Not to mention the fiber must be off the charts. Any fat’s not sticking around long enough to be absorbed.

Broccoli stands out a bit. Cabbage and cauliflower and kohlrabi and bok choy don't have the same protein ratio, because other brassicas we eat as vegetables are generally higher in carbs, so that their protein per calorie is lower (with more calories from carbs rather than protein).

No, I’m literally talking about the bioavailable protein for you, a human.

Don’t forget that Homo sapiens evolved as fructivorous apes eating stuff like broccoli and our omnivorous diet is a recent development. (The bacteria-dependent digestion you mentioned is for the cellulose in grass, not protein.)

Skill issue

For broccoli? No, that's actually a fairly bioavailable protein source, especially when cooked. Even compared to high protein plant sources like beans or lentils, broccoli's protein is more bioavailable. It's just there's not that much of it, and the "protein per calorie" stat is kinda cherry picked from the fact that broccoli is low carb and low fat, rather than being really high in protein.

Either way, though, the gut microbiomes of herbivores are mainly adapted to draw out more useful carbohydrate, not more useful protein. Cellulose is so plentiful in nature that making use of all those glucose molecules is biologically rewarding.

Plant protein bioavailability is affected by a lot of factors, including whether the food has been chopped up, peeled, cooked, etc. Human chewing and guts (especially in modern humans) are pretty inefficient for extracting nutrients from food in the natural state because we have been cooking and processing food for millions of years.

So yeah. Cows have complicated guts for digesting cellulose and extracting amino acids from chloroplasts, and innate chewing behaviors that mechanically process grass into mush, but we have knives and fire to do more of that stuff outside of our bodies. And cattle pick and choose grasses (including high protein leafy legumes like clover or alfalfa) depending on their own needs, as well.

Radioactivity

https://www.bbc.co.uk/news/magazine-34225517

But for a healthy person, "it would be impossible to overdose on bananas," says Collins. "You would probably need around 400 bananas a day to build up the kind of potassium levels that would cause your heart to stop beating... Bananas are not dangerous - and in fact they are, and always have been, very good for you."

Adults should consume about 3,500mg of potassium per day, according to the UK's National Health Service. The average banana, weighing 125g, contains 450mg of potassium, meaning a healthy person can consume at least seven-and-half bananas before reaching the recommended level.

There are some people who should steer clear of foods that are high in potassium though, warns Collins - those with kidney disease.

"These patients have a very low kidney function which can potentially see a build-up of harmful potassium levels in their blood stream because they can't get rid of the mineral when they pass urine," she says. "So in theory it is possible for someone with kidney disease to die of a high blood potassium level if they decided to consume lots of different food types rich in the mineral."

She once had a patient on dialysis who had a heart attack after eating too many tomatoes - another fruit rich in potassium. His kidneys had already stopped working so he was unable to get rid of the excess.

Maybe people suspect it's not just a vegan diet but also steroids n shit. Don't know if steroids are vegan though.

Only one downvote that I can see, although I don't know if anyone banned from My server is downvoting. People banned from My server tend to be right-wing reactionaries, so that would explain it. To reactionaries (and indeed most people), facts don't matter as much as which "side" they support. Support vegan bodybuilders, and you're implicitly attacking meat-eating ideology. So people downvote because their meat ideology feels threatened.

We all get our protein from gut bacteria, or at least thanks to gut bacteria. In nutrition, "protein" refers to the collection of the proteins (amino-acid chain macromolecules) that we can digest. The rest of the proteins (the proteins we can not digest) are called "fiber" in nutrition.

Pure herbivores' main advantage over us is their ability (through their gut bacteria) to make use of all the carbohydrates in cellulose.

For protein, cattle and other herbivores do have a higher ability to extract usable amino acids from plant sources within the actual structural matrix of how they exist naturally in the plant, but we humans deal with that by processing and cooking our food instead of eating raw plants. Herbivores also have to do a lot more mechanical processing, especially chewing, to break down the structure of the plant matter for their guts to process.

The fact is, herbivores have to eat so much more food than meat eating animals do. Gorillas eat 30 kg of food per day. Elephants eat 75-150 kg of food per day.

And in captivity, fruit-eating primates need protein supplements, to make up for the fact that human-bred fruit tends to be much higher in sugar and lower in protein (per calorie, at least) than what these animals eat in the wild, especially when you account for insect parts that are common in wild fruit.