only about 15% of water) to produce just 1 kg of beef (which is around 60% water); in other words, we need about 15 kg of nutrients in the form of grains to produce just 1 kg of nutrients in the form of beef. Wouldn’t it be a bit more effective to use these 15 kg directly? The statistical fact is, if we didn’t produce meat, we would need several times less land than we need now to produce the same amount of nutrients.

Myth 7: Eating meat is the reason why we are intelligent (because of calories in meat or vitamin B12)

I haven’t noticed any lions running around solving difficult mathematical problems. There are a large number of animals eating large quantities of meat and still not developing intelligence greater than most herbivores, so meat is not a magical source of great brains. It is theorized that a meat-enriched diet and hunting played a role in the development of intelligence in early hominids, but it is not known whether we would have developed intelligence without eating meat, and some anthropologists speculate that it was the introduction of cooking rather than meat-eating that was the main cause.

Either way, whether eating meat played a role in the development of early hominids some 2,000,000 years ago is pretty much irrelevant for the question whether there is any link between meat consumption and intelligence in modern humans, and studies have shown that eating meat does not lead to improved cognition in humans.

However, humans, like most other mammals, need vitamin B12 for their nervous system to work properly but are not able to produce it naturally in their bodies. Herbivorous animals that cannot produce vitamin B12 obtain it from plant matter covered with faeces and soil (which contain vitamin B12), which is not an acceptable solution for modern humans. Vegetarians can get sustainable (albeit low) amounts of B12 from eggs and milk, but pure veganism used to be very dangerous for humans. However, nowadays, when many vegan foods are fortified with vitamin B12 (which can be produced industrially by fermentation) and B12 supplements are widely available, this is no longer an issue.

Myth 6: If we didn’t produce animals for meat, they wouldn’t be born at all, so it’s good for them

Following the very same logic, if I had a child and kept it locked in the basement its whole life only to kill it at the age of six, it would be better than not having a child at all. That’s rather bizarre. This is true for most meat animals produced today, which live in a confined space and are slaughtered at about 1/10 of their natural lifespan; however, for organically produced meat (provided the animal lives a normal life and then it is humanely killed), this question is not so simple (and the argument might actually be valid).

Myth 5: It’s normal in nature for animals to kill other animals, so there’s nothing wrong with doing it

Things like trying to rape every female you meet or eating the male after sex are also normal in nature. We don’t do things because they are “normal”; we think about them rationally and then decide whether it is right or not to do them. If we were carnivores (who can’t survive without meat), we wouldn’t be having this debate. The point is that we don’t need meat to survive, eating meat in amounts we do now makes us unhealthy, and by doing so we produce a lot of unnecessary pollution and destroy vast areas of land with important ecosystems.

We simply have quite a few reasons not to produce (large amounts of) meat (at least using our current technology), even if we put ethics aside. That’s why we cannot blindly deem something acceptable just because it is “natural”.

Myth 4: But plants have feelings too / But plants are alive too

If I put a live chicken (clucking and fluttering) and a live potato (doing nothing) on a table in front of you, gave you a big knife, and told you to stab them both with it, where would you hesitate more? I think we all know there is a fundamental difference between plants and animals. If plants possess some form of higher cognition, it is still so primitive that not even scientists are able to detect it.

Animals aren’t all equal either. While most insects are basically biological robots with no higher cognitive abilities whatsoever, cows or pigs are in almost every respect (such as capability of feeling emotions and socially interacting with peers) equivalent to humans; they only happen to be less intelligent on average.

Capability of perceiving the world around us, feeling emotions and thinking rationally forms a continuous scale starting from none for inanimate objects and probably ending with humans, if we take into account only currently discovered living beings. Plants are very close to a rock on this scale; pigs are closer to humans than they are to insects. Where you want to draw the line is a personal decision, but deciding not to hurt organisms that have a nervous system is a valid approach.


Myth 3: If you don’t eat meat, you end up being weak and skinny

Tell that to the vegetarian on the right.

Myth 2: Humans are evolutionarily designed to eat meat

If you take a look at our closest relatives, the chimpanzees and other apes, and their behavioural patterns, you’ll soon realize that we were “designed” to eat mostly plants, with occasional small portions of animal products. Various vegetarian human cultures around the world have shown that we can do well without eating any meat at all, which is not surprising, considering our ancestors were mostly frugivores and only started to hunt out of necessity.

Myth 1: Humans need meat to survive / to get enough protein

In fact, humans can get all the nutrients they need from plants, milk and eggs, including enough protein, of which we don’t really need much (about 60g a day). That plants can’t provide all the necessary types of amino acids (proteins) is another myth. No single plant contains all the necessary amino acids at once, but as long as you eat at least two different kinds of plants, you should be fine. Also, eggs are a great source of all essential amino acidsactually much better than meat!

The only nutrient that cannot be obtained from a purely plant-based (i.e. vegan) diet is vitamin B12. This is not uncommon in natureherbivores that are incapable of producing their own vitamin B12 usually consume it with plants covered with faeces, which often contain vitamin B12 (but I doubt vegans would go as far as to do that). Since we can produce vitamin B12 industrially via fermentation, this is no longer an issue.

By the way, I have written several educational ebooks. If you get a copy, you can learn new things and support this website at the same time—why don’t you check them out?

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