Vegan, honestly: what a decade of research actually changed

Let's get the boring part out of the way: a well-planned vegan diet is fine for a healthy adult. Every major nutrition body agrees. That's been settled since the 2000s, and if you came here for me to tell you kale is a miracle, I'm going to disappoint you.

The interesting part is what changed.

"Plant-based" stopped meaning "healthy." This is the big one. Researchers split plant diets into two piles: the healthful kind (whole grains, legumes, fruit, veg, nuts) and the unhealthful kind (refined grains, sweets, soda, ultra-processed everything). The first drops heart-disease and diabetes risk by a quarter or more. The second raises it (Satija et al., JACC 2017). A vegan living on fries and white bread is technically plant-based and measurably worse off than your friend eating a balanced omnivore plate. So "is it vegan" was never the right question. "Is it food" is closer.

The evidence got harder to argue with. Nutrition studies are mostly observational — they watch people who already eat a certain way, and healthy-user bias haunts all of it. Then in 2023 Stanford ran identical twins. Same genes, same upbringing, one twin vegan, one omnivore, eight weeks. The vegan twins came out with lower LDL, lower fasting insulin, more weight loss (Landry & Gardner, JAMA Network Open 2023). That's about as close as nutrition gets to controlling for "well, they were healthier to begin with."

The institutions moved — and got more honest, not less. Germany's DGE spent years effectively steering people away from vegan diets. In 2024 they reversed: fine for healthy adults with B12 (DGE 2024). A big cautious body admitting it was wrong. I respect that. And then the Academy of Nutrition and Dietetics did the opposite of cheerleading: in 2025 they narrowed their famous "all life stages" line down to healthy adults, explicitly carving out pregnancy and lactation (AND 2025). Not because veganism got worse — because the evidence for pregnancy and kids is thin, and they said so. When the pro-plant body tightens its own claims, trust it more, not less.

Now the part vegan blogs skip: the caveats. I'd rather you hear them from me.

• Bone fractures. Vegans have shown meaningfully higher fracture risk in large cohorts. Most of it vanishes once calcium, vitamin D, B12, and protein are adequate (Tong et al., BMC Medicine 2020). The catch: a lot of vegans aren't adequate on those. Don't be that vegan.
• Hemorrhagic stroke. EPIC-Oxford found a higher signal in vegetarians, possibly a B12 story (Tong et al., BMJ 2019).
• Colorectal cancer. A 2026 pooled analysis of 1.8 million people flagged a higher signal specifically in vegans. Small subgroup, hotly debated, and the Adventist data point the other way — but I won't pretend it isn't there (Fraser et al., Br J Cancer 2026). Watch the space.

None of these are "gotcha, veganism bad." They're "plan it, and get bloodwork."

The one non-negotiable. B12. Take it — 250 mcg a day or 2,000 a week. No reliable plant source, there never was one, and "but nutritional yeast" is not a plan. After that: iodine (not kelp — kelp doses are a lottery), algae-based omega-3, check your vitamin D, watch iron if you menstruate, hit calcium and protein with variety. That's the whole list. It fits on an index card.

And the protein thing. "But where do you get your protein?" …plants. I get my protein from plants. The myth that you can't build muscle without meat is dead — with adequate protein spread through the day, plant eaters gain and perform right alongside everyone else (Hevia-Larraín 2021). And "combine your proteins at every meal"? The woman who popularized that in 1971 retracted it in 1981. You've been carrying a 45-year-old correction's worth of guilt for nothing.

Where I land, and where Vegify lands: this isn't a purity contest. Not everyone can go vegan tomorrow. Food deserts are real, poverty is real, eating disorders are real. If someone's grocery run is a gas station, "just eat more lentils" is a privileged thing to say, and I won't say it. The goal was never compliance. It's access — more good plant options on more shelves, so the day you get curious, it's an easy yes. Maybe that's today. Maybe it's a Tuesday five years from now when your regular spot finally stocks a decent oat milk and you switch without thinking about it. That counts too. That's the whole game.

The science is on solid ground. The caveats are real and manageable. The door's open whenever you are. :)

(Research synthesis, not medical advice. Before changing supplements, get baseline bloodwork and talk to a dietitian or doctor.)