Soy Milk And Kidney Stones

I suffer from calcium-oxalate kidney stones and my doctor advised me to stop
consuming all soy products. However, as I was also told to maintain a high
dietary calcium, which inhibits stone formation, and I don't drink cow's
milk, I still drink soy milk.

My question is this: Even though soy milk contains a high level of oxalic
acid, most brands like Silk also contain calcium carbonate. My belief, as a
retired chemist, is that the alkaline calcium carbonate slowly complexes
with the oxalic acid in storage and produces insoluble calcium oxalate. In
addition, as free calcium from the calcium carbonate is liberated by
digestive hydrochloric acid, it also combines with any remaining oxalate.

Calcium oxalate in the digestive tract is insoluble, will not move through
the digestive mucosa, and is not a risk to kidneys. Only free oxalate which
can form calcium oxalate in the kidneys is a risk. I would appreciate the
opinions of knowledgeable experts.

---
"Those who cannot learn from history are doomed to repeat it". -- George
Santayana


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