Could someone please clarify where Vitamin B12 actually comes from? Since reading the Vegetarian Starter Kit you can access through this site, I've thought it was something you could ONLY get from animal products (since that's what the guide says). However the other day was scrolling through a veg forum and saw a topic all about B12. It said it's actually a bacteria that's found (pretty much) in everything; water, plants, etc.
Apparently a hundred years ago you didn't need to consume animal products (or fortified foods or supplements) to get your daily dosage of B12 because it was found in your drinking water and organically farmed food. Nowadays, thanks to higher cleanliness and chemical farming, the only way we can get ENOUGH of it is through a.products or supplements. But it still exists in vegan forms, (that's where the animals get it from) just not in high enough concentrations.
I thought B12 only came into existence through some process in the animals' guts, but according to this forum that's not the case. So could someone please clarify this for me?
Also, it leads me to discuss another question. Are B12 supplements even vegan? If it can only be gained from a.products, then surely animals are being used to get the vitamins for the supplements, yeah? But if you don't actually need the animals, like the forum posts said, then I suppose the companies just breed the bacteria in a factory or something. Anyone know for sure?
Sorry about my ignorance.