Many people have written to us over the recent years saying they have been told by their doctors that Spinach is bad for them, not to eat it unless you want kidney stones, etc.,. Jay and I have been juicing spinach for over 30 years, together…..and we have never had a kidney stone. So, with this question in mind, it brought me back to research our favourite book, Raw Vegetable Juices by Dr. Norman Walker. Here’s his quote:
“Spinach should never be eaten when cooked unless we are particularly anxious to accumulate oxalic acid crystals in our kidneys with the consequent pain and kidney trouble. When spinach is cooked or canned, the oxalic acid atoms become inorganic as a result of excessive heat and may form oxalic acid crystals in the kidneys.” (p. 62).
“When the food is raw, whether whole or in the form of juice, every atom in such food is vital ORGANIC and is replete with enzymes. Therefore, the oxalic acid in our raw vegetables and their juices is organic, and as such is not only beneficial but essential for the physiological functions of the body.”
“The oxalic acid in cooked and processed foods, however, is definitely dead, or INORGANIC, and as such is both pernicious and destructive. Oxalic acid readily combines with calcium. If these are both organic, the result is a beneficial constructive combination, as the former helps the digestive assimilation of the latter, at the same time stimulating the peristaltic functions in the body.”
“When the oxalic acid has become INORGANIC by cooking or processing the foods that contain it, then this acid forms an interlocking compound with the calcium even combining with the calcium in other foods eaten during the same meal, destroying the nourishing value of both. This results in such a serious deficiency of calcium that it has been known to cause decomposition of the bones.” (p. 63)
Take the research with a grain of salt, or take it seriously…we just wanted to share with you what we know and have experienced. Too much of anything is definitely not good for balance in life, so it’s probably best not to be juicing a pound of spinach daily, but to add a cup of spinach into your daily juice or salads seems to us, just to be fine.