Oxalate is a naturally occurring molecule found in abundance in plants and humans.
It's not a required nutrient for people, and too much can lead to kidney stones.
However, research indicates that boosting your intake of calcium-rich foods when you eat foods that are high in oxalate may be a better approach than simply eliminating it from the diet.
As they digest, oxalate and calcium are more likely to bind together before they get to the kidneys, making it less likely that kidney stone.