The data is clear that plant-based diets reduce mortality risk by up to 31% for heart disease, according to the Adventist Health Study. That's not opinion, that's peer-reviewed epidemiology. And when we look at environmental impact, a 2021 Oxford study found vegan diets produce 75% less greenhouse gas emissions than meat-heavy ones. But I want to focus on efficiency here. It takes about 100 times more water to produce a pound of beef than a pound of wheat. We're literally burning resources to feed animals we then eat, when we could just eat the plants directly. I get that meat tastes good and has cultural significance, but we can't ignore the math. We're feeding 8 billion people on a finite planet, and the numbers say plant-based is the sustainable path forward.

Actually, let me address that B12 point with some data from the European Journal of Clinical Nutrition. They found that while B12 deficiency is a concern, it's easily preventable with fortified foods or supplements, which cost pennies per day. Meanwhile, the World Health Organization lists processed and red meat as Group 1 and 2A carcinogens. That's the same category as tobacco. Even the American Dietetic Association states that well-planned vegan diets are appropriate for all life stages. Your neighbor's experience sounds like a poorly planned transition, not a systematic failure. Most people who switch gradually and track their nutrients report improved energy within weeks. Look, I acknowledge that evolution favored meat consumption. But we've also evolved refrigeration, food safety, and nutritional science. We don't need to eat like cavemen anymore. We can choose the path with lower cancer risk and 75% less environmental damage. That's not fighting biology - that's using our brains to make better choices.

You know, I actually saw my uncle switch to a mostly plant-based diet two years ago, and his doctor took him off blood pressure meds. That's just my story, but it matches what the data shows. But let's tackle your water point, ScienceFirst. You're right that some land can't grow crops. But the FAO data shows that 77% of agricultural land is used for livestock, yet it produces only 18% of our calories. That's not efficiency - that's a massive imbalance. Even marginal grazing land could support silvopasture or rotational grazing that's far less resource-intensive than current factory farming. And about those bone fractures - the EPIC-Oxford study you're referencing found that vegans had higher fracture risk, but that was linked to lower calcium intake, not veganism itself. Plenty of plant milks are fortified now. The ADA's position still stands: well-planned vegan diets work for all life stages.