We love greens and have made a commitment in our household to grow them abundantly in our garden and to eat them with relish. However, when we are consuming greens in quantity, particularly in dishes like our extra-green soups, we do pay attention to the content of oxalic acid in them. Oxalic acid will reduce your digestion on minerals such as calcium and iron; it can also give you kidney stones. Spinach, collards, and lambs quarters have enough oxalic acid that we do take care to reduce it with boiling. (Read more about calcium and oxalic acid on our partner site.)
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