I've covered oxalates a few times but I want to be a bit more specifc about their actual harm in the body.
Oxalates are compounds found in a lot of plant foods such as spinach, almonds, sweet potatoes, beets, etc.
Most people don’t really care or think about them, but they can become a real issue in the body.
When oxalates bind with minerals like calcium, they can form crystals. These crystals can lodge into tissues and organs, contributing to inflammation and pain over time. They essentially are like mini razor blades that can tear up your body and internal tissues.
About 80% of kidney stones are calcium oxalate stones. Some vegans and other mentally ill people have tried to pin this on having too much calcium, obviously you want a LOT of calcium, especially in puberty, and the issue is the excess oxalates.
If you drink a ton of raw milk you will not get kidney stones, if you drink a daily green smoothie you may get end up with a kidney stone in just 2 weeks which is exactly what happened to liam hemsworth for example: https://people.com/health/liam-hemsworth-needed-surgery-that-forced-him-to-completely-rethink-his-vegan-diet/
Here’s another problem, if your diet is high in oxalates, they can bind to calcium in your blood (serum calcium). If that calcium isn’t available, your body starts pulling it from your bones to maintain an essential level of serum calcium. Over time, this can weaken your bone density.
The fact that this phenomonon has been observed shows just how much calcium can actually get nuked by oxalates (remember you want as much calcium as possible via a natural diet, so if your calcium serum levels are so depelete that you are actually harvesting calcium from your own bones, you are in deep trouble.