Do the Oxalates in Spinach Cause Kidney Stones? 

Even though dietary oxalates may not have a big impact on the risk of kidney stones in most individuals, there are certain risk factors that can make anyone susceptible. Kidney stones can be extremely painful and affect up to one in ten people in their lifetime. The most common type is oxalate stones, which form when the concentration of oxalate in the urine becomes so high that it crystallizes. Some foods, like spinach, have high levels of oxalates. However, studies have shown that people who get kidney stones do not generally consume more oxalates than those who do not. This suggests that absorption of oxalates may play a larger role than intake. The impact of dietary oxalate on the concentration of oxalates in urine seems to be minimal, as shown in a study examined at 1:21. Nevertheless, some rare cases have been reported where individuals drinking green juices and smoothies, high in oxalates, developed kidney stones. It is essential to consider the potential effects of certain foods, especially for people with high risk factors such as kidney abnormalities. Later information is available on my other videos, follow me on Facebook, Instagram, and Twitter for more details.
For more details watch my video Kidney Stones and Spinach, Chard, and Beet Greens: Don’t Eat Too Much.