I usually eat 2-3cups of spinach a day ( on my green /protein smoothie) friend told me consuming too much spinach can cause kidney stones,trueormith?

Oxalate: Spinach is loaded with oxalic acid. Excessive consumption of oxalates can cause kidney stones. However, kidney stone formation varies in individuals. It is best to avoid or limit spinach if one has history of stones or kidney disease.

Myth: While spinach has a good amount of calcium (which is a component of kidney stones), your body can only absorb so much calcium at a time. As long as you stay hydrated, you should not have a problem. Hope this helps!

Spinach and oxalate: Is true - be careful - Spinach is rich in oxalate; calcium oxalate forms 80% of stones in adults; many foods contain oxalate, only nine foods are believed to increase importantly in the urine and then promote kidney stone formation. They are: beets, spinach, rhubarb, strawberries, nuts, chocolate, tea, wheat bran, and all dry beans It is best to avoid these foods. Drink 3 to 4 liters per day