Kidney Stones Oxalates Spinach. Some opponents of green smoothies argue that oxalate rich foods commonly used in green smoothies may cause kidney stones in susceptible individuals. There are different types of kidney stones.
Foods high in oxalate include nuts and nut butters especially almonds and various vegetables such as beets and beet greens rhubarb and spinach. This is not the most important part of avoiding kidney stones but is an important piece to consider. Spinach is very high in oxalates and is known to increase kidney stone formation and urinary oxalate content according to the cleveland clinic.
This is not the most important part of avoiding kidney stones but is an important piece to consider.
Some opponents of green smoothies argue that oxalate rich foods commonly used in green smoothies may cause kidney stones in susceptible individuals. For example certain people at risk for calcium oxalate kidney stones may get recurrent stones from eating too much dietary oxalate including spinach. I don t get stones but as i grow older i have some gout issues. In this context kale and spinach are frequently mentioned.