Not really a study, but this is from a plant based nutrition site... Oxalic acid is a molecule that plants produce to bind extra calcium within the plant. This molecule helps the plant function properly, but it also means that when we eat the plant, the calcium is harder for the human body to digest and absorb. https://khni.kerry.com/news/nutriti...managing-nutrient-intake-and-bioavailability/
I went vegan on a bit of a whim really, I only really planned to do it for a week. Really wished I’d had all my bloods done before though, while I ate meat etc. Had them done about 10 months after being vegan and (I do take B12, but so should meat eaters) every single one was bang on perfect. Feel healthier and no heartburn etc. as you say studies often say different things. Very often they coincidently say things that are positive to the people that fund them!
Certainly don't want to get anyone started but what's hypocritical about choosing not to eat meat because you'd rather not be party to animal suffering? Is it the case that we should try to increase animal suffering? If so, fine. Then I'd have happily kicked the dog at four o'clock this morning when he woke me up, crying to be let out, even though I know that he didn't need a wee but just wanted to bark at cats. The **** him.