Common claims about veganism, examined with scientific evidence. We present what the research shows — including where the evidence is uncertain or mixed.
“Humans evolved to eat meat, so a vegan diet is unnatural and unhealthy.”
The Truth:
Early humans did eat meat, and the archaeological evidence for that is solid. Whether meat drove brain evolution is a different and unresolved...
“Vegan diets inevitably lead to nutritional deficiencies”
The Truth:
Well-planned vegan diets are nutritionally adequate for all life stages according to major dietetic associations. Some nutrients require attention...
“If vegans need supplements like B12, it proves the diet is unnatural and inadequate”
The Truth:
B12 comes from bacteria, not animals. Livestock are supplemented with B12 or cobalt. Taking supplements directly is simply more efficient than...
“Eating meat is part of my cultural tradition, so it cannot be wrong”
The Truth:
Cultural traditions are not inherently ethical. Many harmful practices were once traditional. Cultures evolve, and we can honor heritage while...
“Lions eat meat, so it's natural and ethical for humans to eat meat”
The Truth:
Lions are obligate carnivores without moral agency. Humans are omnivores capable of ethical reasoning. We don't base our ethics on lion behavior for...
“Eating meat is natural, so it must be ethical”
The Truth:
This is the "appeal to nature" fallacy. Many natural things are harmful (diseases, violence), and many unnatural things are good (medicine,...
“Plants feel pain too, so eating them is no different from eating animals”
The Truth:
Plants respond to damage through sophisticated chemical and electrical signaling, but they lack the nociceptors, neurons, and centralized nervous...
“Vegans kill more animals because harvesting crops kills field animals”
The Truth:
This argument actually supports veganism: animal agriculture requires MORE crops (for feed), causing MORE field deaths, PLUS the intentional deaths of...
““Humans have always eaten meat, so stopping is wrong.””
The Truth:
See also: "Eating meat is natural" for the core rebuttal of the appeal to nature. This page focuses specifically on the appeal to tradition — the...
““Meat-eating is natural, so it’s okay.””
The Truth:
See also: "Eating meat is natural" for the core rebuttal of the appeal to nature. This page focuses specifically on the ethical and philosophical...
““If you want burgers, you want meat.””
The Truth:
Enjoying a flavor/format (burger, sausage) doesn't imply you endorse the harms of producing it with animal bodies. People often want the experience...
““I like the taste of meat, so veganism isn’t for me.””
The Truth:
Liking a taste isn't immoral; the ethical question is whether brief pleasure justifies an avoidable harm to a sentient being. Many people keep...
“Vegan food is too expensive for most people”
The Truth:
The cheapest foods in most grocery stores are vegan: rice, beans, lentils, pasta, oats, frozen vegetables. Specialty vegan products can be expensive,...
“One person going vegan doesn't make any real difference”
The Truth:
Individual choices aggregate into market signals. In the US, approximately 25 land animals and an estimated 220+ aquatic animals are killed per capita...
“Cats and dogs are carnivores, so feeding them a vegan diet is unhealthy and cruel.”
The Truth:
Half wrong, half misunderstood. Dogs aren't carnivores at all — domestication adapted them to digest starch, and in feeding trials lasting up to a...
“My friend tried veganism, felt worse, and quit — so vegan diets must be unhealthy.”
The Truth:
Some people do try veganism, feel worse, and quit — but the cause is almost always execution, not plant-based eating: no B12 supplement, too few...
“You'll never convince everyone to go vegan. It's not going to change anything.”
The Truth:
Every social justice movement in history was told it would never succeed. The vegan movement is one of the fastest-growing in the world — 25.8 million...
“Eating meat is a personal choice. Don't tell me what to eat.”
The Truth:
A "personal choice" that kills 80 billion land animals per year, drives up to 20% of global emissions, fuels antibiotic resistance, and exploits...
“What about hunting? I hunt my own food — that's different.”
The Truth:
Wild game represents less than 1% of US meat consumption, while 99% of farmed animals come from factory farms. If everyone hunted to meet current...
“But soy causes deforestation, almonds use too much water, and avocados are bad for the environment too.”
The Truth:
Approximately 75-77% of global soy feeds livestock, not humans. Even the most resource-intensive plant foods produce dramatically fewer emissions, use...
“We should fix human problems first before worrying about animals.”
The Truth:
Animal agriculture IS a human problem. It diverts enough crops to feed billions of additional people, drives 12-20% of greenhouse gas emissions, fuels...
“Agriculture requires animal manure and cannot maintain soil fertility without livestock.”
The Truth:
The nitrogen cycle does not require animals. Biological nitrogen fixation by legumes is the original source of soil nitrogen. Plant-based alternatives...
“Wool and honey are harmlessly collected byproducts that do not involve animal suffering or death.”
The Truth:
Both the wool and honey industries involve documented harms extending well beyond the collection process — including mulesing without anesthesia,...
“Lab-grown meat technology will solve the environmental problems of animal agriculture, making individual dietary change unnecessary.”
The Truth:
Cultivated meat holds real promise but remains years from commercial scale, while the climate crisis demands emissions reductions now. The IPCC calls...
“Regenerative grazing sequesters enough carbon to offset livestock emissions, making ruminant agriculture climate-neutral.”
The Truth:
Regenerative grazing can improve soil health on individual farms, but peer-reviewed evidence overwhelmingly shows it cannot offset total livestock...
“Veganism is only accessible to wealthy, privileged people and is inherently classist.”
The Truth:
Plant-based staples (beans, rice, lentils, potatoes) are among the cheapest foods globally. A 2021 Oxford study found vegan diets reduce food costs by...
“Animals in high-welfare systems live good lives and die without suffering, making humane slaughter morally acceptable.”
The Truth:
While welfare improvements reduce suffering compared to the worst factory farming, the concept of "humane slaughter" faces a fundamental philosophical...
“Buying local animal products has a lower carbon footprint than importing plant foods from far away.”
The Truth:
Even accounting for transport emissions (which are larger than previously thought at ~19% of food-system emissions), what you eat matters far more...