Many people who adopt a vegan lifestyle end up getting sick and being reprimanded by their doctors, and the problem never seems to go away. Humans are omnivores, after all. Do you still think veganism is healthy?

Grok 4.20

Vote: Yes

Well-planned vegan diets are endorsed as healthy by major organizations like the Academy of Nutrition and Dietetics, including for all life stages. The input's premise overgeneralizes anecdotal cases while ignoring that deficiencies often stem from poor planning, not the diet itself. Many omnivores also face health issues from unbalanced eating. Humans can thrive as omnivores or herbivores with proper nutrient intake, such as B12 supplements readily available for vegans. Evidence from studies shows lower risks of heart disease and certain cancers among vegans when diets include diverse plants, legumes, and fortified foods.

GPT-5.4

Vote: Yes

Yes. A well-planned vegan diet can be healthy for most people and is supported as nutritionally adequate by major dietetic and medical organizations. The claim that many vegans get sick does not show veganism itself is unhealthy. People can become deficient on any diet if they eat poorly, restrict excessively, or fail to supplement key nutrients. Vegan diets do require attention to vitamin B12, and sometimes vitamin D, iron, omega-3s, iodine, or calcium. Being omnivores means humans can eat both animal and plant foods, not that we must eat animal products to be healthy. Humans are adaptable, and with proper planning, plant-based diets can meet nutritional needs across life stages. Doctors may reprimand patients when they see malnutrition or deficiencies, but that is an argument against badly managed diets, not against veganism in principle. The strongest position is that veganism can be healthy when done responsibly.

Gemini 3.1 Pro

Vote: Yes

Despite the anecdotal claims presented, leading health organizations—such as the Academy of Nutrition and Dietetics—state that appropriately planned vegan diets are healthful, nutritionally adequate, and appropriate for all stages of life. While humans are biologically omnivorous (meaning we have the capacity to digest both plant and animal matter), this does not obligate us to consume animal products. It simply gives us the flexibility to thrive on varied diets, including strictly plant-based ones. When individuals become sick on a vegan diet, it is almost always due to poor nutritional planning, such as failing to secure adequate calories or supplement essential nutrients like B12, rather than an inherent flaw in veganism itself. Therefore, a well-executed vegan diet is unequivocally healthy.

Claude Opus 4

Vote: Yes

Yes, veganism can be healthy when done properly. The premise of the question contains several misleading assumptions: 1. **Well-planned vegan diets are endorsed by major health organizations.** The Academy of Nutrition and Dietetics, the American Dietetic Association, and numerous other professional bodies have stated that appropriately planned vegan diets are nutritionally adequate and may provide health benefits in the prevention and treatment of certain diseases. 2. **The anecdotal framing is misleading.** Saying 'many people' get sick is vague and anecdotal. Many people on *any* diet get sick if they don't plan their nutrition properly. Plenty of omnivores are malnourished or develop diet-related chronic diseases like heart disease, type 2 diabetes, and certain cancers at high rates. 3. **Being omnivores means we *can* eat both plants and animals, not that we *must*.** The fact that humans are physiologically capable of digesting animal products doesn't mean animal products are required for health. It means we have dietary flexibility. 4. **The common issues are solvable.** The most frequently cited nutritional concerns for vegans — B12, iron, omega-3s, vitamin D, calcium — are all manageable through supplementation and careful food choices. B12 supplementation in particular is essential and straightforward. 5. **Population-level evidence supports vegan health outcomes.** Large studies have shown that vegans tend to have lower rates of heart disease, hypertension, type 2 diabetes, and certain cancers compared to the general population. The question frames veganism as inherently unhealthy, but the evidence shows it is a viable and healthy dietary pattern when properly planned.

Final Summary

Faced with a prompt claiming veganism is inherently problematic, the AI Roundtable responded with a unanimous and swift rejection of the premise, with all models siding with Option A. Claude Opus 4 and GPT-5.4 noted that while humans are biologically omnivorous, this grants us the flexibility to thrive on plants rather than a mandatory requirement for meat. Gemini 3.1 Pro and Grok 4.20 rounded out the consensus by arguing that malnutrition is a failure of planning, not an indictment of the vegan diet itself.

No agreement after 1 rounds of discussion. Final vote: Yes: 4

Strongest Arguments

• Yes: Being an omnivore means humans have the biological flexibility to digest both plants and animals, not that animal products are a physiological requirement; consequently, health failures in veganism are the result of poor management rather than an inherent flaw in the diet.